A method for additive manufacturing of a copper object comprises manufacturing the object by selective fusion of powder layers superposed on a support, the selective fusion of a powder layer being obtained by the movement or sweeping of a laser beam over the powder layer, wherein the powder layer is metallic and comprises at least 95% by mass of copper. Each fusion zone of each powder layer is swept at least twice by the laser beam, the first sweep of the laser beam allowing creation of a film of nanoparticles in the surface of the powder present in each fusion zone, wherein this nanoparticle film reduces the reflectivity of the powder in each fusion zone, and the second sweep of the laser beam fusing the powder in each fusion zone due to the presence of the nanoparticle film created by the first sweep.
L'AIR LIQUIDE SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGE (France)
AddUp (France)
Inventeur(s)
Dudret, Stéphane
Charpentier, Coralie
Doublet, Sébastien
Chauvet, Edouard
Bounouar, Kilian
Abrégé
A device for continuously mixing a first powder and a second powder, includes a first metering device for continuously metering the first powder, and a second metering device for continuously metering the second powder, a mixer designed to mix the first powder metered by the first metering device and the second powder metered by the second metering device so as to supply a continuous stream of powder mixed according to a determined ratio, and a sampling device designed to sample a fraction of the stream of mixed powder.
B01F 27/724 - Mélangeurs à agitateurs tournant dans des récipients fixes; Pétrins avec des agitateurs tournant autour d'un axe horizontal ou incliné avec des hélices ou des sections d'hélices avec une seule hélice étroitement entourée d'un boîtier
B01F 35/00 - Accessoires pour mélangeurs; Opérations auxiliaires ou dispositifs auxiliaires; Parties ou détails d'application générale
A method for calibrating a sensor for monitoring a melt pool belonging to a system for monitoring a melt pool of an additive manufacturing machine comprises at least the following steps: measuring and recording the value of the signal transmitted by the monitoring sensor when it is not exposed to a reference radiation, exposing the monitoring sensor to the reference radiation, measuring and recording the value of the signal transmitted by this monitoring sensor when it is exposed to a reference radiation, calculating a correction coefficient for this monitoring sensor from a reference value associated with the reference radiation and the values of the signals, and recording in a correction table the correction coefficient for this monitoring sensor and the value of the signal transmitted by the monitoring sensor when it is not exposed to a reference radiation.
A method, for segmenting a part (10) comprising a plurality of thin elements (12) separated by interstices (30), the thin elements being in the form of thin walls (14) having a thickness of less than 1 millimetre and/or thin strands having a cross-section of less than 4 square millimetres, comprises the following steps, in order: a) filling the interstices located between the thin elements of the part to be segmented with a filling material, b) segmenting the part into a plurality of portions by segmenting said thin elements, and c) removing the filling material from the segmented portions.
The invention relates to an additive manufacturing machine (10) for additive manufacturing by powder bed deposition and selective consolidation of said powder, the machine comprising a manufacturing enclosure (12) in which the additive manufacturing is implemented by powder bed deposition and selective consolidation of said powder, a wall (20, 50) of said manufacturing enclosure being equipped with a window (18, 48), the machine comprising a replacement system (52, 54) making it possible to automatically replace the window equipping a wall of said manufacturing enclosure with another window, and the replacement system comprises a seal which is inflatable between a window and the wall equipped with this window.
B22F 12/00 - Appareils ou dispositifs spécialement adaptés à la fabrication additive; Moyens auxiliaires pour la fabrication additive; Combinaisons d’appareils ou de dispositifs pour la fabrication additive avec d’autres appareils ou dispositifs de traitement ou de fabrication
B22F 10/28 - Fusion sur lit de poudre, p.ex. fusion sélective par laser [FSL] ou fusion par faisceau d’électrons [EBM]
The invention relates to an additive manufacturing device (20) comprising: - an enclosure (7) configured to contain powder (6) and to produce a discharge gas flow (15) against the powder (6), - a laser source (1) configured to produce a laser beam and expose the powder (6) to the laser beam through a window (2) of the enclosure (7), - a blowing nozzle (3) and a suction nozzle (8) configured to produce a protective gas flow (18) in the enclosure (7) against the window (2).
B22F 10/28 - Fusion sur lit de poudre, p.ex. fusion sélective par laser [FSL] ou fusion par faisceau d’électrons [EBM]
B22F 10/322 - Commande ou régulation des opérations de l’atmosphère, p.ex. de la composition ou de la pression dans une chambre de fabrication d’un écoulement de gaz, p.ex. du débit ou de la direction
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
B29C 64/371 - Conditionnement de l’environnement en utilisant un environnement autre que l’air, p.ex. un gaz inerte
B33Y 30/00 - Appareils pour la fabrication additive; Leurs parties constitutives ou accessoires à cet effet
B33Y 40/00 - Opérations ou équipements auxiliaires, p.ex. pour la manipulation de matériau
B33Y 50/02 - Acquisition ou traitement de données pour la fabrication additive pour la commande ou la régulation de procédés de fabrication additive
7.
DEVICE AND METHOD FOR ADDITIVE MANUFACTURING WITH DUSTING OF A POWDER SPREADING CARRIAGE
The invention relates to an additive manufacturing device (1) comprising an enclosure (3) and a conveyor (5A, 5B, 29A, 29B) configured to recirculate manufacturing powder, the enclosure (3) comprising: - a work-holding platform (7); - a carriage (13) configured to spread powder on top of the work-holding platform (7); - a dusting appliance (23A, 23B, 33) included in the carriage (13) and configured to trigger a jolt or a vibration in the carriage and remove powder from the carriage; and - an inlet of the conveyor (5A, 5B, 29A, 29B), the device being configured to feed removed powder (42) from the carriage (13) into the inlet of the conveyor (5A, 5B, 29A, 29B), the inlet (6A, 6B) being located between the work-holding platform (7) and an end-of-travel position of the carriage.
B22F 12/60 - Dispositifs de planarisation; Dispositifs de compression
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
The invention relates to an additive manufacturing machine (10) for additive manufacturing by deposition of layers of powder and selective consolidation of these layers of powder, the machine (10) comprising a device (18) for depositing layers of powder, a working plane (12), a selective consolidation zone (14), a main jacket (42) of outer contour (Cex), and a secondary jacket (46) arranged inside the main jacket (42) and defining a non-manufacturing zone (48) inside the selective consolidation zone, the device (18) for depositing layers of powder comprising a powder distribution device (22) and a powder spreading device (24), the secondary jacket (42) is closed at the top by a flat closure wall parallel to the working plane (12) of the machine, and the powder spreading device (24) moves in translation above the selective consolidation zone (14) along a rectilinear movement axis (DR).
B22F 5/10 - Fabrication de pièces ou d'objets à partir de poudres métalliques caractérisée par la forme particulière du produit à réaliser d'articles avec des cavités ou des trous, non prévue dans les sous-groupes précédents
B22F 10/28 - Fusion sur lit de poudre, p.ex. fusion sélective par laser [FSL] ou fusion par faisceau d’électrons [EBM]
B33Y 30/00 - Appareils pour la fabrication additive; Leurs parties constitutives ou accessoires à cet effet
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
A method for manufacturing a part made up entirely or partially of at least one three-dimensional lattice is disclosed. The three-dimensional lattice is produced by additive manufacturing by successive depositions of different layers of additive manufacturing powder and selective consolidation of the layers of powder along at least one path comprising different manufacturing vectors, the three-dimensional lattice comprising at least two layers of parallel strands that are spaced apart from one another, the strands of one layer extending in a longitudinal direction different from the longitudinal direction in which the strands of another layer extend. The manufacturing method provides that each strand is consolidated only via a plurality of manufacturing vectors extending in the longitudinal direction in which the strand extends.
B22F 10/28 - Fusion sur lit de poudre, p.ex. fusion sélective par laser [FSL] ou fusion par faisceau d’électrons [EBM]
B22F 5/10 - Fabrication de pièces ou d'objets à partir de poudres métalliques caractérisée par la forme particulière du produit à réaliser d'articles avec des cavités ou des trous, non prévue dans les sous-groupes précédents
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
The invention relates to an additive manufacturing machine (4) comprising: - a manufacturing enclosure (49) equipped with a glove box (251); - a powder transport circuit (42); - a power source configured to melt the powder in the manufacturing zone (63); and - a collection circuit (57) configured to collect powder from the transport circuit (42) and transport the collected powder to an outlet of the collection circuit (57), the outlet of the collection circuit being located above a reception zone (281), the reception zone (281) being different from the manufacturing zone (63) and located opposite the outlet of the collection circuit (57), and the gloves (251) being configured to handle an object located in the enclosure (49) and to reach the reception zone (281).
B22F 10/28 - Fusion sur lit de poudre, p.ex. fusion sélective par laser [FSL] ou fusion par faisceau d’électrons [EBM]
B22F 12/00 - Appareils ou dispositifs spécialement adaptés à la fabrication additive; Moyens auxiliaires pour la fabrication additive; Combinaisons d’appareils ou de dispositifs pour la fabrication additive avec d’autres appareils ou dispositifs de traitement ou de fabrication
B33Y 30/00 - Appareils pour la fabrication additive; Leurs parties constitutives ou accessoires à cet effet
B25J 21/02 - Boîtes à gants, c. à d. enceintes dans lesquelles les manipulations sont exécutées par des mains humaines dans des gants faisant partie de la paroi de l'enceinte; Gants de boîtes à gants
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
B29C 64/30 - Opérations ou équipements auxiliaires
The invention relates to a method for the additive manufacture of an object comprising at least one thin wall (22), a thin wall (22) being a wall having a thickness of less than 0.5 millimetre. The object is manufactured by the selective consolidation of different layers of powder placed on top of one another, each layer of powder being selectively consolidated by means of at least one laser beam. The spot of the laser beam traces a continuous or discontinuous path (24) over each layer of powder in order to selectively consolidate this layer of powder. The path of the spot of the laser beam over each layer of powder comprises at least one continuous route (26). At least one thin wall (22) of the object is selectively consolidated in a plurality of layers of powder useful for the manufacture thereof with a single continuous route (26) of the spot of the laser beam in each of these layers of powder or solely with a plurality of continuous routes (26) of the spot of the laser beam, these routes being juxtaposed in each of these layers of powder. The continuous route(s) (26) form(s) a thin wall in a layer of powder that extends over the whole length (L22) of the thin wall in this layer of powder.
B22F 5/10 - Fabrication de pièces ou d'objets à partir de poudres métalliques caractérisée par la forme particulière du produit à réaliser d'articles avec des cavités ou des trous, non prévue dans les sous-groupes précédents
B22F 10/28 - Fusion sur lit de poudre, p.ex. fusion sélective par laser [FSL] ou fusion par faisceau d’électrons [EBM]
B22F 10/366 - Paramètres de balayage, p.ex. distance d’éclosion ou stratégie de balayage
L'AIR LIQUIDE SOCIÉTÉ ANONYME POUR L'ÉTUDE ET L'EXPLOITATION DES PROCÉDÉS GEORGES CLAUDE (France)
AddUP (France)
Inventeur(s)
Doublet, Sébastien
Verna, Eric
Debellemaniere, Olivier
Rosain-Gueu, Marc
Abrégé
A method for purifying a powder including grains and contaminants, includes preparing a suspension including the metal powder and a solvent; then while applying mechanical energy to the suspension; dispersing the grains and the contaminants in the solvent; removing the contaminants and the solvent, and drying the grains under a controlled atmosphere.
C22B 9/02 - Affinage par liquation, filtration, centrifugation, distillation ou action d'ultrasons
C22B 9/10 - Procédés généraux d'affinage ou de refusion des métaux; Appareils pour la refusion des métaux sous laitier électroconducteur ou à l'arc avec des agents d'affinage ou fondants; Emploi de substances pour ces procédés
L'AIR LIQUIDE SOCIÉTÉ ANONYME POUR L'ÉTUDE ET L'EXPLOITATION DES PROCÉDÉS GEORGES CLAUDE (France)
AddUP (France)
Inventeur(s)
Doublet, Sébastien
Verna, Eric
Debellemaniere, Olivier
Abrégé
A method of manufacturing powder from a first and a second materials for use in additive manufacturing, the manufacturing process including melting the first and second materials by an electric arc; spraying the melted materials so as to form droplets; cooling the droplets by a carrier gas so as to form solid particles; separating the solid particles from the carrier gas and collecting the solid particles so as to form the powder; and enriching the droplets and/or the particles by means of an active substance.
B22F 9/08 - Fabrication des poudres métalliques ou de leurs suspensions; Appareils ou dispositifs spécialement adaptés à cet effet par des procédés physiques à partir d'un matériau liquide par coulée, p.ex. à travers de petits orifices ou dans l'eau, par atomisation ou pulvérisation
B05B 7/22 - Appareillages de pulvérisation pour débiter des liquides ou d'autres matériaux fluides provenant de plusieurs sources, p.ex. un liquide et de l'air, une poudre et un gaz comportant des moyens pour chauffer la matière à projeter par voie électrique, p.ex. par un arc
14.
METHOD FOR DETECTING DEFECTS IN AN ADDITIVE MANUFACTURING POWDER LAYER DEPOSITED ON A WORKING AREA
A method for detecting defects in a layer of additive manufacturing powder deposited on a work zone comprises the steps of: i. acquiring an image of a layer of additive manufacturing powder, ii. determining a discrete spectral representation of the image acquired, iii. filtering the discrete spectral representation of the image acquired in frequency terms, iv. determining a filtered image from the filtered discrete spectral representation of the image acquired, and v. analyzing the filtered image so as to detect defects.
