A transparent component is provided. The transparent component includes a functionalized surface. The functionalized surface has dimples. Thereby, the functionalized surface of the transparent component is functionalized. The functionalized surface is functionalized by an anti-glare functionalization. A fill area of the dimples on the functionalized surface is between 20% and 95%.
A method for planning local solidification of a layer of powder material with a high-energy beam while manufacturing a three-dimensional object layer by layer includes determining a inskin area and a downskin area, defining an inskin pattern for the inskin area and downskin pattern for the the downskin area independently, by defining geometric progression of inskin vectors in the inskin area and defining geometric progression of downskin vectors in the downskin area, and defining a processing sequence of the inskin vectors and the downskin vectors, by defining inskin vector blocks and downskin vector blocks. Each inskin vector block includes inskin vectors to be processed successively. Each downskin vector block includes downskin vectors to be processed successively. The method further includes defining a vector-block sequence for processing the inskin vector blocks and the downskin vector blocks alternately.
B29C 64/393 - Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
B29C 64/153 - Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
A laser system for laser metal deposition includes a laser source for generating a laser beam having a wavelength in a range between 0.4 μm and 1.5 μm, and a jet nozzle for directing the laser beam at a workpiece surface and for directing a powder jet including a pulverulent material at the laser beam and at the workpiece surface. The laser beam exiting from the jet nozzle has a reduced intensity in a core region in comparison with a border region. The pulverulent material includes hard-material particles.
C23C 24/10 - Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
B23K 26/14 - Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beamNozzles therefor
B23K 26/144 - Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beamNozzles therefor the fluid stream containing particles, e.g. powder
A method for operating a system for layered manufacturing of an object on a base element includes A) arranging the base element on a piston plate, B) carrying out a preliminary measurement in the system, wherein a measurement pattern on an upper side of the base element is measured, C) based on data from the preliminary measurement, preparing and carrying out the layered manufacturing of the object, and A′), after the step A) and before the step B), in a treatment region of the base element, roughen a surface of the base element with a working laser in the system. In the step B), the measurement pattern includes a light pattern projected into the roughened treatment region, and/or an edge structure with a plurality of edges. At least a part of the plurality of edges of the edge structure is in the roughened treatment region.
B29C 64/393 - Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
B29C 64/153 - Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
B29C 64/371 - Conditioning of environment using an environment other than air, e.g. inert gas
B33Y 30/00 - Apparatus for additive manufacturingDetails thereof or accessories therefor
B33Y 50/00 - Data acquisition or data processing for additive manufacturing
A method for severing a workpiece having a transparent material includes providing multiple focus elements using an input laser beam, applying the multiple focus elements to the material, thereby forming material modifications in the material along a predetermined processing line, and severing the material along the processing line by an etching process using a wet chemical solution. A temperature of the wet chemical solution during the etching process is at least 100° C. and/or at most 150° C.
A method for producing an object in layers by locally solidifying a pulverulent material includes scanning N high-energy beams simultaneously with N scanners, providing exposure data of a machining pattern in a reference coordinate system, converting the exposure data in the reference coordinate system into exposure data in a scanner coordinate system by using a programmed coordinate transformation, sending the exposure data in the scanner coordinate system to the associated scanner so that the associated scanner exposes the machining pattern in the respective layer, repeatedly taking measurements to determine current actual coordinate transformations of at least N−1 scanners, and updating the programmed coordinate transformations for the at least N−1 scanners, taking into account the current actual coordinate transformations. Multiple updates of the programmed coordinate transformations of the at least N−1 scanners are performed between two successive determinations of the current actual coordinate transformations.
B29C 64/393 - Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
B29C 64/153 - Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
B29C 64/268 - Arrangements for irradiation using laser beamsArrangements for irradiation using electron beams [EB]
B33Y 30/00 - Apparatus for additive manufacturingDetails thereof or accessories therefor
B33Y 50/02 - Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
7.
SUCTION DEVICE FOR SUCKING UP PROCESS GAS WITH A STATIONARY GAS-CONVEYING CHANNEL AND DEVICE FOR PRODUCING THREE-DIMENSIONAL OBJECTS COMPRISING SUCH A SUCTION DEVICE
A suction device for sucking up process gas from a process chamber of a device for producing three-dimensional objects by selective solidification of a build-up material applied in layers by using a beam acting on the build-up material is provided. The suction device includes a translationally movable suction module, a gas-conveying channel arranged in a stationary manner and having an elongated slot, and a connector connected to the suction module and movable in the elongated slot of the gas-conveying channel. The connector fluidically connects the suction module to the gas-conveying channel.
B29C 64/153 - Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
B33Y 30/00 - Apparatus for additive manufacturingDetails thereof or accessories therefor
B33Y 40/00 - Auxiliary operations or equipment, e.g. for material handling
A device mounts a large-scale optical unit, and includes a carrier plate; a rigid support surface, which is arranged on the carrier plate and is designed for mounting a bottom surface of the large-scale optical unit in a predetermined position and a predetermined orientation; and an elastic support surface, which is arranged on the carrier plate and is designed for mounting the bottom surface of the large-scale optical unit elastically. The rigid support surface is designed for mounting the large-scale optical unit at a Bessel point of the large-scale optical unit.
A manufacturing process for additively manufacturing a shaped body includes repeatedly adding a further layer to a previous layer arrangement by I) applying a new layer of a powder to the previous layer arrangement, and II) melting the powder of the new layer in a melting region delimited by a contour, with a first high-energy beam having a first melting depth. At least for some of the further layers, the adding of the further layer further includes III) determining a machining part of the contour, and after step II), moving a second high-energy beam along a line of travel extending parallel to the machining part of the contour, thereby the further layer and at least part of an uppermost layer of the previous layer arrangement are melted along the line of travel. The second high-energy beam has a second melting depth that is greater than the first melting depth.
A laser cladding method includes directing a filler material in a pulverulent form along a respective working trajectory onto each respective surface of two mutually opposite surfaces of a component, and heating the filler material and the component by directing a respective laser beam along the respective working trajectory so that the filler material binds to the component as the filler material meets the respective surface, thereby producing coating layers on the two mutually opposite surfaces at least partly at a same time.
A laser cladding method for producing a coating layer on a surface of a component includes applying a filler material along a helical or spiral-shaped processing trajectory on the surface of the component, and heating the filler material and the component along the processing trajectory by using a laser beam, so that when the filler material strikes the surface, least one coating track is created on the surface having a specified track width. At least two turns of the at least one coating track at least partially overlap with one another along the track width.
A method for joining two components of a battery includes welding the two components to one another by scanner welding using a processing beam provided by a welding apparatus, and guiding a measurement beam of an OCT sensor system optically coaxially with the processing beam while the welding apparatus is performing the scanner welding. The measurement beam and the processing beam are guided at a substantially matching angle of incidence relative to at least one processing surface of the two components.
A method for determining at least one geometrical outcome variable and/or at least one quality feature of a weld seam on at least one workpiece includes scanning the weld seam using a measurement beam during laser beam welding of the weld seam in order to acquire data points. The measurement beam is moved along at least one measurement path on the weld seam. The acquired data points indicate a height and/or a depth of the weld seam in relation to a workpiece surface of the at least one workpiece. The method further includes determining the at least one geometrical outcome variable and/or the at least one quality feature by evaluating the acquired data points.
B23K 31/12 - Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups relating to investigating the properties, e.g. the weldability, of materials
A method of welding two metal sheets includes providing a first sheet having a first weld surface and a second sheet having a second weld surface. The first sheet has a zinc coating on the first weld surface. The method further includes arranging the first and the second weld surfaces such that the first and the second weld surfaces face each other with a gap therebetween, and irradiating the first and the second weld surfaces with a laser beam. The laser beam is moved with a wobbling motion in a feed direction along an imaginary feed line and perpendicular to the imaginary feed line. A path of the laser beam along the imaginary feed line is of a periodic shape. A width of the path perpendicular to the imaginary feed line is greater than a length of a period of the path along the imaginary feed line.
A method of welding two metal sheets includes providing a first sheet having a first weld surface and a second sheet having a second weld surface. The first sheet has a coating includes an alloy of aluminum and silicon on the first weld surface. The method further includes irradiating the first weld surface and the second weld surface with a laser beam. The laser beam has an inner core and an outer ring with different intensity profiles. The laser beam is moved with a wobbling motion in a feed direction along an imaginary feed line and perpendicular to the imaginary feed line. A path of the laser beam along the imaginary feed line is of a periodic shape. A width of the path perpendicular to the imaginary feed line is greater than a length of a period of the path along the imaginary feed line.
A method for laser beam welding of a plurality of component parts at a plurality of processing locations of a component by using a laser welding apparatus includes (a) measuring a respective processing location of the plurality of processing locations by using a measurement beam and/or by using a sensor system, and (b) laser beam welding of a previously measured processing location of the plurality of processing locations by using a processing beam. The steps (a) and (b) are carried out in parallel.
A device for processing a workpiece using a laser beam of a laser includes a retarder plate and a focusing device. The retarder plate is configured to apply a first location-dependent phase retardation to a first part of the laser beam having a first input polarization, and to apply a second location-dependent phase retardation to a second part of the laser beam having a second input polarization. The focusing device is configured to focus the laser beam in at least one focus zone. A beam form of the laser beam in the focus zone is determined by the first location-dependent phase retardation and the second location-dependent phase retardation. The at least one focus zone at least partially overlaps with the workpiece. The workpiece is subjected to laser radiation in the at least one focus zone and is thus processed.