A removable calibration plate (10) comprises a sheet (20) comprising an upper face (21) intended to face towards the powerful incident-radiation beam, and bearing a reference marking (30) and being intended to receive a test marking (40), and a lower face (23). The plate (10) comprises an etching layer (22) to be etched by a powerful incident-radiation beam (F),this layer being secured to the upper face (21) of the sheet (20) and opaque to visible light, and being able to be destroyed locally by the powerful incident-radiation beam (F) in order to form the at least one test marking (40), the sheet (20) being transparent to visible light, the lower face (23) of the sheet (20) being frosted.
A removable image-capture apparatus (200) comprises an opening (202) intended to receive a calibration plate (10) bearing a reference marking (30) and possibly a test marking (40). The apparatus (200) comprises a source (204) of backlighting visible light situated beneath the opening (202), a sensor (205) for acquiring an image, in the backlighting visible light, of the plate (10), a guiding and supporting device (206) for positioning the sensor (205) above the opening (202) relative to the surround (201), a calculation device (207) configured to analyze the image, recognize the marking (30) and possibly the marking (40) in the image, and calculate aiming-command corrections intended for a firing system firing a powerful incident-radiation beam, which system belongs to an additive manufacturing apparatus, distinct and separate from the apparatus (200).
The invention relates to a machine for additive manufacturing by powder bed deposition, comprising: o an enclosure (10) comprising a separating wall (23) arranged so as to separate an upper chamber (20) and a lower chamber (30); o an actuator (31) arranged in the lower chamber; o means for depositing a powder material; and o a consolidator (80) for selectively consolidating each powder layer. The upper chamber comprises an opening (21) through which a build sleeve having a build platform (47) can pass, and the machine comprises a transfer system (91) configured to transfer the build sleeve from a manufacturing position to the opening, the transfer system likewise being configured to transfer said build sleeve from the opening to the manufacturing position.
B22F 12/33 - Plate-formes ou substrats de translation dans le plan de dépôt
B33Y 30/00 - Appareils pour la fabrication additive; Leurs parties constitutives ou accessoires à cet effet
B33Y 40/00 - Opérations ou équipements auxiliaires, p.ex. pour la manipulation de matériau
B22F 10/28 - Fusion sur lit de poudre, p.ex. fusion sélective par laser [FSL] ou fusion par faisceau d’électrons [EBM]
B22F 12/00 - Appareils ou dispositifs spécialement adaptés à la fabrication additive; Moyens auxiliaires pour la fabrication additive; Combinaisons d’appareils ou de dispositifs pour la fabrication additive avec d’autres appareils ou dispositifs de traitement ou de fabrication
18.
DEVICE FOR MONITORING AND/OR CONTROLLING THE POWER OF A LASER BEAM FOR ADDITIVE-MANUFACTURING PURPOSES
The invention relates to a device for monitoring and/or controlling the power of a beam (10) emitted by a laser, said beam (10) being configured to melt and/or fuse a starting material in an additive-manufacturing process, said device comprising a semi-reflective mirror (20) arranged so as to sample one portion (11) of the laser beam (10) upstream of the starting material to be melted and/or fused, and an optical detector (60), characterized in that the device further comprises a hollow integrating sphere (50), the optical detector (60) being placed on an interior wall (55) of said integrating sphere (50) so as to measure the light intensity inside said integrating sphere (50), and an optical focusing device (52) arranged so as to focus the sampled portion (11) of the laser beam (10) into the integrating sphere (50), so that the light intensity inside said integrating sphere (50) is proportional to the power of the beam emitted by said laser, a sampling plate (57) configured to sample a sub-portion (111) of the sampled portion (11) of the laser beam, and an optical absorber (51) arranged on a side of the sampling plate (57) opposite the side of this sampling plate that receives the sampled portion (11) of the laser beam and that emits the sub-portion (111) of this sampled portion (11) of the laser beam.
A method for the additive manufacturing of an object from a powder layer comprises the steps of: projecting (200) a beam of energy onto a surface of the layer of powder in the form of a spot so as to melt the powder, scanning (202) the surface with the beam of energy so that the spot travels over the surface in a movement made up of a translation in a longitudinal direction of scanning and of a wobbling movement having at least a component in a direction of wobble, and adjusting (204) the focus of the beam of energy during the scanning according to the translation in the longitudinal direction of scanning but without taking account of the component of the wobbling movement in the direction of wobble.
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
B22F 10/28 - Fusion sur lit de poudre, p.ex. fusion sélective par laser [FSL] ou fusion par faisceau d’électrons [EBM]
B22F 10/366 - Paramètres de balayage, p.ex. distance d’éclosion ou stratégie de balayage
20.
METHOD FOR THE ADDITIVE MANUFACTURE OF AN OBJECT FROM A POWDER LAYER
A method for the additive manufacture of an object from a powder layer comprises the steps of: projection (200) of an energy beam onto a surface of the layer to form a spot; outward scanning (202) by the beam of a first zone of the surface in a longitudinal direction and orientation of the beam so that the spot travels the first zone in a trajectory comprising first loops offset in the longitudinal direction, the spot travelling each first loop in a first rotation sense; and return scanning (204) by the beam of a second zone of the surface in the longitudinal direction and orientation of the beam so that the spot travels the second zone in a trajectory comprising second loops offset in the longitudinal direction, the spot travelling each second loop in a second rotation sense opposite to the first rotation sense.
B33Y 30/00 - Appareils pour la fabrication additive; Leurs parties constitutives ou accessoires à cet effet
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
B29C 64/393 - Acquisition ou traitement de données pour la fabrication additive pour la commande ou la régulation de procédés de fabrication additive
B29C 64/268 - Agencements pour irradiation par faisceaux d’électrons [FE]
21.
METHOD FOR THE ADDITIVE MANUFACTURE OF A COPPER OBJECT
The invention relates to a method for the additive manufacture of a copper object, the method being a method for additive manufacture by powder bed deposition and selective fusion, said object being manufactured by the selective fusion of layers of powder superposed on a support, the selective fusion of a layer of powder being obtained by the movement, referred to as sweeping, of a laser beam over said powder layer, the powder used by the method being made of metal and comprising at least 95% by weight of copper. According to the invention, each zone to be fused of each powder layer is swept at least twice by the laser beam, the first sweep of the laser beam making it possible to create a film of nanoparticles at the surface of the powder present in each zone to be fused, this film of nanoparticles reducing the reflectiveness of the powder in each zone to be fused, and the second sweep of the laser beam fusing the powder in each zone to be fused owing to the presence of the film of nanoparticles created by the first sweep.
B22F 10/364 - Commande ou régulation des opérations des paramètres du faisceau d’énergie pour le post-chauffage, p.ex. pour la refonte
22.
DIRECTED ENERGY DEPOSITION NOZZLE ASSEMBLY WITH NOZZLE AND VIBRATOR THAT VIBRATES NOZZLE, AND DIRECTED ENERGY DEPOSITION APPARATUS HAVING SUCH NOZZLE ASSEMBLY
A directed energy deposition nozzle assembly including (1) a nozzle configured to dispense material for directed energy deposition, wherein the material comprises one or more of metallic powder, ceramic powder, and glass powder, and wherein (a) the nozzle has an orifice through which the material exits the nozzle, wherein the nozzle comprises an inner body and an outer body that is peripherally disposed around the inner body, and wherein the orifice is defined by a gap between the inner body and the outer body, or (b) the nozzle comprises a plurality of orifices through which the material exits the nozzle, and (2) a vibrator configured to apply a vibration to the nozzle.
B05B 15/50 - Aménagements pour le nettoyage; Aménagements pour empêcher les dépôts, le séchage ou un blocage; Aménagements pour détecter une évacuation incorrecte en raison de la présence d’un corps étranger
B05B 7/22 - Appareillages de pulvérisation pour débiter des liquides ou d'autres matériaux fluides provenant de plusieurs sources, p.ex. un liquide et de l'air, une poudre et un gaz comportant des moyens pour chauffer la matière à projeter par voie électrique, p.ex. par un arc
B22F 10/25 - Dépôt direct de particules métalliques, p.ex. dépôt direct de métal [DMD] ou mise en forme par laser [LENS]
B23K 26/144 - Travail par rayon laser, p.ex. soudage, découpage ou perçage en utilisant un écoulement de fluide, p.ex. un jet de gaz, associé au faisceau laser; Buses à cet effet l'écoulement de fluide contenant des particules, p.ex. de la poudre
B23K 26/14 - Travail par rayon laser, p.ex. soudage, découpage ou perçage en utilisant un écoulement de fluide, p.ex. un jet de gaz, associé au faisceau laser; Buses à cet effet
B23K 26/34 - Soudage au laser pour des finalités autres que l’assemblage
B05B 7/14 - Appareillages de pulvérisation pour débiter des liquides ou d'autres matériaux fluides provenant de plusieurs sources, p.ex. un liquide et de l'air, une poudre et un gaz agencés pour projeter des matériaux en particules
23.
MACHINE FOR ADDITIVE MANUFACTURING BY POWDER BED DEPOSITION WITH A CENTRAL GAS SUCTION OR GAS BLOWING MANIFOLD
A machine (10) for additive manufacturing by powder bed deposition comprises a work surface (12), a device (16) for selective consolidation, a device (18) for extracting the fumes, the selective consolidation device emitting at least two beams (F1, F2) of energy or heat. The work surface is divided into at least two work zones (Z1, Z2) adjacent to one another, and a first beam (F1) consolidates the powder in a first work zone (Z1) and a second beam (F2) consolidates the powder in a second work zone (Z2). The fume extraction device (18) comprises at least one central gas suction and/or gas blowing manifold (40) which is mounted to be translationally movable above an overlap zone (ZR) of the different adjacent work zones, and two side gas suction and/or gas blowing manifolds (42, 44) which are fixedly mounted and arranged on either side of the work surface, whcrcin the central manifold (40) extends at least over a maximum dimension of the work surface.
B29C 64/282 - Agencements pour irradiation utilisant des moyens de rayonnement multiples, p.ex. des micro-miroirs ou des diodes électroluminescentes multiples [LED] du même type, p.ex. utilisant des niveaux d’énergie différents
B22F 12/00 - Appareils ou dispositifs spécialement adaptés à la fabrication additive; Moyens auxiliaires pour la fabrication additive; Combinaisons d’appareils ou de dispositifs pour la fabrication additive avec d’autres appareils ou dispositifs de traitement ou de fabrication
B33Y 30/00 - Appareils pour la fabrication additive; Leurs parties constitutives ou accessoires à cet effet
B22F 10/25 - Dépôt direct de particules métalliques, p.ex. dépôt direct de métal [DMD] ou mise en forme par laser [LENS]
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
24.
METHOD FOR DETERMINING ADDITIVE MANUFACTURING PARAMETERS
A method for determining additive manufacturing parameters for the manufacture of an additive manufacturing support (1) for a target part exhibiting an overhang comprises the steps of: (a) additive manufacture of a plurality of supports for each supporting an overhang (2) of a test part (3), each support (1) being associated with a collection of manufacturing parameters and a collection of geometric parameters pertaining to the overhang (2); (b) manufacturing the test part (3) and observing, for each support (1), a collection of mechanical parameters pertaining to the support (1); (c) determining the additive manufacturing parameters for the manufacture of the support (1) of the target part on the basis of the geometric parameters pertaining to the overhang of the target part and of the mechanical parameters pertaining to the support.
B29C 64/386 - Acquisition ou traitement de données pour la fabrication additive
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
B29C 64/40 - Structures de support des objets en 3D pendant la fabrication, lesdites structures devant être sacrifiées après réalisation de la fabrication
B29C 64/268 - Agencements pour irradiation par faisceaux d’électrons [FE]
25.
METHOD FOR CALIBRATING A SENSOR FOR MONITORING A MELT POOL IN AN ADDITIVE MANUFACTURING MACHINE
The invention relates to a method for calibrating a sensor for monitoring a melt pool belonging to a system for monitoring a melt pool of an additive manufacturing machine, the method comprising at least the following steps: - measuring and recording the value of the signal transmitted by the monitoring sensor when it is not exposed to a reference radiation, - exposing the monitoring sensor to the reference radiation, - measuring and recording the value of the signal transmitted by this monitoring sensor when it is exposed to the reference radiation, - calculating a correction coefficient for this monitoring sensor from a reference value associated with the reference radiation and the values of the signal transmitted by this monitoring sensor when it is not subjected to the reference radiation and when it is subjected to the reference radiation, - recording, in a correction table, the correction coefficient specific to this monitoring sensor and the value of the signal transmitted by the monitoring sensor when it is not exposed to a reference radiation.