A laser build-up welding method includes directing a powdered material and a laser beam onto a workpiece surface of a workpiece at an angle to one another. The powdered material is at least partially heated in an interaction zone with the laser beam above the workpiece surface and is welded onto the workpiece surface along a predefined contour, the laser beam has a wavelength that ranges between 0.4 μm and 1.1 μm. The laser beam within the interaction zone has an intensity in its border region that is greater than an intensity in the core region of the laser beam, so that the powdered material is subjected to the greater intensity of the border region when entering the interaction zone.
A production process includes heating a carrier to above 400° C., and additively manufacturing a first support structure on the heated carrier by laser melting a metal powder. The first support structure has multiple first support struts. A length of the first support struts is greater than a maximum width of the first support struts. The production process further includes additively manufacturing a first component on the first support structure by laser melting the metal powder, and detaching the first component from the first support structure.
The invention relates to a device and a method for processing a workpiece (4), in particular for impressing a surface functionalization, using laser pulses (100) of a laser beam (10), comprising a laser (1), a hologram (2), and an optical imaging system (3), wherein the laser (1), in particular a short pulse laser or an ultrashort pulse laser, is designed to provide the laser beam (10) with the laser pulses (100) to the hologram (2), and the hologram (2) is designed to receive the laser beam (10), convert the laser beam (10) into a plurality of sub-laser beams (12), and bring same into interference and forward same to the optical imaging system (3). The optical imaging system (3) is designed to receive the sub-laser beams (12) of hologram (2) and focus the sub-laser beams onto a focal plane on or in the workpiece (4) as a processing beam (14), and the workpiece (40) is supplied with the processing beam (14) and is thus processed. The hologram (2) is additionally designed to impress a regular intensity distribution (I) onto the processing beam (14) on the focal plane.
The invention relates to a device for processing a workpiece (4), in particular for impressing an antiglare functionalization, using laser pulses (100) of a laser (1), comprising a laser (1), in particular a short pulse laser or an ultrashort pulse laser, which is designed to provide a laser beam (10) with laser pulses (100), at least one diffusing disc (2) which is designed to diffuse the laser beam (10), and at least one optical focusing system (3) which is designed to focus the laser beam (10) onto a focal zone (120) on the focal plane (12) on the workpiece (4), wherein the workpiece (4) is supplied with the laser beam (10) and is thus processed, and the diffusing disc (2) is designed to impress a locally randomized intensity distribution onto the laser beam (10) on the focal plane (12).
G02B 27/09 - Beam shaping, e.g. changing the cross-sectioned area, not otherwise provided for
G03H 1/00 - Holographic processes or apparatus using light, infrared, or ultraviolet waves for obtaining holograms or for obtaining an image from themDetails peculiar thereto
22.
METHOD FOR THE LASER WELDING OF A WORKPIECE WITH A RAPID CHANGE BETWEEN WELDING ZONES HAVING DIFFERENT MATERIALS TO BE WELDED
A method for laser welding of a workpiece includes directing a laser beam onto the workpiece by using scanner optics, and in an arbitrary order with the laser beam, welding a first component to a base part of the workpiece at least in a first welding zone, and welding a second component to the base part in a second welding zone. A laser energy of the laser beam is capable of being split variably at least between a core fraction corresponding to a core beam of the laser beam, and a ring fraction corresponding to a ring beam of the laser beam that encloses the core beam. The splitting of the laser energy between the core fraction and the ring fraction is selected differently for welding in the first welding zone and for welding in the second welding zone.
The invention relates to an additive manufacturing device (14) for series manufacturing of at least two manufacturing orders (12) using a manufacturing cylinder (16) of the additive manufacturing device (14), having at least one powder compartment (28) that is moveably arranged within a process chamber (15) of the additive manufacturing device (14), wherein the additive manufacturing device (14) is designed for moving the powder compartment (28) within the process chamber (15), wherein the powder compartment (28) is designed for at least partially receiving a process powder column (27) formed from a process powder (22) in the manufacturing cylinder (16), and wherein the additive manufacturing device (14) is designed for moving the powder compartment (28) and the process powder column (27) accommodated in the powder compartment (28). The invention also relates to a preparation method (10) for series manufacturing of manufacturing orders (12).
B22F 10/28 - Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
B33Y 30/00 - Apparatus for additive manufacturingDetails thereof or accessories therefor
B33Y 40/00 - Auxiliary operations or equipment, e.g. for material handling
B22F 12/88 - Handling of additively manufactured products, e.g. by robots
B29C 64/153 - Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
B29C 64/176 - Processes of additive manufacturing specially adapted for manufacturing multiple 3D objects sequentially
B29C 64/236 - Driving means for motion in a direction within the plane of a layer
B29C 64/255 - Enclosures for the building material, e.g. powder containers
B29C 64/379 - Handling of additively manufactured objects, e.g. using robots
A method for laser processing a workpiece is provided. The workpiece includes a transparent material. The method includes splitting an input laser beam into a plurality of partial beams using a beam splitter, focusing the plurality of partial beams coupled out of the beam splitter to form multiple focus elements, and subjecting the material of the workpiece to the multiple focus elements for laser processing. A distance between adjacent focus elements is at least 3 μm and/or at most 70 μm.
B23K 26/06 - Shaping the laser beam, e.g. by masks or multi-focusing
B23K 26/067 - Dividing the beam into multiple beams, e.g. multi-focusing
B23K 26/352 - Working by laser beam, e.g. welding, cutting or boring for surface treatment
25.
METHOD AND PLANNING DEVICE FOR PLANNING A LOCALLY SELECTIVE IRRADIATION OF A WORKING REGION WITH AT LEAST ONE ENERGY BEAM, AND METHOD AND MANUFACTURING DEVICE FOR ADDITIVELY MANUFACTURING COMPONENTS FROM A POWDER MATERIAL
The invention relates to a method for planning a locally selective irradiation of a working region (15) with at least one energy beam (11) in order to produce, by means of the at least one energy beam (11), at least one component (3) layer by layer from a plurality of powder material layers of a powder material (5) arranged one after the other at successive times in a sequence of layers in the working region (15), wherein ˗ an irradiation sequence over time of an irradiation of a plurality of irradiation regions (21) with the at least one energy beam (11) is determined for at least one powder material layer on the basis of at least two sequence criteria, wherein ˗ the fact that irradiation regions (21) which have a smaller transverse axis coordinate value along a transverse axis oriented transverse to a predefined protective gas flow direction over the working region (15) are irradiated before irradiation regions (21) which have a larger transverse axis coordinate value along the transverse axis is used as a first sequence criteria, wherein ˗ the fact that irradiation regions (21) which have a larger flow axis coordinate value along a flow axis pointing in the protective gas flow direction are irradiated before irradiation regions (21) which have a smaller flow axis coordinate value along the flow axis is used as a second sequence criteria, wherein ˗ an irradiation plan is obtained for the locally selective irradiation of the working region (15) with the at least one energy beam (11) in the at least one powder material layer.
B22F 10/28 - Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
B22F 10/366 - Scanning parameters, e.g. hatch distance or scanning strategy
B29C 64/153 - Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
B29C 64/282 - Arrangements for irradiation using multiple radiation means, e.g. micromirrors or multiple light-emitting diodes [LED] of the same type, e.g. using different energy levels
A method for identifying splatters or weld seam defects during laser processing of a workpiece includes processing the workpiece using a processing laser beam of a laser processing machine, compiling at least one recording of radiation emerging during the processing of the workpiece using an optical sensor that has a plurality of pixels for recording the radiation, and inputting the at least one recording into an evaluation unit. The evaluation unit has a machine learning algorithm configured as a convolutional neural network in a U-Net architecture. The machine learning algorithm has been trained with verified recordings of splatters or weld seam defects. The method further includes identifying one or more splatters or weld seam defects in the processing of the workpiece by running the machine learning algorithm using the at least one recording as input, and outputting an output indicating the identified one or more splatters or weld seam defects.
B23K 31/00 - Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups
B23K 31/12 - Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups relating to investigating the properties, e.g. the weldability, of materials
27.
SUCTION UNIT FOR AN EXHAUST DEVICE AND ADDITIVE MANUFACTURING DEVICE COMPRISING AN EXHAUST DEVICE
The invention relates to a suction unit (26; 26a, 26b) for an exhaust device (12) for extracting a process gas out of a process chamber (14) of an additive manufacturing device (10), comprising a first suction head (36a) and a second suction head (36b) for suctioning the process gas within the process chamber (14), an exhaust channel (34) for discharging the process gases suctioned by the suction heads (36; 36a-e), wherein the first suction head (36a) is arranged or formed on the exhaust channel (34) in front of the second suction head (36b) in an exhaust direction (38), wherein the exhaust channel (34) has a first channel segment (48a) with a first feed cross-section (50a) and a second channel segment (48b) with a second feed cross-section, wherein the first feed cross-section (50a) has a flow cross-sectional area that is greater than a flow cross-sectional area of the second feed cross-section (50b), and wherein the first suction head (36a) feeds into the first channel segment (48a) and the second suction head (36b) and the first channel segment (48a) feed into the second channel segment (48b).
The invention relates to a dosing device (12) for being arranged on the outside of a process chamber (14) of an additive manufacturing device (10) and for conveying process powder into the process chamber (14), the dosing device comprising: - at least one powder container (44) having at least one powder cavity (46) which is designed to receive the process powder; - a container guide (48) for moving the powder container (44) in a straight line along a conveying axis (50) of the dosing device (12); wherein the powder container (44) is movably arranged on the container guide (48); and wherein the powder container (44) is designed to be deflected beyond the container guide (48) along the conveying axis (50). The invention further relates to an additive manufacturing device (10) and to a dosing method (88).