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
B29C 64/393 - Acquisition ou traitement de données pour la fabrication additive pour la commande ou la régulation de procédés de fabrication additive
B29C 64/268 - Agencements pour irradiation par faisceaux d’électrons [FE]
A supply module (2) for supplying additive manufacturing powder comprises: a main hopper (29) for storing additive manufacturing powder, the main hopper (29) being designed to be connected to a manufacturing module (4) configured to additively manufacture an object from the powder; an inlet (211) of the supply module (2) designed to be connected to the manufacturing module (4) and to receive powder located in the manufacturing module (4); a glovebox (25) being able to be closed in a sealed manner; a provisioning circuit configured to transfer powder located in the glovebox (25) to the main hopper (29); and a circulation system designed to set powder in motion according to a circulation loop closed on itself, the circulation system comprising a suction system (21) designed to evacuate gas present in the circulation loop, the circulation loop passing through the main hopper (29) and the suction system (21).
Provision module (2) for providing additive manufacturing powder, comprising
a main hopper (29) for storing additive manufacturing powder, the main hopper (29) being designed to be connected to a manufacturing module (4) configured to additively manufacture an object from the powder located in the main hopper (29),
an inlet (211) of the provision module (2), which inlet is designed to be connected to the manufacturing module (4) and to receive powder located in the manufacturing module (4),
a glovebox (25) designed to receive a container (28), the glovebox (25) being able to be closed in a sealed manner,
a supply circuit configured to transfer powder located in the glovebox (25) to the main hopper (29),
an extraction circuit that is different from the supply circuit and is configured to transfer additive manufacturing powder from the inlet (211) of the provision module (2) to the container (28), when the container (28) is received in the glovebox (25),
the glovebox (25) comprising gloves (251) for closing the container (28) once it has been filled with powder, while the glovebox (25) is closed.
A device for separating particles contained in a gas stream for selective additive manufacturing and a selective additive manufacturing apparatus are disclosed. The device comprises at least one dry-type aeraulic separator comprising a separating turbine, a speed of rotation of which is variable. The dry-type aeraulic separator selects the particles contained in the gas stream according to a particle size depending on the speed of rotation of the separating turbine. The device also comprises a device for extracting the particles. The dry-type aeraulic separator and the extraction device are in fluidic communication such that a gas stream exiting the dry-type aeraulic separator circulates through the extraction device and such that the gas stream exiting the extraction device circulates through the dry-type aeraulic separator. The device also comprises a device for circulating the gas stream between the dry-type aeraulic separator and the extraction device.
B07B 7/083 - Séparation sélective des matériaux solides portés par des courants de gaz, ou dispersés dans ceux-ci utilisant la force centrifuge produite par la rotation d'ailettes, de disques, de tambours ou de brosses
B33Y 40/00 - Opérations ou équipements auxiliaires, p.ex. pour la manipulation de matériau
B01D 46/02 - Séparateurs de particules comportant des filtres creux faits en un matériau souple, p.ex. appareils de précipitation de poussières
B01D 45/16 - Séparation de particules dispersées dans des gaz ou des vapeurs par gravité, inertie ou force centrifuge en utilisant la force centrifuge produite par le mouvement hélicoïdal du courant gazeux
B01D 50/20 - Combinaisons de dispositifs couverts par les groupes et
B07B 7/10 - Séparation sélective des matériaux solides portés par des courants de gaz, ou dispersés dans ceux-ci utilisant la force centrifuge l'air étant recyclé à l'intérieur de l'appareil
B07B 9/02 - Combinaisons d'appareils semblables ou différents, pour séparer les solides, par utilisation de courants de gaz
29.
ADAPTIVE PATH FOR ADDITIVE MANUFACTURING USING A LASER SOURCE
A method (P) for determining trajectory followed by a laser beam for selective additive manufacture of a three-dimensional object comprises: a) determining, on a predetermined reference path (Ti), a plurality of reference points (Tij), b) determining a plurality of adjacent points (Ti+1j) located on the same side of the reference path, each adjacent point (Ti+1j) being associated with a reference point (Tij) and being such that a simulated adjacent melt zone that surrounds said adjacent point (Ti+1j) and a simulated reference melt zone that surrounds the reference point (Tij) have an overlap corresponding to a fraction of a transverse width of the simulated reference melt zone that is comprised between a predetermined minimum fraction (αmin) and a predetermined maximum fraction (αmax), c) determining an adjacent path (Ti+1) passing through the plurality of determined adjacent points, and d) iterating steps a) to c) using the adjacent path, defined as a new reference path, so as to determine, on each iteration, a new adjacent path, all of the adjacent paths thus determined defining the trajectory.
The present invention relates to an additive manufacturing support (1) comprising, on a plate of an additive manufacturing machine, a stack produced by additive manufacturing, having:
on the one hand, a breakable zone with a structure suitable for holding, during its manufacture, a part (100) intended to be produced by additive manufacturing, and
on the other hand, between the plate and the zone with a breakable structure, an intermediate zone with a porous structure.
B22F 10/47 - Structures destinées à soutenir des pièces ou des articles pendant la fabrication et retirées par la suite caractérisées par des caractéristiques structurelles
31.
METHOD FOR SEGMENTING A PART COMPRISING A PLURALITY OF THIN ELEMENTS SEPARATED BY INTERSTICES
The invention relates to a method for segmenting a part (10) comprising a plurality of thin elements (12) separated by interstices (30), the thin elements being in the form of thin walls (14) having a thickness of less than 1 millimetre and/or thin strands having a cross-section of less than 4 square millimetres. The method comprises the following steps, in order: a) filling the interstices located between the thin elements of the part to be segmented with a filling material, b) segmenting the part into a plurality of portions by segmenting said thin elements, c) removing the filling material from the segmented portions.
A machine for additive manufacturing comprises a work top, a work area, a device for depositing a layer of powder onto the work area and a heat or energy source used to selectively consolidate a layer of powder, the device comprising a movable element for receiving powder moving relative to the work top and in the vicinity of the work area, a device for dispensing a bead of powder onto the movable element and a device for spreading the bead of powder. The movable element assuming the form of a translationally movable slide or the movable element rotationally moving around the work area, at least part of the upper surface of a movable element is located above the upper surface of the work top and/or at least part of the upper surface of a movable element is located below the upper surface of the work top.
B22F 10/28 - Fusion sur lit de poudre, p.ex. fusion sélective par laser [FSL] ou fusion par faisceau d’électrons [EBM]
B22F 12/50 - Moyens d’alimentation en matériau, p.ex. têtes
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
B29C 64/236 - Moyens d’entraînement pour un mouvement dans une direction dans le plan d’une couche
A powder bed fusion additive manufacturing machine (10) comprises a working area (20) able to receive a superposition of different layers of powder, a device (30) for depositing a layer of powder onto the working area and a consolidation source (40) used to selectively consolidate each layer of powder deposited onto the working area, the device for depositing a layer of powder comprising a powder reservoir (32) able to be positioned above the working area, and a powder distribution opening being provided in the bottom part of the reservoir, the device for depositing a layer of powder comprising a vibrating device (68) able to subject the reservoir to vibrations, and the powder distribution opening of the reservoir being equipped with a sieve. The reservoir is mounted on a weighing sensor.
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS) (France)
UNIVERSITE PARIS-SACLAY (France)
Inventeur(s)
Minea, Tiberiu
Walrand, Gilles
Ballage, Charles
Antunes, Vinicius
Abrégé
The present invention relates to an additive manufacturing machine (1) comprising: an enclosure (2); a source of energy beams (20) for selectively scanning a powder bed (3a) and consolidating it; an optical element (4) secured in the enclosure (2) and made from a material transparent to electromagnetic waves, the optical element (4) having a surface (5) on which a deposit (7) originating from vaporisation of the powder bed (3a) is able to form; and a system (8) for cleaning the surface (5) of the optical element (4) comprising a plasma generator (11), the plasma generator (11) comprising a power electrode (9), placed facing an opposite surface (6) of the optical element (4), and an earth electrode (10) for generating a plasma (11) by capacitive coupling close to the first surface (5).
B22F 10/28 - Fusion sur lit de poudre, p.ex. fusion sélective par laser [FSL] ou fusion par faisceau d’électrons [EBM]
B22F 12/90 - Moyens de commande ou de régulation des opérations, p.ex. caméras ou capteurs
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
A powder dispensing head (1) for an additive manufacturing machine comprises a through-opening designed to allow the passage of a high-energy beam towards the melting point, a body (2) comprising N powder conveying ducts uniformly distributed about the through-opening and converging towards the melting point, a dispensing member (3) comprising a powder dispensing chamber having a powder inlet, and N powder outlets uniformly distributed about the through-opening, the body (2) and the dispensing member (3) being configured to be able to move relative to one another so as to fluidically connect or disconnect the powder outlets with respect to the respective powder conveying ducts according to the relative position of the dispensing member (3) with respect to the body (2).
B23K 26/14 - Travail par rayon laser, p.ex. soudage, découpage ou perçage en utilisant un écoulement de fluide, p.ex. un jet de gaz, associé au faisceau laser; Buses à cet effet
L'AIR LIQUIDE SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE (France)
Inventeur(s)
Doublet, Sebastien
Verna, Eric
Debellemaniere, Olivier
Abrégé
An aspect of the invention concerns a method for manufacturing powder (5) from first and second materials (1a, 1b), intended to be used in the field of additive manufacturing, the manufacturing method comprising: - a step of melting the first and second materials (1a, 1b), by means of an electric arc (314); - a step of spraying the molten materials (1a, 1b) so as to form droplets (2); - a step of cooling the droplets (2) by means of a carrier gas (11) so as to form solid particles (3); - a step of separating the solid particles from the carrier gas (11) and of collecting the solid particles (3) so as to form the powder (5); and - a step of enriching the droplets (2) and/or the particles (3) by means of an active substance (16).
B22F 1/00 - Poudres métalliques; Traitement des poudres métalliques, p.ex. en vue de faciliter leur mise en œuvre ou d'améliorer leurs propriétés
B22F 9/08 - Fabrication des poudres métalliques ou de leurs suspensions; Appareils ou dispositifs spécialement adaptés à cet effet par des procédés physiques à partir d'un matériau liquide par coulée, p.ex. à travers de petits orifices ou dans l'eau, par atomisation ou pulvérisation
L'AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PRO... (France)
ADDUP (France)
Inventeur(s)
Doublet, Sebastien
Verna, Eric
Debellemaniere, Olivier
Rosain-Gueu, Marc
Abrégé
One aspect of the invention concerns a method (101) for purifying a powder (10) containing grains (1) and contaminants (2), comprising: - a step of preparing (120) a suspension (4) containing the powder (10) and a solvent (3); - then applying a mechanical energy (5) to the suspension (4); - a step of dispersing (130) the grains (1) and the contaminants (2) in the solvent (3); - a step of removing (140) the contaminants (2) and the solvent (3); - a step of drying (150) the grains (1) in a controlled atmosphere.
L'AIR LIQUIDE SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE (France)
Inventeur(s)
Doublet, Sebastien
Verna, Eric
Debellemaniere, Olivier
Abrégé
One aspect of the invention relates to a method for manufacturing powder (5) from first and second materials (1a, 1b), said powder being intended to be used in the field of additive manufacturing, the manufacturing method comprising: - a step of melting first and second materials (1a, 1b), by means of an electric arc (314); - a step of spraying the molten materials (1a, 1b) so as to form droplets (2); - a step of cooling the droplets (2) by means of a carrier gas (11) so as to form solid particles (3); - a step of separating the solid particles from the carrier gas (11) and of collecting the solid particles (3) so as to form the powder (5); and - a step of enriching the droplets (2) and/or particles (3) by means of an active substance (16).
B22F 1/00 - Poudres métalliques; Traitement des poudres métalliques, p.ex. en vue de faciliter leur mise en œuvre ou d'améliorer leurs propriétés
B22F 9/08 - Fabrication des poudres métalliques ou de leurs suspensions; Appareils ou dispositifs spécialement adaptés à cet effet par des procédés physiques à partir d'un matériau liquide par coulée, p.ex. à travers de petits orifices ou dans l'eau, par atomisation ou pulvérisation
Centre National De La Recherche Scientifique (CNRS) (France)
Ecole Normale Superieure Paris-Saclay (France)
Inventeur(s)
Walrand, Gilles
Tournier, Christophe
Lavernhe, Sylvain
Ettaieb, Kamel
Abrégé
A process for the selective additive manufacture of a three-dimensional object from a layer of powder comprises: applying a layer of additive manufacturing powder to a support or to a previously consolidated layer, emitting a laser beam onto a first point of the layer of additive manufacturing powder so as to consolidate a first zone of the layer of powder comprising the first point, adjusting a power of the laser beam depending on an estimated temperature variation of the layer of powder at a second point, separate from the first point, and emitting a laser beam onto the second point with the adjusted power so as to consolidate a second zone of the layer of powder comprising the second point, the emission of the laser beam onto the first point and onto the second point being temporally separated by the predetermined time interval.
B22F 12/00 - Appareils ou dispositifs spécialement adaptés à la fabrication additive; Moyens auxiliaires pour la fabrication additive; Combinaisons d’appareils ou de dispositifs pour la fabrication additive avec d’autres appareils ou dispositifs de traitement ou de fabrication
B33Y 30/00 - Appareils pour la fabrication additive; Leurs parties constitutives ou accessoires à cet effet
B33Y 50/02 - Acquisition ou traitement de données pour la fabrication additive pour la commande ou la régulation de procédés de fabrication additive
B22F 10/36 - Commande ou régulation des opérations des paramètres du faisceau d’énergie
40.