B29C 64/153 - Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
A device for processing a workpiece includes a laser configured to emit a laser beam, a polarization switch configured to switch the polarization of the laser beam between two polarization states and/or to rotate the polarization of the laser beam, a polarization beam splitter configured to split the laser beam into two partial laser beams with mutually orthogonal polarization states. A first partial laser beam has a first offset and a second partial laser beam has a second offset after passing through the polarization beam splitter. The device further includes processing optics configured to introduce the two partial laser beams into the workpiece in two focal zones, in order to process the workpiece. The polarization switch is arranged before the polarization beam splitter in a beam propagation direction. The switching and/or the rotation of the polarization by the polarization switch alternately maximize intensities of the two partial laser beams.
A method for welding at least two aluminum-containing components includes subdividing an output laser beam into multiple partial beams directed onto the at least two components, so that multiple laser spots are generated on a surface of the at least two components, and traversing a welding contour with the multiple laser spots on the surface of the components. Centers of at least three laser spots of the multiple laser spots are arranged in a ring formation. The output laser beam is generated by a multifiber, so that each laser spot of the multiple laser spots on the surface of the components has a core portion and a ring portion. The welding contour is traversed at least partially a second time after the welding contour has been traversed a first time.
B23K 31/12 - Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups relating to investigating the properties, e.g. the weldability, of materials
A method for powder injection monitoring during laser beam buildup welding includes irradiating a workpiece using a work laser beam, conveying powder through at least one powder nozzle to generate a powder jet, illuminating the powder jet transversely to a jet direction of the powder jet, and taking at least one picture of the powder jet by using a camera. A viewing direction of the camera extends coaxially to the jet direction of the powder jet. The method further includes performing an actual assessment of the at least one picture by an algorithm, and outputting a message upon determining that a predefined deviation of the actual assessment from a target assessment is exceeded.
B23K 26/144 - Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beamNozzles therefor the fluid stream containing particles, e.g. powder
B22F 12/41 - Radiation means characterised by the type, e.g. laser or electron beam
B22F 12/90 - Means for process control, e.g. cameras or sensors
A method for processing a workpiece with a laser beam includes guiding the laser beam by a scanner optical unit of an optical system. The laser beam has a linear cross section with an aspect ratio of a long side to a short side of more than 2 when impinging on the workpiece.
Methods and systems for generating a laser beam with different beam profile characteristics are provided. In one aspect, a method includes coupling an input laser beam into one fiber end of a multi-clad fiber, in particular a double-clad fiber and emitting an output laser beam from the other fiber end of the multi-clad fiber. To generate different beam profile characteristics of the output laser beam, the input laser beam is electively coupled either at least into the inner fiber core of the multi-clad fiber or at least into at least one outer ring core of the multi-clad fiber, or a first sub-beam of the input laser beam is coupled into at least into the inner fiber core of the multi-clad fiber and a second, different sub-beam of the input laser beam is coupled at least into the at least one outer ring core of the multi-clad fiber.
The invention relates to a construction chamber and a machine for producing three-dimensional components. Construction chamber for a machine (11) for producing a three-dimensional component (12) by selectively solidifying a construction material applied in layers by means of a jet (16) acting on the construction material, having a construction cylinder (31) in which a substrate plate (25) can be moved up and down along a construction cylinder wall (32), having an opening (33) provided at the upper end of the construction cylinder (31) for introducing construction material into the construction cylinder (31), and having a drive unit (41), which controls the substrate plate (25) within the construction cylinder so that it can move up and down, wherein a closed circumferential wall (26) is formed, which surrounds the construction cylinder (31), and wherein the drive unit (41) is provided within the closed circumferential wall (26).
B22F 10/28 - Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
B22F 12/00 - Apparatus or devices specially adapted for additive manufacturingAuxiliary means for additive manufacturingCombinations of additive manufacturing apparatus or devices with other processing apparatus or devices
B29C 64/153 - Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
B29C 64/232 - Driving means for motion along the axis orthogonal to the plane of a layer
WELDING OPTICAL UNIT FOR THE LASER WELDING OF WORKPIECES, WITH FLEXIBLE SETTING OF THE NUMBER OF AND DISTANCE BETWEEN LASER SPOTS USING CYLINDRICAL LENSES
A welding optical unit includes a collimator for collimating a laser beam, a focusing device for focusing the laser beam toward a workpiece, an adjustable beam shaper configured to shape the laser beam. The beam shaper includes a beam subdivision assembly that includes a cylindrical lens pair comprising two cylindrical lenses with diametrically opposite focal lengths and mutually parallel optical planes. The two cylindrical lenses extend with a curve on at least one side with respect to a common refraction direction perpendicular to the optical planes, and extend translationally invariantly with respect to a common non-refraction direction parallel to the optical planes. The refraction direction and the non-refraction direction extend perpendicularly to the optical axis of the welding optical unit. The welding optical unit further includes a spot distance adjusting device configured to displace the two cylindrical lenses relative to one another with respect to the refraction direction.
The invention relates to a device (10) for the additive manufacture of a workpiece (44). The device (10) has at least one fluidizing cushion (20) in order for inert gas (16) to flow uniformly and as a block into the interior of a process chamber (12). This allows the process chamber (12) to be effectively rendered inert. A gas outlet (18) is preferably arranged opposite a gas inlet (14) with the fluidizing cushion (20). The invention also relates to a method (34) for operating such a device (10). In the method (34), the process chamber (12) is preferably rendered inert by the fluidizing cushion (20) before the additive manufacture of the workpiece (44) begins, while a pump (52) makes inert gas (16) flow through the process chamber (12) during the additive manufacture.
The invention relates to a method, in particular an LMF, SLS, or EBM method, for an additive manufacture of at least one component (19) in layers in a powder bed (15) using at least two beams (11a, 11b) which can be deflected two-dimensionally, wherein the powder bed (15) has multiple powder bed layers which are divided into multiple segments by means of multiple segmentation lines (14a, 14b) running approximately perpendicularly to the direction of a gas flow (G), wherein the gas flows in a substantially parallel manner over the powder bed (15), the at least two beams (11a, 11b) solidify the at least one component (19) to be solidified by means of a substantially equal laser load within a segment of the powder bed layer (15), and individual segmentation lines (14a, 14b) of each powder bed layer are adapted on the basis of a criterion.
The invention relates to a device (10) for selective laser melting of a near-α Ti alloy (34). The device (10) has a layer arrangement (16) with layers (14a, 14b, 18) applied on top of one another, wherein at least one of the layers (14a) has the near-α Ti alloy (34). The layer arrangement (16) is arranged on a substrate panel (12) of the device (10). A laser beam source (24) is designed to selectively melt the layers (14a, 14b, 18) using a laser beam (26). A heating unit (20) of the device (10) can introduce heat energy into an uppermost layer (18) of the layer arrangement in the direction (SR) from the substrate panel (12) to the layer arrangement (16), in order to heat the uppermost layer (18) to a temperature between 250°C and 600°C. The uppermost layer (18) is, in particular, the layer of the layer arrangement (16) at the greatest distance from the substrate panel (12).
TRUMPF ADDITIVE MANUFACTURING ITALIA S.R.L. (Italy)
TRUMPF LASER- UND SYSTEMTECHNIK GMBH (Germany)
Inventor
Michieli, Niccolò
Mantoan, Elia
Pfitzner, Dieter
Blickle, Valentin
Lampert, Bastian
Abstract
000+10+10+1) on the working plane (18), which is in view of the observer optical system (12), wherein the observer optical system (12) detects the positionings of the first predefined pattern (14a) and the second predefined pattern (14b), and wherein a control unit (5) compares the positionings of the first predefined pattern (14a) and the second predefined pattern (14b) to compute a misalignment error (16) between the first scanning unit (9a) and the second scanning unit (9b).
B29C 64/153 - Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
B29C 64/277 - Arrangements for irradiation using multiple radiation means, e.g. micromirrors or multiple light-emitting diodes [LED]
A method for welding at least two aluminum-containing components is provided. The components have an aluminum content of at least 75% by weight. The method includes subdividing an output laser beam into multiple partial beams directed onto the components, so that multiple laser spots are generated on a surface of the components, and traversing a welding contour on the surface of the components with the multiple laser spots. Laser spot centers of at least three laser spots of the multiple laser spots are arranged in a ring formation. The output laser beam is generated by a multifiber, so that each laser spot of the multiple laser spots on the surface of the components has a core portion and a ring portion, with a mean power density in the core portion being higher than a mean power density in the ring portion.
The invention relates to a method for controlling a heat input into an additively manufactured component by a laser beam, comprising the steps of: periodically scanning a surface of the component with the laser beam; detecting, during the periodic scanning, photoemissions that are emitted by a predetermined partial region of the surface that is irradiated by the laser beam; determining a periodic temperature profile of a surface temperature and average surface temperature on the basis of the detected photoemissions; calculating a deviation of the average surface temperature from an upper limit of a predetermined target temperature range and from a lower limit of the predetermined target temperature range, wherein the upper limit of the predetermined target temperature range is below the melting temperature of a material used for the component; and adapting, on the basis of the calculated deviations, an energy input into the component that is controlled by a laser controller. The invention also relates to an alternative method and to a corresponding device for controlling a heat input into a component by a laser beam.
The invention relates to a method for the heat treatment of an additively manufactured portion of a component, comprising the steps of: calculating parameters relating to irradiation of a surface of the additively manufactured portion of the component by at least one laser beam for the heat treatment of the component, wherein the parameters comprise at least a laser-beam power along a scanning path on the surface of the component, wherein the parameters are calculated in such a way as to heat up the surface to a target temperature range, and wherein an upper temperature limit of the target temperature range lies below the melting temperature of the material used for the component; activating at least one laser and a beam-controlling device for periodically scanning the surface with the at least one laser beam according to the calculated laser-beam power along the calculated scanning path. The invention also relates to a method for the additive manufacture of a component, to a corresponding device for the subsequent heat treatment of an additively manufactured portion of a component, to a corresponding computer program and to a corresponding computer-readable medium.
A method for welding at least two aluminum-containing components is provided. Each component has a content of at least 75% by weight of aluminium. The method includes subdividing an output laser beam into multiple partial beams directed onto the components such that multiple laser spots are generated on a surface of the components, and traversing a welding contour on the surface of the components with the multiple laser spots. Laser spot centers of at least three laser spots of the multiple laser spots are arranged in a ring formation. The output laser beam is generated by a multifiber such that each laser spot of the multiple laser spots on the surface of the components has a core portion and a ring portion. The welding contour is at least partially traversed by pivoting a first mirror in a controlled manner by a scanner optical unit.
An apparatus for laser processing of a workpiece is provided. The workpiece includes a transparent material. The apparatus includes a beam shaping device for forming a focus zone from an input laser beam. The focus zone is formed in elongate fashion in relation to a longitudinal axis. The focus zone has, in a plain perpendicular to the longitudinal axis, an asymmetric cross-section with a preferred direction. The apparatus further includes an actuating device for altering the preferred direction during the laser processing of the workpiece, and a control device for controlling the actuating device based on a predefined assignment specification in order to control the preferred direction by open-loop control or closed-loop control during the laser processing of the workpiece.
B23K 26/06 - Shaping the laser beam, e.g. by masks or multi-focusing
B23K 26/046 - Automatically focusing the laser beam
B23K 26/067 - Dividing the beam into multiple beams, e.g. multi-focusing
B23K 26/53 - Working by transmitting the laser beam through or within the workpiece for modifying or reforming the material inside the workpiece, e.g. for producing break initiation cracks
45.
BIPOLAR PLATE FOR A FUEL CELL AND PROCESS FOR WELDING A BIPOLAR PLATE
A method for laser welding of a bipolar plate for a fuel cell is provided. The bipolar plate includes two metallic plate parts. The method includes producing at least one continuously enclosing first weld seam with a first seam width, and producing at least one second weld seam with a second seam width. The second seam width is at least 10% greater than the first seam width.
H01S 3/102 - Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the active medium, e.g. by controlling the processes or apparatus for excitation
A method for coating a rotating surface region of a workpiece by laser build-up welding includes fusing a powdery coating material prior to impact on the workpiece in a laser beam that is directed at the surface region, capturing a spatially resolved intensity profile of thermal radiation emitted by the workpiece, comparing at least one property of the intensity profile with at least one predefined target value, and modifying at least one parameter of a coating procedure based on a result of the comparison.
B23K 31/12 - Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups relating to investigating the properties, e.g. the weldability, of materials
47.
COMPRESSED STORAGE OF INFORMATION FOR ADDITIVE MANUFACTURING
When all the figures of the drawing are considered jointly, the invention relates in summary to a method for compressing the volume of data in a file (26), for guiding a tool (16) along manufacturing coordinates for the additive manufacturing of a component (14), in a computer (27). In this case, at least one vector is determined and stored in the file (26), which vector, together with an algorithm (32), defines manufacturing parameters for filling a first region of the component (14). The algorithm (32) can be stored in the file (26) or stored in a library (30) and reference can be made to the algorithm (32) in the file (26). Alternatively or additionally, a second region of the component (14) to be filled can be defined in the file (26) by virtue of the fact that a first region is defined in the file (26) and the file (26) stores where the second region (38b) is intended to be formed and that said second region is intended to be formed in the same manner as the first region. In addition to a second region (38b), this method can be continued for any number of further regions. In a method (12) according to the invention for manufacturing the component (14), the manufacturing parameters are calculated back to manufacturing coordinates. The invention also relates to a device (10) for carrying out the method (12) for manufacturing the component (14).
G05B 19/408 - Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by data handling or data format, e.g. reading, buffering or conversion of data
G05B 19/4093 - Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by part programming, e.g. entry of geometrical information as taken from a technical drawing, combining this with machining and material information to obtain control information, named part programme, for the NC machine
G05B 19/41 - Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by interpolation, e.g. the computation of intermediate points between programmed end points to define the path to be followed and the rate of travel along that path
B29C 64/386 - Data acquisition or data processing for additive manufacturing
48.
TRANSPARENT COMPONENT WITH A FUNCTIONALISED SURFACE
The invention relates to a transparent component (1) with a functionalised surface, wherein the surface has dimples (2) and is thereby functionalised, wherein the functionalisation of the surface is an anti-glare functionalisation and the fill area of dimples is between 20% and 95%.
TRUMPF Additive Manufacturing Italia s.r.l. (Italy)
Inventor
Cavalcabo, Guglielmo
Blickle, Valentin
Sailer, Christof
Krauter, Johann
Mantoan, Elia
Abstract
A method of automated alignment of scanning optics includes the steps of irradiating an object area of a layer of a powdered material provided on a building platform with at least one irradiation beam and irradiating a calibration area of the layer with at least one irradiation beam. A first irradiation beam is guided with a first scanning optic over an intermediate top face thereby melting a first calibration pattern into the intermediate top face and a second irradiation beam is guided with a second scanning optic over the intermediate top face thereby melting a second calibration pattern into the intermediate top face. At least one image is acquired of the intermediate top face and image points related to the geometrical features of the calibration patterns are identified so that a spatial offset between the geometrical features can be derived. Based on the spatial offset, the scanning optics are aligned.
B33Y 30/00 - Apparatus for additive manufacturingDetails thereof or accessories therefor
B33Y 40/00 - Auxiliary operations or equipment, e.g. for material handling
B33Y 50/02 - Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
B22F 10/28 - Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
50.
MANUFACTURING DEVICE AND METHOD FOR THE ADDITIVE MANUFACTURING OF COMPONENTS FROM A POWDER MATERIAL AND METHOD FOR DETERMINING A CORRECTION FUNCTION FOR A MANUFACTURING DEVICE OF THIS TYPE OR A METHOD OF THIS TYPE
The invention relates to a manufacturing device (1) for the additive manufacturing of components (3) from a powder material, comprising: - a beam-generating device (5), which is designed to generate an energy beam (7) having a beam profile (8) which is not rotationally symmetrically about a beam axis (A) of the energy beam (7); - a beam-rotating device (15), which is designed to rotate the beam profile (8) of the energy beam (7) about the beam axis (A); - a scanner device (9), which is designed to move the energy beam (7) in a working region (11) and to irradiate the working region (11) locally selectively with the energy beam (7) in order to produce, by means of the energy beam (7), a component (3) from the powder material located in the working region (11); and - a control device (19), which is operatively connected to the beam-rotating device (15) and to the scanner device (9) and is designed to control the beam-rotating device (15) and the scanner device (9); wherein the control device (19) is designed to correct control of the scanner device (9) according to a current angle of rotation of the beam-rotating device (15).
A system includes an ultrashort pulse laser for providing a laser beam, a hollow core fiber, an input coupling optical unit configured to input couple the laser beam into the hollow core fiber, a lens device on which an output coupled laser beam from the hollow core fiber is incident, a beam shaping element on which the laser beam emerging from the lens device is incident, and a focusing optical unit. The lens device is configured to adjust a divergence angle of the output coupled laser beam for adjusting a beam diameter of the laser beam on the beam shaping element. The beam shaping element is configured to impose upon the laser beam a quasi-non-diffractive beam shape with a focal zone that is elongated in the beam propagation direction. The focusing optical unit is configured to set a penetration depth of the focal zone in or on the material.
B23K 26/06 - Shaping the laser beam, e.g. by masks or multi-focusing
B23K 26/0622 - Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses
52.
MEASURING DEVICE, MANUFACTURING DEVICE COMPRISING SUCH A MEASURING DEVICE, AND METHOD FOR OPERATING A MANUFACTURING DEVICE FOR GENERATIVE MANUFACTURING OF A COMPONENT PART FROM A POWDER MATERIAL
A measuring device for aligning a blueprint coordinate system with a build level coordinate system of a working region of a generative manufacturing device arranged in a build level includes a first sensor device configured to cover a first coverage region of the working region with a first measurement accuracy, a selection module configured to select at least one region of interest within the first coverage region, a second sensor device configured to cover the at least one selected region of interest with a second measurement accuracy, the second measurement accuracy being higher than the first measurement accuracy, and an alignment module configured to determine at least one alignment of the blueprint coordinate system relative to the build level coordinate system, including an angle alignment and/or a translation alignment, based on the covered region of interest.
B29C 64/393 - Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
B29C 64/153 - Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
B33Y 50/02 - Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
53.
DEVICE AND METHOD FOR ADDITIVE MANUFACTURING WITH FRESH-WATER-FREE EMERGENCY COOLING
With reference to the drawing, the invention relates in summary to an emergency cooling system (14) for a device (10), in particular in the form of a device for additive manufacturing by means of laser metal fusion. The device (10) comprises a temperature-critical component (22a) and optionally at least one further temperature-critical component (22b-d), which are disposed both on a main cooling system (12) and on an emergency cooling system (14) in order to be actively cooled by a cooling medium. The emergency cooling system (14) comprises an emergency pump (18) and a machine frame (46), which is disposed at least in portions on an emergency cooling circuit (42) and in particular also on a main cooling circuit (40). The machine frame (46) provides the mechanically necessary stability of the device (10) and, in a synergy effect, also functions as a cooling heat sink. The invention also relates to a method (54) for operating the device (10), in which a cooling medium is guided in the emergency cooling circuit (42) through the machine frame (46).