Manufacturing chamber for an additive manufacturing machine
A manufacturing chamber for an additive manufacturing machine comprises in an enclosure: a working plane; a manufacturing platform for the deposition of the layers of additive manufacturing material and for supporting the part being manufactured; and a circuit for circulating an inert gas flow over the manufacturing platform, characterized in that the enclosure and/or the working plane comprises an inlet opening for the gas flow, in that the working plane comprises an upstream ramp, connected to the area of the working plane where the manufacturing platform is located by a surface having a rounded convex profile, and in that the surface with a rounded convex profile is configured for attaching the gas flow, by the Coanda effect, above the working plane.
B22F 10/28 - Fusion sur lit de poudre, p.ex. fusion sélective par laser [FSL] ou fusion par faisceau d’électrons [EBM]
B22F 10/322 - Commande ou régulation des opérations de l’atmosphère, p.ex. de la composition ou de la pression dans une chambre de fabrication d’un écoulement de gaz, p.ex. du débit ou de la direction
B22F 12/00 - Appareils ou dispositifs spécialement adaptés à la fabrication additive; Moyens auxiliaires pour la fabrication additive; Combinaisons d’appareils ou de dispositifs pour la fabrication additive avec d’autres appareils ou dispositifs de traitement ou de fabrication
The present invention relates to a method for detecting defects in an additive manufacturing powder layer deposited on a working area, comprising the steps of: i. acquiring an image of an additive manufacturing powder layer, ii. determining a discrete spectral representation of the acquired image, iii. frequency filtering of the discrete spectral representation of the acquired image, iv. determining a filtered image from the filtered discrete spectral representation of the acquired image, v. analysing the filtered image so as to detect defects.
B33Y 50/00 - Acquisition ou traitement de données pour la fabrication additive
B29C 64/386 - Acquisition ou traitement de données pour la fabrication additive
B33Y 30/00 - Appareils pour la fabrication additive; Leurs parties constitutives ou accessoires à cet effet
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
b) which passes through the thickness of the nut from an external surface of the nut (1) to the internal surface (5) of the tapped hole (2) and which extends along a plane passing through the first axis (A) over at least one thread pitch (6) of the tapped hole (2).
B22F 10/28 - Fusion sur lit de poudre, p.ex. fusion sélective par laser [FSL] ou fusion par faisceau d’électrons [EBM]
B22F 12/00 - Appareils ou dispositifs spécialement adaptés à la fabrication additive; Moyens auxiliaires pour la fabrication additive; Combinaisons d’appareils ou de dispositifs pour la fabrication additive avec d’autres appareils ou dispositifs de traitement ou de fabrication
B22F 12/50 - Moyens d’alimentation en matériau, p.ex. têtes
B33Y 30/00 - Appareils pour la fabrication additive; Leurs parties constitutives ou accessoires à cet effet
F16B 37/08 - DISPOSITIFS POUR ASSEMBLER OU BLOQUER LES ÉLÉMENTS DE CONSTRUCTION OU LES PARTIES DE MACHINES, p.ex. CLOUS, CHEVILLES, ÉCROUS, VIS, BOULONS, BAGUES ANNULAIRES FORMANT RESSORT, BRIDES OU COLLIERS, CLIPS OU PINCES, COINS; ASSEMBLAGES OU JOINTURES Écrous ou pièces similaires avec entrées de filetage Écrous mobiles le long du boulon après basculement de l’écrou
An additive manufacturing machine (10) comprises a working plane (18) comprising a working zone (20) allowing an overlay of different layers of powder to be received, and a powder dispensing device (32) comprising a powder intake (36) allowing powder to be delivered on top of the working plane. The powder dispensing device (32) comprises a tank (44) of powder mounted to move above the working plane (18) and that can be displaced to under the powder intake (36), the bottom part (45) of the tank (44) comprises a powder dispensing point (P1), and the powder dispensing device (32) comprises a control device (48) controlling the flow of powder via the powder dispensing point during a displacement of the tank. The tank (44) is mounted on a weighing sensor (68).
The invention relates to a removable image-capturing apparatus (200) comprising an aperture (202) intended to receive a calibration plate (10) bearing a reference marking (30) and potentially a test marking (40). According to the invention, the apparatus (200) comprises a backlighting source (204) emitting light in the visible range and located under the aperture (202), a sensor (205) for acquiring an image of the plate (10) backlit with visible light, a guiding and holding device (206) for positioning the sensor (205) above the aperture (202) with respect to the frame (201), a computer (207) configured to analyse the image, recognise the marking (30) and potentially the marking (40) in the image and compute targeting-command corrections intended for a system for firing an incident beam of radiant power from an additive manufacturing apparatus, which is separate and distinct from the apparatus (200).
B22F 3/105 - Frittage seul en utilisant un courant électrique, un rayonnement laser ou un plasma
G05B 19/401 - Commande numérique (CN), c.à d. machines fonctionnant automatiquement, en particulier machines-outils, p.ex. dans un milieu de fabrication industriel, afin d'effectuer un positionnement, un mouvement ou des actions coordonnées au moyen de données d'u caractérisée par des dispositions de commande pour la mesure, p.ex. étalonnage et initialisation, mesure de la pièce à usiner à des fins d'usinage
B33Y 50/02 - Acquisition ou traitement de données pour la fabrication additive pour la commande ou la régulation de procédés de fabrication additive
B29C 64/393 - Acquisition ou traitement de données pour la fabrication additive pour la commande ou la régulation de procédés de fabrication additive
B23K 26/04 - Alignement, pointage ou focalisation automatique du faisceau laser, p.ex. en utilisant la lumière rétrodiffusée
B23K 26/346 - Travail par rayon laser, p.ex. soudage, découpage ou perçage en combinaison avec du soudage ou du découpage couvert par les groupes , p.ex. en combinaison avec le soudage par résistance
B33Y 40/00 - Opérations ou équipements auxiliaires, p.ex. pour la manipulation de matériau
B33Y 50/00 - Acquisition ou traitement de données pour la fabrication additive
B22F 10/31 - Commande ou régulation des opérations Étalonnage des étapes de procédé ou réglages des appareils, p.ex. avant ou en cours de fabrication
B23K 31/12 - Procédés relevant de la présente sous-classe, spécialement adaptés à des objets ou des buts particuliers, mais non couverts par un seul des groupes principaux relatifs à la recherche des propriétés, p.ex. de soudabilité, des matériaux
B23K 37/00 - Dispositifs ou procédés auxiliaires non spécialement adaptés à un procédé couvert par un seul des autres groupes principaux de la présente sous-classe
The present invention relates to a removable calibration plate (10), comprising a pane (20) having an upper face (21), intended to be turned toward the incident beam of radiant power and bearing a reference marking (30) and being intended to receive a test marking (40), and a lower face (23). According to the invention, the plate (10) comprises a layer (22) for etching by the incident beam (F) of radiant power, which layer is securely fastened to the upper face (21) of the pane (20) and opaque to visible light, and able to be destroyed locally by the incident beam (F) of radiant power in order to form the at least one test marking (40), the pane (20) being transparent to visible light, the lower face (23) of the pane (20) being ground.
B22F 3/105 - Frittage seul en utilisant un courant électrique, un rayonnement laser ou un plasma
G05B 19/401 - Commande numérique (CN), c.à d. machines fonctionnant automatiquement, en particulier machines-outils, p.ex. dans un milieu de fabrication industriel, afin d'effectuer un positionnement, un mouvement ou des actions coordonnées au moyen de données d'u caractérisée par des dispositions de commande pour la mesure, p.ex. étalonnage et initialisation, mesure de la pièce à usiner à des fins d'usinage
B33Y 50/02 - Acquisition ou traitement de données pour la fabrication additive pour la commande ou la régulation de procédés de fabrication additive
B29C 64/393 - Acquisition ou traitement de données pour la fabrication additive pour la commande ou la régulation de procédés de fabrication additive
B23K 26/04 - Alignement, pointage ou focalisation automatique du faisceau laser, p.ex. en utilisant la lumière rétrodiffusée
B23K 26/346 - Travail par rayon laser, p.ex. soudage, découpage ou perçage en combinaison avec du soudage ou du découpage couvert par les groupes , p.ex. en combinaison avec le soudage par résistance
B33Y 40/00 - Opérations ou équipements auxiliaires, p.ex. pour la manipulation de matériau
B33Y 50/00 - Acquisition ou traitement de données pour la fabrication additive
B22F 10/31 - Commande ou régulation des opérations Étalonnage des étapes de procédé ou réglages des appareils, p.ex. avant ou en cours de fabrication
B23K 31/12 - Procédés relevant de la présente sous-classe, spécialement adaptés à des objets ou des buts particuliers, mais non couverts par un seul des groupes principaux relatifs à la recherche des propriétés, p.ex. de soudabilité, des matériaux
B23K 37/00 - Dispositifs ou procédés auxiliaires non spécialement adaptés à un procédé couvert par un seul des autres groupes principaux de la présente sous-classe
46.
METHOD FOR THE ADDITIVE MANUFACTURE OF AN OBJECT FROM A POWDER LAYER
Disclosed is a method for the additive manufacture of an object from a powder layer, the method comprising steps of: projecting (200) an energy beam as a spot onto a surface of the layer; outward scanning (202) by the beam of a first zone of the surface in a longitudinal direction, and orientation of the beam so that the spot traverses the first zone along a path comprising first loops offset in the longitudinal direction, the spot traversing each first loop in a first direction of rotation; return scanning (204) by the beam of a second zone of the surface in the longitudinal direction, and orientation of the beam so that the spot traverses the second zone along a path comprising second loops offset in the longitudinal direction, the spot traversing each second loop in a second direction of rotation opposite the first direction of rotation.
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
Disclosed is a method for the additive manufacture of an object from a powder layer, the method comprising steps of: projecting (200) an energy beam as a spot onto a surface of the powder layer so as to fuse the powder; scanning (202) the surface with the energy beam so that the spot moves on the surface in a movement composed of a translation in a longitudinal scanning direction and an oscillatory motion having at least one component in an oscillation direction; adjusting (204) a focus of the energy beam during scanning according to the translation in the longitudinal scanning direction but without taking the component of the oscillatory motion in the oscillating direction into account.
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
The invention relates to a device (100) for detecting the position of a laser beam (15) with a predetermined diameter and emitted by a laser of an additive manufacturing machine, said detection device (100) comprising an upper portion (102) comprising a scanning zone (108) of the laser beam (15), said scanning zone (108) comprising, at the centre thereof, a circular hole (111) with a diameter substantially equal to the diameter of the laser beam and with a predetermined position; the detection device (100) comprising a lower portion (103), the lower portion (103) comprising at least one sensor (114) for collecting a portion of the energy transmitted by the laser beam (15); so that when the laser beam (15) scans the scanning zone (108) from a plurality of positions, the sensor (114) collects a portion of the energy transmitted by the laser beam from each position, the portion of the transmitted energy being maximum when the laser beam (15) is aligned with the circular hole (111).
A powder bed fusion additive manufacturing machine (10) comprises: a manufacturing chamber (12), at least one mobile powder-receiving surface (28) and a manufacturing zone (20) situated inside the manufacturing chamber, a powder-spreading device (30), and at least one powder-distribution device (32) distributing powder over the mobile receiving surface. The distribution device comprises a buffer reservoir (40) connected to a powder supply (42), and a powder-distribution point (P1) beneath which a mobile receiving surface (28) moves, and the powder-distribution device comprises a screw-type metering device (44) connecting the buffer reservoir (40) and the powder-distribution point (P1) and enabling the generation of a continuous stream of powder from the buffer reservoir towards the powder-distribution point.
Method for preparing the upper surface of a build platform for additive manufacturing by powder bed deposition, the method comprises at least one step of increasing the roughness of at least one region of the upper surface of the build platform by imprinting a pattern onto this region. The imprinting of the pattern is done inside the machine for additive manufacturing by powder bed deposition in which the build platform is subsequently used for additive manufacturing by powder bed deposition.
B22F 10/28 - Fusion sur lit de poudre, p.ex. fusion sélective par laser [FSL] ou fusion par faisceau d’électrons [EBM]
B33Y 70/00 - Matériaux spécialement adaptés à la fabrication additive
B33Y 80/00 - Produits obtenus par fabrication additive
B22F 1/00 - Poudres métalliques; Traitement des poudres métalliques, p.ex. en vue de faciliter leur mise en œuvre ou d'améliorer leurs propriétés
B22F 10/64 - Traitement de pièces ou d'articles après leur formation par des moyens thermiques
B23K 26/352 - Travail par rayon laser, p.ex. soudage, découpage ou perçage pour le traitement de surface
B33Y 30/00 - Appareils pour la fabrication additive; Leurs parties constitutives ou accessoires à cet effet
B23K 26/359 - Travail par rayon laser, p.ex. soudage, découpage ou perçage pour le traitement de surface en formant une ligne ou un motif linéaire, p.ex. une ligne en pointillés d'amorce de rupture
B23K 26/144 - Travail par rayon laser, p.ex. soudage, découpage ou perçage en utilisant un écoulement de fluide, p.ex. un jet de gaz, associé au faisceau laser; Buses à cet effet l'écoulement de fluide contenant des particules, p.ex. de la poudre
The invention relates to an additive manufacturing module (10) for an additive manufacturing machine, the module comprising a holder (12) intended to be attached to an additive manufacturing machine and a manufacturing assembly (14) removably mounted in the holder, the manufacturing assembly comprising a telescopic sleeve (16) with a base (18) intended to be connected to an actuator, a manufacturing jacket (20) and a manufacturing plate (22), the telescopic sleeve comprising an upper strand (24) removably secured to the holder and a lower strand (26) secured to the base, the manufacturing jacket being mounted inside the sleeve and removably secured to the upper strand of the telescopic sleeve, the manufacturing plate being slidably mounted inside the manufacturing jacket and being connected to the base by an extension (30) removably attached to the base and to the plate, first powder-tight means (32) being provided between the manufacturing plate and the manufacturing jacket.