A method for producing bipolar plates for production of fuel cells includes uncoiling a first sheet metal foil from a first sheet metal foil coil, and uncoiling a second sheet metal foil from a second sheet metal foil coil, forming the first sheet metal foil and the second sheet metal foil, allocating the first sheet metal foil and the second sheet metal foil based on formed structures of the first sheet metal foil and the second sheet metal foil, and laser welding the first sheet metal foil and the second sheet metal foil transversely to a feed direction of the first sheet metal foil and the second sheet metal foil in a first joining station. The first joining station mutually compresses the first sheet metal foil and the second sheet metal foil. The method further includes removing bipolar plates from the first sheet metal foil and second sheet metal foil.
A combination device includes at least two inputs and one or more outputs. Each input is for entry of a respective input beam. Each output is for exit of a respective output beam. The combination device is configured to form the respective output beam through a coherent combination of two input beams. The combination device is configured to set a polarization direction of the respective output beam based on a relative phase position of individual phases of the two input beams from which the respective output beam is formed through the coherent combination.
A superposition device includes four inputs, each respective input for entry of a respective one of four input beams, an output for exit of an output beam, a first combination device for coherent combination of a first input beam and a second input beam to form a first superposition beam, a second combination device for coherent combination of a third input beam and a fourth input beam to form a second superposition beam, and a third combination device for forming the output beam by coherent combination of the first superposition beam and the second superposition beam. The superposition device is configured to set both a polarization direction and a power of the output beam independently of one another based on relative phase positions of individual phases of the four input beams fed to the four inputs in relation to one another.
A method for welding bar-type conductors includes arranging at least two bar-type conductors in partially overlapping fashion, and welding the at least two bar-type conductors to one another by using a processing laser beam. The processing laser beam traverses a welding contour relative to the bar-type conductors. The traversing of the welding contour includes an initial phase, a main phase and an end phase. In the initial phase, in a partial region of a beam cross section of the processing laser beam, an intensity of the processing laser beam, which is spatially averaged over the partial region, is increased over time. In the main phase, the spatially averaged intensity, which is achieved at the end of the initial phase, is kept at least substantially constant over time. In the end phase, the spatially averaged intensity, starting from the intensity at the end of the main phase, is reduced over time.
H02K 15/04 - Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of windings prior to their mounting into the machines
58.
OPTICAL ASSEMBLY FOR CONVERTING AN INPUT LASER BEAM INTO A LINEAR OUTPUT BEAM
The invention relates to an optical assembly (30) for converting an input laser beam (20) into an output beam (44), which propagates along a propagation direction (z) and which, in a working plane (48), has a beam cross-section with non-vanishing intensity that is extended along a first direction (y) and extends along a second direction (x) perpendicular to the first direction (y) and to the propagation direction (z). The invention also relates to a laser system (10) for generating radiation with an intensity distribution (L) that has a homogenised intensity profile in the beam cross-section.
BEAM-GUIDING DEVICE FOR GUIDING AN ENERGY BEAM AND MANUFACTURING DEVICE FOR ADDITIVELY MANUFACTURING COMPONENTS FROM A POWDER MATERIAL AND HAVING SUCH A BEAM-GUIDING DEVICE
The invention relates to a beam-guiding device (13) for guiding an energy beam (7) along a beam path (19), with at least one first beam-deflecting element (21), which can be moved between a first functional position and a second functional position, wherein the first beam-deflecting element (21) in the first functional position is arranged at a deflecting position (15) in the beam path (19) and is set up to deflect the energy beam (7) onto a target beam axis (A), and in the second functional position to allow the energy beam (7) to propagate further along the beam path (19), and with a plurality of second beam-deflecting elements (23), which in at least one functional state of the beam-guiding device (13) are arranged in the beam path (19) and are set up so that the energy beam (7) coming from the deflecting position (15) in the second functional position of the first beam-deflecting element (21) is thereby guided along the beam path (19) back to the deflecting position (15) and onto the target beam axis (A).
A method for laser welding includes arranging two bar-type conductors next to one another with a partial overlap, and welding the two bar-type conductors to one another using a processing laser beam. A weld bead is formed on a common base surface of the bar-type conductors. During the welding, the processing laser beam is guided so that a welding contour is placed relative to the bar-type conductors. An advancing rate of the processing laser beam along the welding contour is selected such that the weld bead has a non-liquid oxide skin inside which liquid bar-type conductor material accumulates. The non-liquid oxide skin is partially broken open by the processing laser beam only on an upwardly facing end face of the weld bead, and remains undamaged in a surrounding region of the weld bead that extends downward from the upwardly facing end face and around the entire weld bead.
An apparatus for laser machining a workpiece in a machining plane includes a first laser machining unit for forming a first focal zone which extends in a first main direction of extent, and at least one further laser machining unit for forming at least one further focal zone which extends in a further main direction of extent oriented transversely to the first main direction of extent. The first focal zone and the at least one further focal zone are spaced apart from one another parallel to the machining plane at a work distance. The first laser machining unit and the at least one further laser machining unit are movable in an advancement direction that is oriented parallel to the machining plane. The workpiece comprises a material that is transparent to a laser beam which respectively forms the first focal zone and the at least one further focal zone.
An apparatus for laser machining a workpiece with a material transparent to the laser machining includes a first beam shaping device with a beam splitting element for splitting a first input beam into a plurality of component beams, and a focusing optical unit configured to image the plurality of component beams into at least one focal zone. The first input beam is split by the beam splitting element by phase imposition on the first input beam. The component beams are focused into different partial regions of the at least one focal zone for forming the at least one focal zone. The at least one focal zone is introduced by the focusing optical unit into the material for laser machining the workpiece. Material modifications associated with a crack formation in the material are produced in the material by exposing the material to the at least one focal zone.
B23K 26/53 - Working by transmitting the laser beam through or within the workpiece for modifying or reforming the material inside the workpiece, e.g. for producing break initiation cracks
B23K 26/06 - Shaping the laser beam, e.g. by masks or multi-focusing
B23K 26/067 - Dividing the beam into multiple beams, e.g. multi-focusing
C03B 33/02 - Cutting or splitting sheet glassApparatus or machines therefor
63.
APPARATUS AND METHOD FOR LASER MACHINING A WORKPIECE
An apparatus for laser machining a workpiece includes a first beam shaping device comprising a beam splitting element for splitting a first input beam into a plurality of component beams, and a focusing optical unit configured to image the component beams into at least one focal zone. The first input beam is split by the beam splitting element by phase imposition on the first input beam. The component beams are focused into different partial regions of the at least one focal zone for forming the at least one focal zone. The at least one focal zone is introduced into the material at a work angle with respect to an outer side of the workpiece for the laser machining of the workpiece. Material modifications associated with a change of a refractive index of the material are produced in the material by exposing the material to the at least one focal zone.
B23K 26/06 - Shaping the laser beam, e.g. by masks or multi-focusing
B23K 26/359 - Working by laser beam, e.g. welding, cutting or boring for surface treatment by providing a line or line pattern, e.g. a dotted break initiation line
B23K 26/067 - Dividing the beam into multiple beams, e.g. multi-focusing
64.
METHOD AND PLANNING DEVICE FOR PLANNING A LOCALLY SELECTIVE IRRADIATION OF A WORKING AREA WITH A PLURALITY OF ENERGY BEAMS, METHOD AND MANUFACTURING DEVICE FOR THE ADDITIVE MANUFACTURING OF A COMPONENT FROM A POWDER MATERIAL, AND COMPUTER PROGRAM FOR CARRYING OUT SUCH A METHOD
The invention relates to a method for planning a locally selective irradiation of a working area (15) with a plurality of energy beams (11), in order by means of the energy beams (11) to manufacture a component (3) layer by layer from a plurality of layers of a powder material (5) arranged one after the other at successive times in a sequence of layers in the working area (15), wherein - a first displacement of a first irradiation section (19.1) for a first energy beam (11.1) of the plurality of energy beams (11) along a first irradiation area (21.1) on the working area (15) from a first starting position (23.1) to a first end position (25.1) within the first irradiation area (21.1) and - a second displacement of a second irradiation section (19.2) for a second energy beam (11.2) of the plurality of energy beams (11) in a second irradiation area (21.2) on the working area (15) from a second starting position (23.2) to a second end position (25.2) within the second irradiation area (21.2) - are coordinated with one another in such a way that • an irradiation of the second irradiation area (21.2) with the second energy beam (11.2) only begins when the first irradiation section (19.1) and the second starting position (23.2) for the second irradiation section (19.2) are not arranged relative to one another within an interaction zone (27), and that • a beginning of irradiation in the second irradiation section (19.2) is timed to be coordinated with a beginning of irradiation in the first irradiation section (19.1), wherein - an irradiation plan for the locally selective irradiation of the working area (15) with the energy beams (11) is obtained or amended.
The invention relates to a method for planning the local solidification of a layer of powder material with a when manufacturing a three-dimensional object layer by layer, the method comprising the following steps: step a): in a connected area (18(I)) of the layer (7) to be solidified, at least one inskin area (15(II)) and at least one downskin area (14(II)) is determined; step b): an inskin pattern (21) comprising inskin vectors (1', 3', 4', 6', 7', 9', 10', 12', 13') is defined for each inskin area (15(II)), and a downskin pattern (22) comprising downskin vectors (2', 5', 8', 11', 14') is defined for each downskin area (14(II)), the inskin pattern (21) being defined independently of the definition of the downskin pattern (22); step c): a processing sequence of all inskin vectors (1', 3', 4', 6', 7', 9', 10', 12', 13') and downskin vectors (2', 5', 8', 11', 14') is defined; the method is characterised in that in step c), a plurality of inskin vector blocks (23a, 23b), each comprising one or more inskin vectors (1', 3', 4', 6', 7', 9', 10', 12', 13') to be successively processed, and a plurality of downskin vector blocks (24a, 24b), each comprising one or more downskin vectors (2', 5', 8', 11', 14') to be successively processed, are defined, and a vector-block sequence for processing the inskin vector blocks (23a, 23b) and the downskin vector blocks (24a, 24b) is defined, in which vector-block sequence inskin vector blocks (23a, 23b) and downskin vector blocks (24a, 24b) alternate. This invention allows for high-quality, accelerated exposure of connected downskin areas (14(II)) and inskin areas (15(II)) to be performed while avoiding overheating of these areas.
A method for separating a workpiece includes removing material of the workpiece along a separation line by using a laser beam comprising ultrashort laser pulses of an ultrashort pulse laser. The material of the workpiece is transparent to a wavelength of the laser beam, and has a refractive index between 2.0 and 3.5. The method further includes separating the workpiece along a notch formed by the removal of the material.
Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. (Germany)
Trumpf Laser- und Systemtechnik Gmbh (Germany)
Inventor
Blothe, Markus
Chambonneau, Maxime
Nolte, Stefan
Kumkar, Malte
Abstract
The invention relates to a method for dividing a transparent workpiece (1) by means of pulsed laser radiation (2) by way of creating a beam convergence zone (3) in the volume of the workpiece, in which the intensity of the laser radiation (2) exceeds a threshold value for non-linear absorption, wherein the beam convergence zone (3) and the workpiece (1) are moved relative to each other, thereby creating a two-dimensional weakening in the workpiece (1) extending along a predetermined separating line (4), and wherein the workpiece (1) is subsequently divided along the separating line (4). The invention proposes that by selecting the duration of the energy input generated by the non-linear absorption of the pulsed laser radiation and by spatial beam shaping, non-linear propagation of the laser radiation (2) in the volume (1) of the workpiece outside the beam convergence zone (3) is suppressed.
H01L 21/78 - Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices
B23K 26/53 - Working by transmitting the laser beam through or within the workpiece for modifying or reforming the material inside the workpiece, e.g. for producing break initiation cracks
B23K 26/0622 - Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses
H01L 21/268 - Bombardment with wave or particle radiation with high-energy radiation using electromagnetic radiation, e.g. laser radiation
A method for separating a workpiece includes providing ultrashort laser pulses using an ultrashort pulse laser, and introducing material modifications into the workpiece along a separation line using the ultrashort laser pulses. The workpiece includes a transparent material. The method further includes separating the material of the workpiece along the separation line. The laser pulses form a laser beam that is incident onto the workpiece at a work angle. An optical aberration of the laser pulses during a transition into the material of the workpiece is reduced by an aberration correction device. The laser beam has a non-radially symmetric transverse intensity distribution, with the transverse intensity distribution appearing elongate in a direction of a first axis in comparison with a second axis perpendicular to the first axis.
B23K 26/0622 - Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses
B23K 26/53 - Working by transmitting the laser beam through or within the workpiece for modifying or reforming the material inside the workpiece, e.g. for producing break initiation cracks
B23K 26/06 - Shaping the laser beam, e.g. by masks or multi-focusing
B23K 26/08 - Devices involving relative movement between laser beam and workpiece
69.
Apparatus and method for laser machining a workpiece
An apparatus for laser machining a workpiece includes a beam shaping device for forming a focal zone from an input laser beam incident on the beam shaping device, and a telescope device for imaging the focal zone into a material of the workpiece. The beam shaping device is configured to impose a phase on a beam cross section of the input laser beam in such a way that the focal zone extends along a longitudinal centre axis which is curved at least in certain portions. The telescope device is assigned a beam splitting device for splitting an output laser beam output coupled from the beam shaping device into a plurality of polarized partial beams, each of which has one of at least two different polarization states. The focal zone has an asymmetrical cross section in a plane oriented perpendicular to the longitudinal centre axis.
The invention relates to a measuring device (10) for measuring a laser line beam (1) generated by a laser system (100), the measuring device (10) having: a process chamber (20) which has an entrance region (22) for entry of the laser line beam (1) into the process chamber (20), a beam profile measurement apparatus (30) which is arranged in the process chamber (20) and is designed to measure the laser line beam (1) entering the entrance region (22), and a trim device (60) for trimming the laser line beam (1) before entry into the process chamber (20). The trim device (60) has a plurality of at least three individual mirrors (64), which can be moved by at least one drive, for trimming the laser line beam (1) before entry into the process chamber (20), wherein the individual mirrors (64) can be moved at least in some regions in at least one movement direction (3) relative to a linear extent of the laser line beam (1) specified by the measuring device (10).
The invention relates to a method for operating a system (1) for the layered manufacturing of at least one object on a base element (13) by locally compacting pulverulent material (5) in a respective layer using a work laser (17), comprising the following steps: Step A) The base element (13) is arranged on a movable piston plate (12), Step B) A preliminary measurement is carried out in the system (1), a measurement pattern (24) on the upper side (23) of the base element (13) being measured using a measuring device (26), step C) based on data from the preliminary measurement, the layered manufacturing of the at least one object on the base element (13) is prepared and carried out, characterized in that, after step A) and before step B), a step A') takes place in which a surface (22) of the base element (13) facing the work laser (17) is roughened in a treatment area (21) of the base element (13) using the work laser (17) in the system (1), the treatment area (21) comprising at least part of the upper face (23) of the base element (13), and is further characterized in that, in step B), the measurement pattern (24) to be measured - comprises a light pattern (24a) which is projected at least partially into the roughened treatment area (21) onto the upper face (23) of the base element (13), and/or - comprises a base element (13) edge structure (24b) on the upper face (23) of the base element (13), the edge structure having a plurality of edges (29) and at least some of the edges (29) of the edge structure (24b) being situated in the roughened treatment area (21). The invention provides a method by means of which improved contrast during the preliminary measurements can be obtained in a simple manner.
B33Y 30/00 - Apparatus for additive manufacturingDetails thereof or accessories therefor
B33Y 50/02 - Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
72.
METHOD FOR MEASURING A BUILD PLATFORM OF A GENERATIVE MANUFACTURING DEVICE, CONTROL DEVICE FOR CARRYING OUT SUCH A METHOD, GENERATIVE MANUFACTURING DEVICE HAVING SUCH A CONTROL DEVICE, METHOD FOR THE GENERATIVE MANUFACTURING OF A COMPONENT, AND COMPUTER PROGRAM PRODUCT
The invention relates to a method for measuring a build platform (3) of a generative manufacturing device (1), comprising the following steps: - creating a first recording of the build platform (3) in a first state by means of a powder bed sensor (7) or by means of a sensor (19) for detecting remitted light (21) of an energy beam (11) in the generative manufacturing device (1); - detecting, in each case, a first marking position of at least two markings of the build platform (3) in the first recording; - comparing the first marking positions in the first state with allocated second marking positions of the same markings in a second state of the build platform (3) by means of a mathematical calculation rule, and - obtaining, from the comparison, a deviation of the first marking positions from the allocated second marking positions.
G05B 19/404 - Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by control arrangements for compensation, e.g. for backlash, overshoot, tool offset, tool wear, temperature, machine construction errors, load, inertia
A method for separating a workpiece having a transparent material includes providing ultrashort laser pulses using an ultrashort pulse laser, introducing material modifications into the transparent material of the workpiece along a separation line, and separating the material of the workpiece along the separation line. The laser pulses form a laser beam that is incident onto the workpiece at a work angle. The material modifications are Type III modifications associated with a formation of cracks in the material of the workpiece. The material modifications penetrate two sides of the workpiece that are located in intersecting planes. Separating the material of the workpiece produces a chamfer and/or a bevel. A length of a hypotenuse of the chamfer and/or bevel is between 50 μm and 5000 μm.
The invention relates to a method for separating a workpiece (104) which has a transparent material (102). Multiple focal elements (120) are provided by means of an inlet laser beam (108), and the focal elements (120) are applied to the material (102). By applying the focal elements (120) to the material (102), material modifications (138) are produced in the material (102) along a specified machining line (128), and the material (102) is separated along the machining line (128) using an etching method with a wet-chemical solution, wherein the temperature of the wet-chemical solution during the etching method equals at least 100 °C and/or maximally 150 °C.
The present invention relates to a laser system for laser cladding, comprising: a laser source for producing a laser beam (30) having a wavelength in the range between 0.4 µm and 1.5 µm; and a jet nozzle for directing the laser beam (30) at a workpiece surface (12) and for directing a powder jet comprising a pulverulent material (20) at the laser beam (30) and at the workpiece surface (12); wherein the laser beam (30) exiting from the jet nozzle has a reduced intensity in a core region (314) in comparison with an edge region (312a, 312b, 312c), and wherein the pulverulent material (20) comprises hard-material particles. The invention also relates to a method for laser cladding and to a component which can be manufactured by means of the method.