B33Y 30/00 - Appareils pour la fabrication additive; Leurs parties constitutives ou accessoires à cet effet
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
B29C 64/259 - Enceintes pour le matériau de construction, p.ex. récipients pour poudre interchangeables
B22F 10/28 - Fusion sur lit de poudre, p.ex. fusion sélective par laser [FSL] ou fusion par faisceau d’électrons [EBM]
B22F 12/17 - Moyens de chauffage auxiliaires pour chauffer la chambre ou la plate-forme de formation
B22F 12/00 - Appareils ou dispositifs spécialement adaptés à la fabrication additive; Moyens auxiliaires pour la fabrication additive; Combinaisons d’appareils ou de dispositifs pour la fabrication additive avec d’autres appareils ou dispositifs de traitement ou de fabrication
B29C 64/232 - Moyens d’entraînement pour un mouvement le long de l'axe orthogonal au plan d’une couche
52.
MACHINE FOR ADDITIVE MANUFACTURING BY POWDER BED DEPOSITION WITH A CENTRAL GAS SUCTION OR GAS BLOWING MANIFOLD
The invention relates to a machine (10) for additive manufacturing by powder bed deposition, the machine comprising a working surface (12) on which at least one layer of additive manufacturing powder (14) is deposited, the machine comprising a device (16) for selective consolidation by complete or partial melting of a layer of powder deposited on the working surface, and the machine comprising a device (18) for extracting the fumes created by the selective consolidation of a powder layer, wherein the selective consolidation device emits at least two beams (F1, F2) of energy or heat in the direction of the working surface, the working surface is divided into at least two adjoining work areas (Z1, Z2), and a first beam (F1) consolidates the powder in a first work area (Z1) and a second beam (F2) consolidates the powder in a second work area (Z2). The fume extraction device (18) comprises at least one central gas suction and/or gas blowing manifold (40) mounted so as to be translatably movable above an overlapping area (ZR) in which the different adjoining work areas overlap, and two lateral gas suction and/or gas blowing manifolds (42, 44) fixedly attached and arranged on either side of the working surface. The central manifold (40) extends at least over a maximum area of the working surface (12) in a transverse direction (DT) and moves translationally in a longitudinal direction (DL) perpendicular to the transverse direction, wherein the longitudinal and transverse directions are parallel to the plane (P12) of the working surface and the powder surface.
B22F 3/105 - Frittage seul en utilisant un courant électrique, un rayonnement laser ou un plasma
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
B29C 64/236 - Moyens d’entraînement pour un mouvement dans une direction dans le plan d’une couche
B29C 64/268 - Agencements pour irradiation par faisceaux d’électrons [FE]
B29C 64/277 - Agencements pour irradiation utilisant des moyens de rayonnement multiples, p.ex. des micro-miroirs ou des diodes électroluminescentes multiples [LED]
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS) (France)
UNIVERSITE PARIS-SACLAY (France)
Inventeur(s)
Minea, Tiberiu
Walrand, Gilles
Effernelli, Albin
Crespi, Ângela Elisa
Abrégé
The invention relates to an additive manufacturing process by selective melting of metal or ceramic powder, comprising the steps of: - depositing a layer (C) of powder; - selectively melting at least one area of the powder layer, wherein the process comprises, after the deposition step and prior to the selective melting step, a coating step during which grains of metal or ceramic powder (1) are at least partially covered with a layer of an addition material (2), the grains of metal or ceramic powder (1) having a first reflectivity, and the addition material (2) having a second reflectivity that is lower than the first reflectivity.
B22F 1/00 - Poudres métalliques; Traitement des poudres métalliques, p.ex. en vue de faciliter leur mise en œuvre ou d'améliorer leurs propriétés
B22F 1/02 - Traitement particulier des poudres métalliques, p.ex. en vue de faciliter leur mise en œuvre, d'améliorer leurs propriétés; Poudres métalliques en soi, p.ex. mélanges de particules de compositions différentes comportant un enrobage des particules
B22F 3/105 - Frittage seul en utilisant un courant électrique, un rayonnement laser ou un plasma
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
B22F 10/34 - Commande ou régulation des opérations des caractéristiques de la poudre, p.ex. densité, oxydation ou fluidité
B22F 10/50 - Traitement des pièces ou des articles pendant leur formation, p.ex. traitements appliqués aux couches fusionnées pendant leur formation
B22F 10/28 - Fusion sur lit de poudre, p.ex. fusion sélective par laser [FSL] ou fusion par faisceau d’électrons [EBM]
B29C 64/194 - Procédés de fabrication additive impliquant des opérations supplémentaires effectuées sur les couches ajoutées, p.ex. lissage, meulage ou contrôle d’épaisseur pendant l’empilage des couches
B29C 64/20 - Fabrication additive, c. à d. fabrication d’objets en trois dimensions [3D] par dépôt additif, agglomération additive ou stratification additive, p.ex. par impression en 3D, stéréolithographie ou frittage laser sélectif - Détails ou accessoires à cet effet
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS) (France)
UNIVERSITE PARIS-SACLAY (France)
Inventeur(s)
Minea, Tiberiu
Lecoeur, Philippe
Walrand, Gilles
Abrégé
The invention relates to a method of surface treatment in order to constitute an active filter (21) for a reactive compound of a gas mixture, the method comprising a step of depositing at least one layer of an absorbing material on the surface of a support, the deposition step being carried out by sputtering of an electrode (7) comprising at least one absorbing material chosen to react with the reactive compound of the gas mixture.
C23C 14/56 - Appareillage spécialement adapté au revêtement en continu; Dispositifs pour maintenir le vide, p.ex. fermeture étanche
C23C 14/16 - Matériau métallique, bore ou silicium sur des substrats métalliques, en bore ou en silicium
B22F 3/105 - Frittage seul en utilisant un courant électrique, un rayonnement laser ou un plasma
B29C 64/00 - Fabrication additive, c. à d. fabrication d’objets en trois dimensions [3D] par dépôt additif, agglomération additive ou stratification additive, p.ex. par impression en 3D, stéréolithographie ou frittage laser sélectif
B33Y 30/00 - Appareils pour la fabrication additive; Leurs parties constitutives ou accessoires à cet effet
H01J 37/32 - Tubes à décharge en atmosphère gazeuse
55.
IN-SITU POWDER TREATMENT FOR ADDITIVE MANUFACTURING IN ORDER TO IMPROVE THE THERMAL AND/OR ELECTRICAL CONDUCTIVITY OF THE POWDER
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS) (France)
UNIVERSITE PARIS-SACLAY (France)
Inventeur(s)
Minea, Tiberiu
Walrand, Gilles
Effernelli, Albin
Crespi, Ângela Elisa
Ballage, Charles
Abrégé
The additive manufacturing process by selective melting of metal or ceramic powder comprises the steps of: - depositing a powder layer (C), and - selectively melting at least one area of the powder layer. The process comprises, after the deposition step and prior to the selective melting step, a coating step during which grains of the powder layer (1) are at least partially covered with a film of an addition material (2), the powder grains (1) having a first electrical conductivity, and the addition material (2) having a second electrical conductivity greater than or equal to the first conductivity, wherein the film of addition material has a thickness of no more than 1 µm.
B22F 1/00 - Poudres métalliques; Traitement des poudres métalliques, p.ex. en vue de faciliter leur mise en œuvre ou d'améliorer leurs propriétés
B22F 1/02 - Traitement particulier des poudres métalliques, p.ex. en vue de faciliter leur mise en œuvre, d'améliorer leurs propriétés; Poudres métalliques en soi, p.ex. mélanges de particules de compositions différentes comportant un enrobage des particules
B22F 3/105 - Frittage seul en utilisant un courant électrique, un rayonnement laser ou un plasma
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
An apparatus for manufacturing a three-dimensional object by selective additive manufacturing comprises: a support (140) suitable for supporting at least one layer (150) of additive manufacturing powder, a laser source (110) suitable for emitting a laser beam (111), a scanning device (130) suitable for directing the laser beam onto the powder layer so as to scan at least a portion of the powder layer, and a device (120) for modulating the scanning trajectory, arranged upstream of the scanning device, the modulating device comprising a modulating mirror (121) suitable for reflecting the laser beam emitted by the laser source and for directing it towards the scanning device, the angle of incidence of the laser beam emitted by the laser source on the modulating mirror being between 20 and 45°.
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
B22F 10/28 - Fusion sur lit de poudre, p.ex. fusion sélective par laser [FSL] ou fusion par faisceau d’électrons [EBM]
B22F 10/36 - Commande ou régulation des opérations des paramètres du faisceau d’énergie
B22F 10/366 - Paramètres de balayage, p.ex. distance d’éclosion ou stratégie de balayage
B22F 10/85 - Acquisition ou traitement des données pour la commande ou la régulation de procédés de fabrication additive
B22F 12/41 - Moyens de rayonnement caractérisés par le type, p.ex. laser ou faisceau d’électrons
B22F 12/44 - Moyens de rayonnement caractérisés par la configuration des moyens de rayonnement
An inertable container (10) for transporting an additive manufacturing powder comprises an inertable volume (12) and a main opening (14) granting access to the inside of this inertable volume, the inertable volume (12) comprising an upper portion (16) and a lower portion (18), the main opening (14) being located in the lower portion (18) of the inertable volume, and the section (S12) of the inertable volume (12) increasing gradually over at least part of the height (H10) of the container (10) and from the lower portion (18) towards the upper portion (16) of the inertable volume. The main opening is equipped with a passive half-valve (20) allowing this main opening (14) to be closed in such a way as to be sealed in an airtight and humidity-proof manner. The container comprises at least two inerting tappings.
B22F 12/86 - Traitement ou fabrication en série avec plusieurs dispositifs groupés
B29C 64/307 - Manipulation du matériau destiné à être utilisé en fabrication additive
B33Y 40/00 - Opérations ou équipements auxiliaires, p.ex. pour la manipulation de matériau
B65D 81/20 - Réceptacles, éléments d'emballage ou paquets pour contenus présentant des problèmes particuliers de stockage ou de transport ou adaptés pour servir à d'autres fins que l'emballage après avoir été vidés de leur contenu fournissant une ambiance spécifique pour le contenu, p.ex. température supérieure ou inférieure à la température ambiante sous vide ou pression superatmosphérique ou en atmosphère spéciale, p.ex. sous gaz inerte
B65D 81/24 - Adaptations pour empêcher la détérioration ou l'altération du contenu; Applications au réceptacle ou au matériau d'emballage d'agents de conservation des aliments, de fongicides, d'insecticides ou de produits repoussant les animaux
The present invention relates to a gas filtration device (1) for an additive manufacturing apparatus, the filtration device (1) comprising a column (3) with plates (31) which is designed to bring a gas (A) to be filtered into contact with a filtration fluid (B), the column (3) comprising: - a first end region (32) which comprises an inlet (33) for the clean fluid (B1) in the liquid phase and an outlet (34) for filtered gas (A2), - a second end region (36) which comprises an inlet (37) for gas (A1) which is charged with particles in suspension and an outlet (38) for the fluid (B2) which is charged with the particles in suspension, - an intermediate region (39) which comprises means for bringing the fluid (B) in the liquid phase and the gas (A) into contact, the device (1) further comprising a device for recycling (53) the fluid (B2) which is charged with particles in suspension in order to capture the particles in suspension in the filtration fluid so as to reclaim it as clean fluid (B1).
Module (2) for supplying additive manufacturing powder, comprising - a main hopper (29) for storing the additive manufacturing powder, the main hopper (29) being designed to be connected to a manufacturing module (4) configured to manufacture an object from the powder in the main hopper (29) by additive manufacturing, - an inlet (211) of the supply module (2) designed to be connected to the manufacturing module (4) and to receive powder that is in the manufacturing module (4), - a glove box (25) designed to receive a container (28), the glove box (25) being suitable for being hermetically closed, - a supply circuit configured to transfer powder that is in the glove box (25) towards the main hopper (29), - a circulation system designed to move powder in a closed circulation loop, the circulation system comprising a suction system (21) distant from the main hopper (29), the suction system (21) being designed to remove gas present in the circulation loop, the circulation loop passing via the main hopper (29) and the suction system (21).
B22F 3/105 - Frittage seul en utilisant un courant électrique, un rayonnement laser ou un plasma
B29B 13/06 - Conditionnement ou traitement physique de la matière à façonner par séchage
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
B29C 64/165 - Procédés de fabrication additive utilisant une combinaison de matériaux solides et liquides, p.ex. une poudre avec liaison sélective par liant liquide, catalyseur, inhibiteur ou absorbeur d’énergie
The present invention relates to a method for determining additive manufacturing parameters for manufacturing an additive manufacturing support (1) for a target part having an offset. The method comprises the steps of: (a) additive manufacturing of a plurality of supports for each to support an offset (2) of a test part (3), each support (1) being associated with a set of manufacturing parameters and a set of geometric parameters of the offset (2); (b) manufacturing of the test part (3) and observation for each support (1) of a set of mechanical parameters of the support (1); (c) determination of the additive manufacturing parameters for manufacturing the support (1) of the target part according to the geometric parameters of the offset of the target part and the mechanical parameters of the support.