B23K 26/00 - Working by laser beam, e.g. welding, cutting or boring
B23K 26/144 - Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beamNozzles therefor the fluid stream containing particles, e.g. powder
B23K 26/323 - Bonding taking account of the properties of the material involved involving parts made of dissimilar metallic material
B23K 31/00 - Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups
B22F 10/25 - Direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS]
B33Y 30/00 - Apparatus for additive manufacturingDetails thereof or accessories therefor
B33Y 80/00 - Products made by additive manufacturing
C23C 24/10 - Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
A method for separating a workpiece having a transparent material includes providing ultrashort laser pulses using an ultrashort pulse laser, introducing material modifications into the transparent material of the workpiece along a separation line using the laser pulses, and separating the material of the workpiece along the separation line. The laser pulses form a laser beam that is incident onto the workpiece at a work angle. The material modifications are Type I and/or Type II modifications associated with a change in a refractive index of the material of the workpiece. The material modifications penetrate two sides of the workpiece that are located in intersecting planes. Separating the material of the workpiece produces a chamfer and/or a bevel. A length of a hypotenuse of the chamfer and/or bevel is between 50 μm and 500 μm.
B23K 26/40 - Removing material taking account of the properties of the material involved
B23K 26/0622 - Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses
B23K 26/06 - Shaping the laser beam, e.g. by masks or multi-focusing
B23K 26/53 - Working by transmitting the laser beam through or within the workpiece for modifying or reforming the material inside the workpiece, e.g. for producing break initiation cracks
B23K 26/38 - Removing material by boring or cutting
77.
OPTICAL ASSEMBLY FOR CONVERTING AN INPUT LASER BEAM INTO A LINEAR OUTPUT BEAM WITH INCREASED HOMOGENEITY IN THE INTENSITY CURVE
The invention relates to an optical assembly (20) for converting an input laser beam (18) into a linear output beam (12) having an intensity distribution with increased homogeneity. The invention also relates to a laser system (10) for generating a linear output beam (12) having such an intensity distribution, said laser system comprising such an optical assembly (20), and to a method for controlling a displacement device (54) on one of two lens arrays (38, 40) in an optical assembly (20).
The invention relates to a device (10) for generating a defined laser line on a working plane (24), having multiple laser light sources (12a, 12b), each of which is designed to generate a laser beam bundle (16a, 16b, 16c) with a defined divergence. The laser beam bundles (16a, 16b, 16c ) define a beam direction (z) which intersects the working plane (30) and are designed to overlap in front of the working plane (30) at a first distance (A) thereto, and the laser beam bundles (16a, 16b, 16c) have a beam profile in the region of the working plane (30), said beam profile having a long axis (LA) with a long axis beam width and a short axis (SA) with a short axis beam width perpendicularly to the beam direction (z). The device (10) additionally has a first optical assembly (14) which is designed to generate a defined beam profile in the short axis (SA) on the working plane (30). The device (10) is characterized in that it additionally comprises a second optical assembly (18) which has multiple separate second sub-units (18a, 18b, 18c) which are designed to generate a beam profile with a homogenous angle in the long axis (LA) on the working plane (30).
The invention relates to a method for producing at least one object (2) on a building platform (6) in layers by locally solidifying pulverulent material (3) in a layer (7), wherein: at least in a plurality of the layers, N high-energy beams (8a, 8b) are at least temporarily used simultaneously with N scanners, where N ≥ 2; each scanner is assigned a scanner coordinate system; a control device (10) for an exposure of a layer for each scanner - provides (102) exposure data of a machining pattern in a reference coordinate system, - converts (103) the exposure data in the reference coordinate system into exposure data in the scanner coordinate system by means of a programmed coordinate transformation (PKT) and - directs (104) the obtained exposure data in the scanner coordinate system to the associated scanner so that the scanner exposes (105) the machining pattern on the building platform in the layer; while producing the at least one object in layers, measurements are repeatedly taken, by means of each of which the current actual coordinate transformations (MTKT) of at least N-1 scanners are determined; between two successive determinations of the current actual coordinate transformations, M layers are produced, where M ≥ 2; and, while producing the at least one object, the programmed coordinate transformations for the at least N-1 scanners are updated taking into account the current actual coordinate transformations (205.1, 205.j, 205.A; 305.1, 305.j, 305.A). The invention is characterised in that a plurality of updates of the programmed coordinate transformations of the at least N-1 scanners are performed between two successive determinations (201, 206; 301, 306) of the current actual coordinate transformations. The invention provides a method which makes it possible to produce the at least one object on the building platform in layers so that the object is high-quality while minimising non-productive time.
B33Y 50/02 - Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
B29C 64/393 - Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
80.
SUCTION DEVICE FOR SUCKING UP PROCESS GAS WITH A STATIONARY GAS-CONVEYING CHANNEL AND DEVICE FOR PRODUCING THREE-DIMENSIONAL OBJECTS COMPRISING SUCH A SUCTION DEVICE
The invention relates to a suction device for sucking up process gas from a process chamber (16) of a device (11) for producing three-dimensional objects by selective solidification of a build-up material, applied in layers, by means of a beam (27) acting on the build-up material, comprising °a suction module (41) movable in translation; °a gas-conveying channel (74) arranged in a stationary manner and having a slot (72); °a connection module (70), which is connected to the suction module (41), is movable in the slot (72) of the gas-conveying channel (74), and fluidically connects the suction module (41) to the gas-conveying channel (74).
B29C 64/371 - Conditioning of environment using an environment other than air, e.g. inert gas
B29C 64/153 - Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
A method for material processing of a workpiece includes radiating a pulsed raw laser beam into an optical beam shaping system in order to form a quasi-non-diffractive laser beam with a focal zone extending in a longitudinal direction for the material processing of the workpiece. The optical beam shaping system is configured to impose a phase onto a beam cross section of the raw laser beam for forming phase-imposed laser radiation. The method further includes focusing the phase-imposed laser radiation into the workpiece so that the quasi-non-diffractive laser beam is formed and the focal zone has an intensity distribution that is adjustable along the longitudinal direction. The phase imposed on the beam cross section of the raw laser beam is set so that the intensity distribution of the quasi-non-diffractive laser beam in the focal zone is at least approximately constant in the longitudinal direction.
A method for producing a three-dimensional object by selectively solidifying a build material applied layer by layer includes, in at least one process chamber, applying the build material layer by layer to a build platform, generating at least one beam for solidifying the build material using a radiation source, feeding the at least one beam to the build material in the build platform using at least one beam guiding element, and generating a primary gas flow along the build platform using a process assistance device. The process assistance device includes a centre module and at least one outer module aligned with the centre module, so that a section over which primary gas flows is formed between the centre module and the at least one outer module. The centre module and/or the at least one outer module are triggered so as to be movable along the build platform.
A method for severing an at least partially transparent material includes focusing ultrashort laser pulses, as individual laser pulses and/or as pulse trains, in the material so that a resulting modification zone elongated in a beam propagation direction enters the material and penetrates at least one surface of the material. Each pulse train comprises multiple sub-laser pulses, The method further includes introducing a plurality of material modifications along a severing line into the material via the laser pulses, and severing the material along the severing line, A pulse energy of the individual laser pulses or a sum of pulse energies of the sub-laser pulses is in a range from 500 μJ to 50 mJ. A length of the modification zone in the beam propagation direction is greater than a thickness of the material.
A device includes a laser light source configured to generate a raw laser beam, and an optical arrangement configured to shape the raw laser beam into an illumination beam. The optical arrangement includes a beam transformer with an exit aperture, a first group of optical elements and a second group of optical elements for beam shaping. The beam transformer is configured to expand the raw laser beam in the direction of a long axis. The first group of optical elements comprises a homogenizer configured to homogenize the expanded raw laser beam. The second group of optical elements comprises at least one lens configured to image the exit aperture of the beam transformer. The first group of optical elements generates an intermediate image. The device further includes an imaging optical unit configured to image the intermediate image into the work plane.
The invention relates to a device for generating a defined laser line (12) on a working plane (14), said device comprising a laser light source (22), which is designed to generate a laser raw beam (24), and an optical arrangement (26) which receives the laser raw beam (24) and converts it along an optical axis (46) to an illumination beam (28). The illumination beam (28) defines a beam direction (29) which intersects the working plane (14) and has, in the region of the working plane (14), a beam profile (18) which has, perpendicular to the beam direction (29), a long axis having a long-axis beam width and a short axis having a short-axis beam width. The beam profile (18) can be moved relative to the working plane (14) along a movement direction (20) in order to machine a workpiece (16) with the aid of the illumination beam (28). The beam profile (18) has a defined intensity profile over the short-axis beam width, said intensity profile having a flank (48) leading in the direction of movement (20), a flank (50) trailing in the direction of movement (20) and a plateau (52) lying between the leading flank (48) and the trailing flank (50). The plateau (52) in the region of the leading flank (48) has a different intensity level than in the region of the trailing flank (50). The optical arrangement (26) furthermore has a beam transformer (30) which is designed to divide the laser raw beam (24) into a plurality of beam segments (36a, 36b) which are arranged next to one another in the long axis. In addition, the optical arrangement (26) has an optical element (56; 58) which is designed to selectively influence selected beam segments (36a, 36b).
A device (10) for mounting a large optical unit (50) comprises a carrier plate (12) and a rigid mounting face (14a) which is arranged on the carrier plate (12) and configured to mount a base surface (52) of the large optical unit (50) in a predetermined position and orientation. The rigid mounting face (14a) is also configured to mount the large optical unit (50) at a Bessel point (BP1) of the large optical unit (50). The device (10) also comprises an elastic mounting face (16a) which is arranged on the carrier plate (12) and configured to elastically mount the base surface (52) of the large optical unit (50).