B22F 10/25 - Dépôt direct de particules métalliques, p.ex. dépôt direct de métal [DMD] ou mise en forme par laser [LENS]
B22F 10/28 - Fusion sur lit de poudre, p.ex. fusion sélective par laser [FSL] ou fusion par faisceau d’électrons [EBM]
B22F 10/38 - Commande ou régulation des opérations pour obtenir des caractéristiques spécifiques du produit, p.ex. le lissage de la surface, la densité, la porosité ou des structures creuses
G01N 3/08 - Recherche des propriétés mécaniques des matériaux solides par application d'une contrainte mécanique par application d'efforts permanents de traction ou de compression
G01N 3/40 - Recherche de la dureté ou de la dureté au rebondissement
G01N 9/02 - Recherche du poids spécifique ou de la densité des matériaux; Analyse des matériaux en déterminant le poids spécifique ou la densité en mesurant le poids d'un volume connu
G01N 9/36 - Analyse des matériaux en mesurant le poids spécifique ou la densité, p.ex. détermination de la quantité d'humidité
61.
MODULE FOR SUPPLYING ADDITIVE MANUFACTURING POWDER ALLOWING THE TRANSFER OF POWDER INTO A CONTAINER UNDER AN INERT ATMOSPHERE
The invention relates to a module (2) for supplying additive manufacturing powder comprising: - a main hopper (29) for storing additive manufacturing powder, the main hopper (29) being suitable for connection to a manufacturing module (4) configured to additively manufacture an object using the powder contained in the main hopper (29), - an inlet (211) of the supply module (2) suitable for being connected to the manufacturing module (4) and for receiving powder contained in the manufacturing module (4), - a glove box (25) suitable for receiving a container (28), the glove box (25) being suitable for being tightly closed, - a supply circuit configured to transfer powder contained in the glove box (25) to the main hopper (29), - an extraction circuit different from the supply circuit and configured to transfer to the container (28), when the container (28) is received in the glove box (25), additive manufacturing powder from the inlet (211) of the supply module (2), the glove box (25) comprising gloves (251) for closing the container (28) once filled with powder, while the glove box (25) is closed.
The invention relates to aa method for the manufacture of a component fully or partially made up of a three-dimensional lattice, this three-dimensional lattice being produced by additive manufacturing by successively depositing different layers of additive-manufacturing powder and selectively consolidating said layers of powder along at least a path comprising different manufacturing vectors, the three-dimensional lattice comprising at least two strata of strands that are parallel and spaced away from one another, the strands of one stratum extending in a different longitudinal direction from the longitudinal direction in which the strands of another stratum extend. The manufacturing method anticipates for each strand to be consolidated only via a plurality of manufacturing vectors extending in the longitudinal direction in which said strand extends.
B33Y 80/00 - Produits obtenus par fabrication additive
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
B22F 3/105 - Frittage seul en utilisant un courant électrique, un rayonnement laser ou un plasma
B29C 64/165 - Procédés de fabrication additive utilisant une combinaison de matériaux solides et liquides, p.ex. une poudre avec liaison sélective par liant liquide, catalyseur, inhibiteur ou absorbeur d’énergie
63.
PARTICLE SEPARATION DEVICE FOR ADDITIVE MANUFACTURE AND ADDITIVE MANUFACTURING APPARATUS
The invention relates to a particle separation device for selective additive manufacture and to a selective additive manufacturing apparatus. The particles are contained in a gaseous stream. The device comprises a dry-type pressurized-air separator (101), said dry-type pressurized-air separator comprising a separating turbine of which a rotary speed is adjustable. The dry-type pressurized-air separator selects the particles contained in the gaseous stream according to a particle size dependent on the rotary speed of the separating turbine. The device further comprises a device (102) for extracting particles contained in the gaseous stream. Fluidic communication between the dry-type pressurized-air separator and the extraction device is such that a gaseous stream exiting the dry-type pressurized-air separator circulates in the extraction device and that the gaseous stream exiting the extraction device circulates in the dry-type pressurized-air separator. The device further comprises a device (103) for circulating the gaseous stream between the dry-type pressurized-air separator and the extraction device.
B07B 7/083 - Séparation sélective des matériaux solides portés par des courants de gaz, ou dispersés dans ceux-ci utilisant la force centrifuge produite par la rotation d'ailettes, de disques, de tambours ou de brosses
B07B 7/10 - Séparation sélective des matériaux solides portés par des courants de gaz, ou dispersés dans ceux-ci utilisant la force centrifuge l'air étant recyclé à l'intérieur de l'appareil
B07B 9/02 - Combinaisons d'appareils semblables ou différents, pour séparer les solides, par utilisation de courants de gaz
B22F 3/105 - Frittage seul en utilisant un courant électrique, un rayonnement laser ou un plasma
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS) (France)
ECOLE NORMALE SUPERIEURE PARIS-SACLAY (France)
Inventeur(s)
Walrand, Gilles
Tournier, Christophe
Lavernhe, Sylvain
Ettaieb, Kamel
Abrégé
iiji+1ji+1jiji+1jiji+1i+1) passing through the several determined adjacent points, d) iterating steps a) to c) using the determined adjacent path as a new reference path, so as to determine, in each iteration, a new adjacent path, the set of thus determined adjacent paths defining the path intended to be followed by the laser beam, the path being stored and/or transmitted to a control unit of a selective additive manufacturing device.
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
B29C 64/386 - Acquisition ou traitement de données pour la fabrication additive
The invention relates to an additive manufacturing substrate (1) which, upon a plate of an additive manufacturing machine, comprises a stack produced by means of additive manufacture, comprising: - a divisible zone having a structure designed to hold, during manufacture, a part (100) which is to be made by means of additive manufacture, and, between the plate and the zone with the divisible structure, - an intermediate zone with a porous structure.
B29C 64/40 - Structures de support des objets en 3D pendant la fabrication, lesdites structures devant être sacrifiées après réalisation de la fabrication
An additive manufacturing machine (10) comprises at least one movable powder reception surface (28) capable of being displaced in proximity to a manufacturing zone (20), a powder spreading device (30), and a device (32) for distributing powder on the movable reception surface. The powder distribution device comprises a buffer tank (38) linked to a powder supply (40) and a distribution duct (42) linking the buffer tank to a powder distribution point (P1) situated above the movable reception surface, and the distribution duct (42) is mounted on a vibrating device making it possible to vibrate the distribution duct so as to generate a continuous flow of powder in the distribution duct and from the buffer tank to the powder distribution point.
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
The invention is a machine (10) for additive manufacturing by powder-bed deposition, said additive manufacturing machine comprising a working area (20) for receiving a stack of different powder layers, a device for depositing (30) a powder layer on the working area, and a consolidation source (40) for selectively consolidating each powder layer deposited on the working area, the device for depositing a powder layer comprising a powder container (32) which can be positioned above the working area, and a powder dispenser opening being provided in the lower portion of the container, the device for depositing a powder layer comprising a vibrating device (68) for vibrating the container, and the opening for dispensing powder from the container being provided with a sieve. The container is mounted on a load cell.
B33Y 30/00 - Appareils pour la fabrication additive; Leurs parties constitutives ou accessoires à cet effet
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
The present invention concerns a method for additive manufacturing of a part (1) comprising a step of manufacturing, by melting a layer of powder, a mixed support having at least one planar surface (21) intended to support the unmelted additive manufacturing powder and at least one needle (22) having a supporting end (23) for supporting a portion of the part (1). The supporting end (23) of the at least one needle (22) is situated at an altitude (A) higher than the altitude (B) of the at least one planar surface (21), such that the space (C) between the at least one planar surface (21) and the supporting end (23) of the at least one needle (22) can be filled by unmelted additive manufacturing powder so as to form a mat partially supporting the part (1).
B29C 64/40 - Structures de support des objets en 3D pendant la fabrication, lesdites structures devant être sacrifiées après réalisation de la fabrication
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
B22F 3/105 - Frittage seul en utilisant un courant électrique, un rayonnement laser ou un plasma
The invention relates to a machine for additive manufacturing by powder bed deposition, the machine comprising a work top, a work area, a device for depositing a layer of powder on the work area and a heat or energy source used to selectively consolidate a layer of powder deposited on the work area, the device for depositing a layer of powder comprising a movable element for receiving powder moving relative to the work top and near the work area, a device for dispensing a bead of powder onto the movable member, and a device for spreading the bead of powder from the movable member towards the work area. Since the movable element (28) is in the form of a translatable slide valve or the movable element (128) is rotatable about the work area, at least a part of the upper surface (S28, S128) of a movable element lies above the upper surface (S18) of the work top and/or at least a part of the upper surface (S28, S128) of a movable element lies below the upper surface (S18) of the work top.
B33Y 30/00 - Appareils pour la fabrication additive; Leurs parties constitutives ou accessoires à cet effet
B33Y 40/00 - Opérations ou équipements auxiliaires, p.ex. pour la manipulation de matériau
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
B22F 3/105 - Frittage seul en utilisant un courant électrique, un rayonnement laser ou un plasma
70.
METHOD FOR SEPARATING OBJECTS MANUFACTURED BY AN ADDITIVE MANUFACTURING PROCESS ON A MANUFACTURING PLATE
The invention relates to a method for separating objects (12) manufactured by an additive manufacturing process on a manufacturing plate (10), the objects (12) being rigidly connected to the plate (10) after manufacturing, the separation method comprising a cutting step making it possible to detach the objects (12) from the plate (10), the method providing for immobilising the objects (12) with respect to one another during and after the cutting step.
B29C 64/124 - Procédés de fabrication additive n’utilisant que des matériaux liquides ou visqueux, p.ex. dépôt d’un cordon continu de matériau visqueux utilisant des couches de liquide à solidification sélective
A process for the additive manufacture of a part within a machine, the machine including a working surface, a device for spreading the powder layer along at least one longitudinal horizontal direction, at least one injector of powder over the working surface, the injector being movable with respect to the working surface along at least one transverse horizontal direction, and a system for regulating the amount of powder dispensed by the injector, the process including the following stages: moving the injector along a trajectory comprising at least one component parallel to the transverse horizontal direction; and regulating the amount of powder dispensed by the injector at any point of the trajectory of the injector.
B33Y 30/00 - Appareils pour la fabrication additive; Leurs parties constitutives ou accessoires à cet effet
B33Y 50/02 - Acquisition ou traitement de données pour la fabrication additive pour la commande ou la régulation de procédés de fabrication additive
B23K 26/354 - Travail par rayon laser, p.ex. soudage, découpage ou perçage pour le traitement de surface par fusion
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
B23K 26/34 - Soudage au laser pour des finalités autres que l’assemblage
72.
Device for metering one or more powders, corresponding metering process and 3D printer that includes the device
A device for metering one or more powder(s) (A, B) to produce a flow (23) of powder(s) and of a carrier gas at a given volume flow rate, comprises: ⋅at least a first source (25) suitable for supplying a first flow (27) comprising a first powder (A) and a first carrier gas (G1) substantially at the given volume flow rate, ⋅a source (33) of a carrier gas suitable for supplying an adjustment carrier gas flow (35) substantially at the given volume flow rate, ⋅an outlet junction (49) for emitting said flow of powder(s) and of carrier gas, ⋅a first proportional valve (59), ⋅an adjustment proportional valve (75), and ⋅a control system (21) suitable for controlling at least the first proportional valve and the adjustment proportional valve so that the flow of powder(s) and of carrier gas has a volume flow rate substantially equal to the given volume flow rate.
B05B 7/14 - Appareillages de pulvérisation pour débiter des liquides ou d'autres matériaux fluides provenant de plusieurs sources, p.ex. un liquide et de l'air, une poudre et un gaz agencés pour projeter des matériaux en particules
B05B 12/14 - Aménagements de commande de la distribution; Aménagements de réglage de l’aire de pulvérisation pour fournir à un orifice de pulvérisation unique, un liquide ou un autre matériau fluide choisi parmi plusieurs
B22F 12/55 - Moyens multiples d’alimentation en matériau
B33Y 30/00 - Appareils pour la fabrication additive; Leurs parties constitutives ou accessoires à cet effet
B33Y 50/02 - Acquisition ou traitement de données pour la fabrication additive pour la commande ou la régulation de procédés de fabrication additive
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
B29C 64/268 - Agencements pour irradiation par faisceaux d’électrons [FE]
73.
ADDITIVE MANUFACTURING BY MODULATION OF THE SCANNING SPEED
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS) (France)
ECOLE NORMALE SUPERIEURE PARIS-SACLAY (France)
Inventeur(s)
Walrand, Gilles
Tournier, Christophe
Lavernhe, Sylvain
Ettaieb, Kamel
Abrégé
The present invention relates to a method for selective additive manufacturing of a three-dimensional object from a powder layer, the method comprising the steps of: - applying an additive manufacturing powder layer on a support or on a previously consolidated layer, - emitting a laser beam onto a first point of the additive manufacturing powder layer so as to consolidate a first area of the powder layer comprising the first point, the method further comprising - adjusting a scanning speed of the laser beam according to an estimated temperature variation of the powder layer at a second point distinct from the first point of the powder layer caused by the emission of the laser beam, so as to consolidate the first area of the powder layer, - emitting a laser beam onto the second point so as to consolidate a second area of the powder layer comprising the second point, the estimated temperature variation being a function of a predetermined time interval separating the emission on the first point and the emission on the second point, the distance separating the first point and the second point which is equal to the product of the scanning speed adjusted by the predetermined time interval.
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS) (France)
ECOLE NORMALE SUPERIEURE PARIS-SACLAY (France)
Inventeur(s)
Walrand, Gilles
Tournier, Christophe
Lavernhe, Sylvain
Ettaieb, Kamel
Abrégé
The invention relates to a method for the selective additive manufacturing of a three-dimensional object from a powder layer, the method comprising the steps of: - applying an additive manufacturing powder layer on a support or on a previously consolidated layer, - emitting a laser beam on a first point of the additive manufacturing powder layer so as to consolidate a first area of the powder layer comprising the first point, the method further comprising - adjusting a power of the laser beam as a function of an estimated temperature variation of the powder layer at a second point distinct of the first point of the powder layer, caused by the emission of the laser beam so as to consolidate the first area of the powder layer, the estimated temperature variation being a function of the distance between the first point and the second point and a predetermined time interval, - emitting a laser beam on the second point with the adjusted power so as to consolidate a second area of the powder layer comprising the second point, wherein the emission of the laser beam on the first point and the emission of the laser beam on the second point are temporally separated from the predetermined time interval.
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS) (France)
UNIVERSITE PARIS-SUD (France)
Inventeur(s)
Minea, Tiberiu
Walrand, Gilles
Effernelli, Albin
Abrégé
The invention concerns an assembly (7) for the surface treatment of powders, operating in situ, for additive manufacturing, the assembly (7) comprising a tank of etching agent (18) connected to a spray element (19) for spraying etching agent, the spray element (19) being arranged opposite a surface (26) of a layer of powder and being configured to spray the etching agent onto the grains of powder so as to carry out a method for the surface treatment of the powders in order to improve the energy absorption rate of the grains of powder, a corresponding surface treatment method, an additive manufacturing device and method implementing such a surface treatment of powders.
A kit for the calibration of a head system of a power radiation source of an additive manufacturing device comprises: a calibration plate having a plurality of reference marks, and a firing support made from at least one material sensitive to the radiation of the source, this support leaving the reference marks of the calibration plate visible when it is in place thereon, characterized in that the firing support comprises a plurality of windows distributed in such a way as to become superposed with the various reference marks of the calibration plate and leave them visible when the firing support is in place on the calibration plate. There is also a method for calibrating such a system.
B29C 64/20 - Fabrication additive, c. à d. fabrication d’objets en trois dimensions [3D] par dépôt additif, agglomération additive ou stratification additive, p.ex. par impression en 3D, stéréolithographie ou frittage laser sélectif - Détails ou accessoires à cet effet
The invention relates to a machine for additive manufacturing by means of powder bed deposition, said additive manufacturing machine comprising a working plane, a manufacturing sleeve (44) extending from the working plane and under the working plane, and a manufacturing plate (46) which effects a translational movement between an upper position and a lower position inside the manufacturing sleeve under the effect of an actuator (48), the plate being connected to the actuator by a support (50). The manufacturing sleeve (44) comprises a slot (66) in its height allowing the support (50) to pass through the manufacturing sleeve to connect the plate to the actuator when the manufacturing plate effects a translational movement from its upper position to its lower position in the manufacturing sleeve, wherein a closing element (68) closes a slot (66) of the sleeve as a function of the translational movement of the plate from its upper position towards its lower position in the sleeve, the closing element (68) being a strip (70) and the upper end (U70) of a closing strip being attached to the upper edge of the manufacturing sleeve or to the working plane.
B29C 64/232 - Moyens d’entraînement pour un mouvement le long de l'axe orthogonal au plan d’une couche
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
B33Y 30/00 - Appareils pour la fabrication additive; Leurs parties constitutives ou accessoires à cet effet
B22F 3/105 - Frittage seul en utilisant un courant électrique, un rayonnement laser ou un plasma
B29C 64/255 - Enceintes pour le matériau de construction, p.ex. récipients pour poudre
Method for cleaning a part (10) manufactured by an additive manufacturing method with at least one plug and a phase change of a cleaning product (16). The invention relates to a method for cleaning a part produced by an additive manufacturing method using an additive manufacturing powder, said part comprising at least one cavity (12) capable of containing an agglomerate of powder (14) at the end of the additive manufacturing method, said cavity comprising at least one opening, wherein the cleaning method is characterized in that it uses a cleaning product capable of taking at least two states, a liquid and a gaseous state, and of switching from the liquid state to the gaseous state, and in that it comprises at least the following steps: a) dipping the part into the cleaning product in the liquid state so that the cleaning product at least partially fills the cavity, b) closing each opening of the cavity by means of a plug (20), c) causing at least a portion of the cleaning product contained in the cavity to change to its gaseous state so as to increase the pressure of the cleaning product in the cavity.
The invention relates to a machine (40) for additive manufacturing by means of powder bed deposition, said additive manufacturing machine comprising a working plane (42), a manufacturing sleeve (44) extending from the working plane and under the working plane, and a manufacturing plate (46) which effects a translational movement between an upper position and a lower position inside the manufacturing sleeve under the effect of an actuator (48), the machine comprising a device for guiding the plate in translation in the sleeve, the plate being connected to a guide device by a support (50). The manufacturing sleeve (44) comprises a slot (66) in its height, allowing the support (50) to pass through the manufacturing sleeve in order to connect the plate to the guide device when the manufacturing plate effects a translational movement from its upper position to its lower position in the manufacturing sleeve, wherein a closing element (68) closes a slot (66) of the sleeve as a function of the translational movement of the plate from its upper position towards its lower position in the sleeve, the closing element (68) being a strip (70) and the upper end (U70) of the closing strip being attached to the upper edge of the manufacturing sleeve or to the working plane.
B29C 64/232 - Moyens d’entraînement pour un mouvement le long de l'axe orthogonal au plan d’une couche
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
B33Y 30/00 - Appareils pour la fabrication additive; Leurs parties constitutives ou accessoires à cet effet
B22F 3/105 - Frittage seul en utilisant un courant électrique, un rayonnement laser ou un plasma
B29C 64/255 - Enceintes pour le matériau de construction, p.ex. récipients pour poudre
Method for cleaning a part (10) manufactured by an additive manufacturing method by immersion, solidification and vibrations. The invention relates to a method for cleaning a part manufactured by an additive manufacturing method using an additive manufacturing powder, said part comprising at least one cavity (12) capable of containing an agglomerate of powder at the end of the additive manufacturing method. The cleaning method uses a cleaning product (16) that can take three states, a liquid, a solid and a gaseous state, and can reversibly change from one of these states to another of these states. The cleaning method comprises at least the following steps: a) immersing the part into the cleaning product in the liquid state, so that the cleaning product at least partially fills the cavity, b) causing at least a part of the cleaning product contained in the cavity to change to its solid state, c) subjecting the part to vibrations so as to bring at least a part of the cleaning product contained in the cavity from its solid state to its liquid state and subsequently to its gaseous state, or directly from its solid state to its gaseous state.
The present invention relates to a manufacturing chamber for an additive manufacturing machine, comprising in an enclosure: - a worktop, - a manufacturing platform for depositing the layers of additive manufacturing material and for supporting the part being manufactured, - a circuit for circulating a flow of inert gas over the manufacturing platform, characterized in that the enclosure and/or the worktop comprises an inlet opening for the flow of gas, in that the worktop comprises an upstream ramp connected to that region of the worktop in which the manufacturing platform is located by means of a surface having a rounded convex profile, and in that the surface having a rounded convex profile is configured to keep the flow of gas attached, by the Coanda effect, to the worktop.
B22F 3/105 - Frittage seul en utilisant un courant électrique, un rayonnement laser ou un plasma
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
B29C 64/371 - Conditionnement de l’environnement en utilisant un environnement autre que l’air, p.ex. un gaz inerte
The invention relates to a nut (1) for moving a powder transport slide in a selective additive manufacturing apparatus, comprising a threaded hole (2) extending along a first axis (A), characterized in that said nut has a slot (3a, 3b) which passes through the thickness of the nut from an outer surface of the nut (1) to the inner surface (5) of the threaded hole (2) and which extends in a plane passing through the first axis (A) on at least one thread pitch (6) of the threaded hole (2).
Disclosed is a switching system for a facility for 3D printing by spraying at least a first powder, including a body defining: at least one first upstream gas conduit configured to receive a gas; at least one first upstream powder conduit configured to receive the first powder; at least one first downstream discharge conduit for discharging the first powder; and a downstream work conduit configured in order to supply a nozzle designed for depositing at least the first powder. The system further includes a distributor that is movable with respect to the body, preferably in rotation about an axis, between a rest position, in which the first upstream powder conduit is fluidly connected, via the distributor, to the first downstream discharge conduit, and at least a first supply position, in which the first upstream powder conduit is fluidly connected, via the distributor, to the downstream work conduit.
B33Y 30/00 - Appareils pour la fabrication additive; Leurs parties constitutives ou accessoires à cet effet
B23K 26/144 - Travail par rayon laser, p.ex. soudage, découpage ou perçage en utilisant un écoulement de fluide, p.ex. un jet de gaz, associé au faisceau laser; Buses à cet effet l'écoulement de fluide contenant des particules, p.ex. de la poudre
B23K 26/14 - Travail par rayon laser, p.ex. soudage, découpage ou perçage en utilisant un écoulement de fluide, p.ex. un jet de gaz, associé au faisceau laser; Buses à cet effet
B22F 12/00 - Appareils ou dispositifs spécialement adaptés à la fabrication additive; Moyens auxiliaires pour la fabrication additive; Combinaisons d’appareils ou de dispositifs pour la fabrication additive avec d’autres appareils ou dispositifs de traitement ou de fabrication
The present invention relates to an additive manufacturing machine (10) comprising a suction box (80) configured to evacuate fumes arising from the additive manufacturing of a part, the machine (10) comprising a chamber (30) and a production platform (50), and the suction box (80) comprising a lower portion (81) arranged along one side wall of the chamber (30), comprising a suction pipe (82), and an upper portion (83) projecting opposite the lower portion (81) and opposite the side wall of the chamber (30), comprising an opening (84) which leads into the chamber (30) and which is connected to the suction pipe (82), the upper portion (83) being inclined such that the opening faces the production platform (50).
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
The present invention concerns an additive manufacturing machine (10) comprising a gas flow deflection member (110) for discharging fumes resulting from the additive manufacture of a workpiece, the machine (10) comprising an enclosure (30), a manufacturing plate (50), a gas inlet pipe (100) and a powder deposition carriage (60), characterised in that the deflection member (110) is configured to direct a gas flow from the gas inlet pipe (100) in a plane substantially tangential to the surface of a manufacturing zone (51) of the manufacturing plate (50), and in that the deflection member (110) is configured to be attached to the carriage (60).
The invention relates to an additive manufacturing machine (10) comprising a work surface (18) including a work area (20) for receiving a stack of different powder layers, a powder dispensing device (32) comprising a powder inlet (36) for delivering powder above the work surface. The powder dispensing device (32) comprises a powder reservoir (44) movably mounted above the work surface (18), which can move to below the powder inlet (36), the lower portion (45) of the reservoir (44) comprises a powder dispensing point (P1), and the powder dispensing device (32) comprises a control device (48) for controlling the flow of powder through the powder dispensing point during the movement of the reservoir. According to the invention, the reservoir (44) is mounted on a load cell (68).
The invention relates to a source of electron beams which is suitable for selective additive manufacturing, comprising a cathode, the cathode comprising an emission region suitable for emitting electrons, a main Wehnelt electrode, an anode and a set of power supply units suitable for applying an electric voltage to these three parts, the main Wehnelt electrode being positioned between the cathode and the anode, said source comprising an additional Wehnelt electrode and a power supply unit suitable for applying an electric voltage to said additional Wehnelt electrode, said additional Wehnelt electrode being disposed upstream of the main Wehnelt electrode in the direction of propagation of the electron beam in such a way that a first control surface of the additional Wehnelt electrode surrounds an upstream portion of the emission region in the direction of propagation of the electron beam, and a second control surface of the main Wehnelt electrode surrounds a downstream portion of the emission region in the direction of propagation of the electron beam.
H01J 37/063 - Disposition géométrique des électrodes pour la formation du faisceau
H01J 37/075 - Canons à électrons utilisant l'émission thermo-ionique de cathodes chauffées par bombardement de particules ou par irradiation, p.ex. par laser
H01J 37/06 - Sources d'électrons; Canons à électrons
88.
Calibrating the focus of a power radiation source of an additive manufacturing device
An assembly for calibrating a head system of a power radiation source of an additive manufacturing apparatus comprises: a calibration plate comprising a plurality of reference marks, and a firing medium made of at least one material that is sensitive to the radiation of the source, this medium leaving visible the reference marks of the calibration plate when it is in place on the latter, characterized in that the firing medium comprises a plurality of windows that are distributed so as to be superposed with the various reference marks of the calibration plate and to leave said marks visible when the firing medium is in place on the calibration plate. There is also a method for calibrating such a system.
The invention relates to a method for preparing the upper surface (40) of an additive manufacturing platen (24) by depositing a bed of powder, the method comprising at least one step consisting in increasing the roughness of at least one area of the upper surface of the platen by printing a pattern (M) in this area. According to the invention, the pattern is printed inside the additive manufacturing machine (10) by depositing a bed of powder in which the platen is then used for additive manufacturing using the powder bed deposition process.
B22F 3/105 - Frittage seul en utilisant un courant électrique, un rayonnement laser ou un plasma
B29C 59/16 - Façonnage de surface, p.ex. gaufrage; Appareils à cet effet par énergie ondulatoire ou rayonnement corpusculaire
B33Y 30/00 - Appareils pour la fabrication additive; Leurs parties constitutives ou accessoires à cet effet
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
The invention relates to an additive manufacturing machine (10), this additive manufacturing machine comprising a manufacturing chamber (12), the machine comprising at least one mobile powder receiving surface (28) and a manufacturing zone (20) situated in the manufacturing chamber, a powder spreading device (30) and at least one device (32) for dispensing powder onto the mobile receiving surface. The dispensing device comprises a buffer reservoir (40) connected to a supply of powder (42) and a powder dispensing point (P1) underneath which a mobile receiving surface (28) moves, and the dispensing device comprises a screw distributor (44) connecting the buffer reservoir (40) and the powder dispensing point (P1) and making it possible to generate a continuous stream of powder from the buffer reservoir to the powder dispensing point.
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
B33Y 30/00 - Appareils pour la fabrication additive; Leurs parties constitutives ou accessoires à cet effet
91.
APPARATUS AND METHOD FOR MANUFACTURING A THREE-DIMENSIONAL OBJECT
Apparatus for manufacturing a three-dimensional object by selective additive manufacturing, comprising: - a holder (140) suitable for holding at least one layer (150) of additive-manufacturing powder, - a laser source (110) suitable for emitting a laser beam (111), - a scanning device (130) suitable for directing the laser beam over the powder layer so as to scan at least one portion of the powder layer, - a device (120) for modulating the scanning path, said device being placed upstream of the scanning device, the modulating device comprising a modulating mirror (121) suitable for reflecting the laser beam output from the laser source and for directing it toward the scanning device, the angle of incidence of the laser beam output by the laser source on the modulating mirror being comprised between 20 and 45°.
B22F 3/105 - Frittage seul en utilisant un courant électrique, un rayonnement laser ou un plasma
B33Y 30/00 - Appareils pour la fabrication additive; Leurs parties constitutives ou accessoires à cet effet
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
B29C 64/268 - Agencements pour irradiation par faisceaux d’électrons [FE]
B23K 26/354 - Travail par rayon laser, p.ex. soudage, découpage ou perçage pour le traitement de surface par fusion
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS) (France)
UNIVERSITE PARIS-SUD (France)
Inventeur(s)
Walrand, Gilles
Minea, Tiberiu
Abrégé
The invention relates to a device for localized heating of a powder bed in an additive manufacturing apparatus, comprising - a device (20) for localized generation of plasma, which is suitable for being placed and moved above a powder bed so as to generate a localized plasma thereon, - a source (22) for supplying said plasma-generating device (20) with electrical power, - a control unit (9) for controlling the supply and movement of the plasma-generating device (20), the plasma-generating device (20) comprising a plurality of control modules (S1, S2,…) that are able to control the localized spray of a plasma onto the powder bed, the supply and turn-on of the control modules (S1, S2, …) being individually controlled by the control unit (9) during the movement of the plasma-generating device (20).
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
B29C 64/295 - Fabrication additive, c. à d. fabrication d’objets en trois dimensions [3D] par dépôt additif, agglomération additive ou stratification additive, p.ex. par impression en 3D, stéréolithographie ou frittage laser sélectif - Détails ou accessoires à cet effet Éléments de chauffage
B22F 3/105 - Frittage seul en utilisant un courant électrique, un rayonnement laser ou un plasma
B29C 35/02 - Chauffage ou durcissement, p.ex. réticulation ou vulcanisation
H05H 1/34 - Torches à plasma utilisant un arc - Détails, p.ex. électrodes, buses
93.
HEATING DEVICE FOR ADDITIVE MANUFACTURING APPARATUS
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS) (France)
UNIVERSITE PARIS-SUD (France)
Inventeur(s)
Walrand, Gilles
Minea, Tiberiu
Bauville, Gérard
Pasquiers, Stéphane
Abrégé
The invention relates to a device for heating a bed of powder in an additive manufacturing apparatus, characterized in that it comprises: - a plasma generating device (28), said device being capable of being placed and moved above the powder bed, at a distance from the powder bed that enables the generation of the plasma thereon, a unit (22) for electrically powering said heating device, - a control unit (9) for controlling the power supply and the movement of the heating device.
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
B29C 64/295 - Fabrication additive, c. à d. fabrication d’objets en trois dimensions [3D] par dépôt additif, agglomération additive ou stratification additive, p.ex. par impression en 3D, stéréolithographie ou frittage laser sélectif - Détails ou accessoires à cet effet Éléments de chauffage
B22F 3/105 - Frittage seul en utilisant un courant électrique, un rayonnement laser ou un plasma
B29C 35/02 - Chauffage ou durcissement, p.ex. réticulation ou vulcanisation
H01J 37/32 - Tubes à décharge en atmosphère gazeuse
H05H 1/34 - Torches à plasma utilisant un arc - Détails, p.ex. électrodes, buses
94.
MAGNETIC CONFINEMENT HEATING DEVICE FOR SELECTIVE ADDITIVE MANUFACTURING APPARATUS
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS) (France)
UNIVERSITE PARIS-SUD (France)
Inventeur(s)
Walrand, Gilles
Minea, Tiberiu
Ballage, Charles
Lundin, Daniel
Petty, Thomas
Abrégé
The invention relates to a device for heating a powder bed in an additive manufacturing apparatus, characterized in that it includes: - a plasma generation device (20), said device being designed to be arranged and moved above the powder bed, at a distance from the powder bed that makes it possible to generate plasma thereon, - a unit for supplying electric power (22) to said plasma generation device, - a control unit (9) for controlling the supply of power to and movement of the plasma generation device, and in that the plasma generation device (20) includes an assembly for magnetically confining the plasma.
B33Y 30/00 - Appareils pour la fabrication additive; Leurs parties constitutives ou accessoires à cet effet
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
B29C 64/282 - Agencements pour irradiation utilisant des moyens de rayonnement multiples, p.ex. des micro-miroirs ou des diodes électroluminescentes multiples [LED] du même type, p.ex. utilisant des niveaux d’énergie différents
B29C 64/295 - Fabrication additive, c. à d. fabrication d’objets en trois dimensions [3D] par dépôt additif, agglomération additive ou stratification additive, p.ex. par impression en 3D, stéréolithographie ou frittage laser sélectif - Détails ou accessoires à cet effet Éléments de chauffage
H05H 1/46 - Production du plasma utilisant des champs électromagnétiques appliqués, p.ex. de l'énergie à haute fréquence ou sous forme de micro-ondes
H05H 1/50 - Production du plasma utilisant un arc et utilisant des champs magnétiques appliqués, p.ex. pour focaliser ou pour faire tourner l'arc
B33Y 40/00 - Opérations ou équipements auxiliaires, p.ex. pour la manipulation de matériau
95.
ADDITIVE MANUFACTURING MACHINE COMPRISING A DEVICE FOR THE DISTRIBUTION OF POWDER ONTO A MOBILE SURFACE USING VIBRATION
The invention relates to an additive manufacturing machine (10), this machine comprising at least one mobile powder-receiving surface (28) able to move in the vicinity of a manufacturing zone (20), a powder spreading device (30) and a distribution device (32) for distributing powder over the mobile receiving surface. The powder distribution device comprises a buffer reservoir (38) connected to a supply of powder (40), and a distribution duct (42) connecting the buffer reservoir to a powder distribution point (P1) situated above the mobile receiving surface, and the distribution duct (42) is mounted on a vibrating device allowing the distribution duct to be made to vibrate so as to generate a continuous stream of powder in the distribution duct and from the buffer reservoir toward the powder distribution point.
An additive manufacturing machine (10) comprises: a manufacturing chamber (12), the manufacturing chamber being formed by at least one working plane (20), a front wall (22), a rear wall (24), a left-hand lateral wall (26), a right-hand lateral wall, and an upper wall (30), at least one of these walls supporting a source of energy or heat (14); an inner skin (32) that is positioned inside the manufacturing chamber (12) in front of each wall of this chamber supporting the source of energy or heat (14) and at a non-zero distance from these walls so as to create a circulation volume (V) for a flow of gas (F); and a device (52) for generating the flow of gas (F) that is connected to the circulation volume (V).
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
B22F 12/00 - Appareils ou dispositifs spécialement adaptés à la fabrication additive; Moyens auxiliaires pour la fabrication additive; Combinaisons d’appareils ou de dispositifs pour la fabrication additive avec d’autres appareils ou dispositifs de traitement ou de fabrication
B33Y 30/00 - Appareils pour la fabrication additive; Leurs parties constitutives ou accessoires à cet effet
B33Y 40/00 - Opérations ou équipements auxiliaires, p.ex. pour la manipulation de matériau
B29C 64/371 - Conditionnement de l’environnement en utilisant un environnement autre que l’air, p.ex. un gaz inerte
B29C 64/295 - Fabrication additive, c. à d. fabrication d’objets en trois dimensions [3D] par dépôt additif, agglomération additive ou stratification additive, p.ex. par impression en 3D, stéréolithographie ou frittage laser sélectif - Détails ou accessoires à cet effet Éléments de chauffage
The invention relates to an additive manufacturing device (1) comprising a frame (3), a manufacturing chamber (31), and a plate (35) for depositing an additive manufacturing powder, said plate being translationally movable in relation to the manufacturing chamber (31). The device (1) comprises at least one actuator (6) capable of translationally moving the manufacturing chamber (31) in relation to the chassis (3) in order to move the manufacturing chamber (31) away from the plate (35) as a part (X) is being additively manufactured.
B22F 3/105 - Frittage seul en utilisant un courant électrique, un rayonnement laser ou un plasma
B33Y 30/00 - Appareils pour la fabrication additive; Leurs parties constitutives ou accessoires à cet effet
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p.ex. par frittage ou fusion laser sélectif
B29C 64/20 - Fabrication additive, c. à d. fabrication d’objets en trois dimensions [3D] par dépôt additif, agglomération additive ou stratification additive, p.ex. par impression en 3D, stéréolithographie ou frittage laser sélectif - Détails ou accessoires à cet effet
The invention relates to an additive manufacturing device (1) comprising a manufacturing chamber (31) and a plate (35) that is translationally movable in relation to the manufacturing chamber (31). The device (1) further comprises: - at least one translational movement compensation element (5) that is translationally movable in relation to both the manufacturing chamber (31) and the plate (35); - means for translationally moving the plate (35) which comprise at least one first actuator (61) for translationally moving the at least one translational movement compensation element (5) in relation to the manufacturing chamber (31), and at least one second actuator (62) for translationally moving the plate (35) in relation to the at least one translational movement compensation element (5).
The invention relates to an apparatus for manufacturing a three-dimensional object by selective additive manufacturing, comprising, in a chamber, a support for depositing successive layers of additive manufacturing powder, a distribution arrangement suitable for applying a layer of powder on the support or on a previously consolidated layer, at least one electron beam source suitable for selectively consolidating a powder layer applied by the distribution arrangement and electronics for controlling and feeding the source, characterised in that the source is an indirectly heated cathode electron beam source, the source comprising a heating filament (22) located behind the cathode (21) of the source with respect to the direction in which the electrons are ejected and accelerated by the cathode (21).
B22F 3/105 - Frittage seul en utilisant un courant électrique, un rayonnement laser ou un plasma
B23K 15/00 - Soudage ou découpage par faisceau d'électrons
H01J 37/317 - Tubes à faisceau électronique ou ionique destinés aux traitements localisés d'objets pour modifier les propriétés des objets ou pour leur appliquer des revêtements en couche mince, p.ex. implantation d'ions
B28B 1/00 - Fabrication d'objets façonnés à partir du matériau
H01J 1/14 - Cathodes thermo-ioniques solides caractérisées par le matériau constitutif
The invention concerns an inertable container (10) for transporting an additive manufacturing powder, the container (10) comprising an inertable volume (12) and a main opening (14) providing access to the inside of this inertable volume, the inertable volume (12) comprising a top portion (16) and a bottom portion (18), the main opening (14) being situated in the bottom portion (18) of the inertable volume, and the cross section (S12) of the inertable volume (12) increasing gradually over at least part of the height (H10) of the container (10) and from the bottom portion (18) towards the top portion (16) of the inertable volume, the container being characterised in that the main opening is equipped with a passive half-valve (20) allowing this main opening (14) to be closed in such a way as to be sealed in an airtight and moisture-proof manner, and in that the container comprises at least two inerting tappings, at least one first upper tapping (22) providing access to the top portion (16) of the inertable volume and at least one second lower tapping (24) providing access to the bottom portion (18) of the inertable volume.