The present invention relates to a line optical system (10) for generating a defined laser line (24) on a working plane (26), said line optical system comprising: at least one laser light source (12) for generating at least one laser beam (20); an optical assembly (14) which is designed to generate an illumination beam (22) along a beam path from the at least one laser beam (20), the illumination beam (22) defining a beam direction which intersects the working plane (26), the illumination beam (22) forming the defined laser line (24) in the region of the working plane (26), the optical assembly (14) having, in the beam path, a focusing unit (18) having a focusing lens (28) for focusing the illumination beam (22), the focusing lens (28) being movable parallel to the beam direction; a camera system (36) which is designed to monitor the illumination beam (22) at a defined position downstream of the focusing lens (28), the illumination beam (22) having a focus state at the defined position; and a control device (44) which is designed to readjust a position of the focusing lens (28) parallel to the beam direction based on a change in focus state at the at least one defined position.
The invention relates to a line-generating optical system (10) for generating a defined laser line (24) on a working plane (26), comprising at least one laser light source (12) for generating at least one laser beam (20); an optical assembly (14) which is designed to generate an illumination beam (22) from the at least one laser beam (20) along a beam path, wherein the illumination beam (22) defines a beam direction which intersects the working plane (26), the illumination beam (22) forms the defined laser line (24) in the region of the working plane (26), the optical assembly (14) has a focusing unit (18) with a focusing lens (28) in the beam path for focusing the illumination beam (22), and the focusing lens (28) can move parallel to the beam direction; a camera system (36) which is designed to monitor the illumination beam (22) at at least three defined positions downstream of the focusing lens (28), said illumination beam (22) having a focus state at each of the at least three defined positions; and a controller (44) which is designed to determine the position of the focus of the focusing lens (28) on the basis of the focus states at the at least three defined positions and to control the position of the focusing lens (28) parallel to the beam direction such that the focus position is arranged on the working plane (26).
A method for separating an ultrathin glass using ultrashort laser pulses of an ultrashort pulse laser includes focusing the ultrashort laser pulses into the ultrathin glass such that a resulting focal zone is elongated in a beam direction and extends over an entire thickness of the ultrathin glass. The ultrashort laser pulses have a non-radially symmetric beam cross section perpendicular to a beam propagation direction. The method further includes introducing material modifications into the ultrathin glass along a separating line using the ultrashort laser pulses focused into the ultrathin glass, and separating the ultrathin glass along the separating line.
C03B 33/02 - Cutting or splitting sheet glassApparatus or machines therefor
C03B 33/04 - Cutting or splitting in curves, especially for making spectacle lenses
B23K 26/53 - Working by transmitting the laser beam through or within the workpiece for modifying or reforming the material inside the workpiece, e.g. for producing break initiation cracks
B23K 26/0622 - Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses
B23K 26/06 - Shaping the laser beam, e.g. by masks or multi-focusing
A manufacturing method for the layer-by-layer additive manufacturing of a shaped article (10I), wherein a further layer (29a) is repeatedly added to a previous layer arrangement in the direction of a layer sequence, and in each case: VII. A new layer (22a) of a powder (17) is applied to the previous layer arrangement (13); VIII. In a melting area (23a) predetermined for the further layer (29a) and having a contour (25), the powder (17) of the new layer (22a) and at least part of the topmost layer of the previous layer arrangement (13) are melted with a first high-energy beam (24), in particular a laser beam or electron beam, is characterised in that in at least some of the further layers (29a), adding to the further layer (29a) further comprises: IX. A machining part (46) of the contour (25) is determined for the contour (25), and after step II, a second high-energy beam (31a), in particular a laser beam or electron beam, is moved along a line of travel which runs parallel to the machining part (46), as a result of which the further layer (29a) and at least part of the topmost layer of the previous layer arrangement (13) are melted along the line of travel, wherein the second high-energy beam (31a) has a second melt depth (33a) that is greater than the first melt depth (EST) of the first high-energy beam. The invention allows the surface roughness of the side faces of the shaped article to be reduced.
The invention relates to a laser deposition welding process for producing a coating layer (80) on a surface (74) of a component (70) by creating at least one coating track (86) with a predefined track width (B) on the surface (74) by applying an, in particular pulverulent, filler material (2) along a helix-shaped or spiral-shaped working trajectory (88), wherein the filler material (2) and the component (70) are heated along the working trajectory (88) by means of a laser beam (1) so that the at least one coating track (86) is formed when the filler material (2) impinges on the surface (74), wherein at least two, in particular at least three, turns (8) in the at least one coating track (86) at least partially overlap along a track width (B).
B23K 26/08 - Devices involving relative movement between laser beam and workpiece
B23K 26/144 - Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beamNozzles therefor the fluid stream containing particles, e.g. powder
B23K 26/14 - Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beamNozzles therefor
A method for laser welding two workpieces includes arranging a first workpiece of a thickness D1 and a second workpiece of a thickness D2 on top of one another so that the first workpiece and the second workpiece overlap in a region of overlap. Each of D1 and D2 is 400 μm or less. The method further includes melting, using a laser beam guided along a weld seam, a material of the first workpiece over an entirety of the thickness D1 and a material of the second workpiece over only a partial thickness TD of the thickness D2 in the region of overlap, from a side of the first workpiece. The laser beam generates a vapor capillary that extends to a capillary depth KT into the first workpiece or into the first workpiece and the second workpiece, where 0.33*EST≤KT≤0.67*EST, with EST being a weld depth EST=D1+TD.
B23K 26/082 - Scanning systems, i.e. devices involving movement of the laser beam relative to the laser head
93.
METHOD FOR LASER WELDING A BIPOLAR PLATE FOR A FUEL CELL, WITH POWER-DENSITY DISTRIBUTION VARYING CYCLICALLY OVER TIME IN THE REGION OF THE MOLTEN POOL
A method for laser welding a bipolar plate (1) for a fuel cell, wherein two plate parts (1a, 1b) are welded to one another along at least one weld seam (2, 2a, 2b, 2c), wherein the laser welding is performed with a laser beam (5), wherein the laser beam (5) has, in a plane (E) of a surface (4) of the two plate parts (1a, 1b), a basic movement component (GBK) with a rate of advancement VS in a welding direction (SR) along a welding curve (8) in relation to the plate parts (1a, 1b), and the welding curve (8) runs along the weld seam (2, 2a, 2b, 2c), wherein the laser beam (5) produces a molten pool (7) in the plate parts (1a, 1b), and the laser beam (5) brings about a power-density distribution (LDV) of laser radiation in the plane (E) of the surface (4) of the two plate parts (1a, 1b) in the region of the molten pool (7), and wherein the laser beam (5) comprises one or more part-beams (11a, 11b), is characterized in that the power-density distribution (LDV) in the plane (E) of the surface (4) of the two plate parts (1a, 1b) is varied cyclically over time in the region of the molten pool (7). The invention provides a method by which low-defect weld seams with a high level of fluid impermeability can be produced on a bipolar plate at a high welding speed.
A method for producing a three-dimensional object includes applying a build material layer by layer to a build platform, generating at least one beam for solidifying the build material, feeding the at least one beam to the build material using at least one beam guiding element, and generating a primary gas flow along the build platform using a process assistance device. The process assistance device includes a centre module and at least one outer module aligned with the centre module, so that a section over which primary gas flows is formed between the centre module and the at least one outer module. The method further includes generating a secondary gas flow that is aligned onto and fed to the build platform using a feed device above the build platform, so that a section along which the secondary gas flows is created between the feed device and the process assistance device.
B29C 64/268 - Arrangements for irradiation using laser beamsArrangements for irradiation using electron beams [EB]
95.
SUBSTRATE PLATE FOR AN INTERCHANGEABLE CONTAINER, INTERCHANGEABLE CONTAINER AND METHOD AND APPARATUS FOR UNPACKING A THREE-DIMENSIONAL OBJECT PRODUCED BY SELECTIVE SOLIDIFICATION OF A PULVERULENT BUILD MATERIAL ON A SUBSTRATE PLATE OR IN THE INTERCHANGEABLE CONTAINER
A substrate plate for an interchangeable container that can be inserted into an apparatus for layer-by-layer application and selective solidification of a pulverulent build material for producing a three-dimensional object is provided. The substrate plate includes a surface on which the three-dimensional object is built, and a connection interface situated opposite to the surface. A transmission element is capable of being connected to the connection interface. At least one actuator is capable of being connected in a force-fitting and/or form-fitting manner to the substrate plate or to the transmission element fastened to the substrate plate. The at least one actuator is capable of being excited to oscillate by a generator.
B22F 12/00 - Apparatus or devices specially adapted for additive manufacturingAuxiliary means for additive manufacturingCombinations of additive manufacturing apparatus or devices with other processing apparatus or devices
CONTAINER ARRANGEMENT OF AN UNPACKING DEVICE FOR A MANUFACTURING DEVICE, UNPACKING DEVICE HAVING SUCH A CONTAINER ARRANGEMENT, AND MANUFACTURING DEVICE
A container arrangement of an unpacking device for a manufacturing device for additive manufacturing of a three-dimensional component is provided. The container arrangement includes a construction container with a construction chamber, and a collecting container that is releasably connected to the construction container and has a collecting chamber. The construction container has a container cover that, in the closed state, seals off the construction chamber and an inert atmosphere located therein from the surroundings. A collecting-container-side part of an interior of the container arrangement is provided inside the container arrangement. The container arrangement further includes an opening device that can be used, with the collecting-container-side part of the interior of the container arrangement being filled with an inert atmosphere, to open the closed container cover of the construction container and thereby to connect the construction chamber of the construction container to the collecting chamber of the collecting container.
B22F 12/00 - Apparatus or devices specially adapted for additive manufacturingAuxiliary means for additive manufacturingCombinations of additive manufacturing apparatus or devices with other processing apparatus or devices
B22F 10/28 - Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
B22F 3/00 - Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sinteringApparatus specially adapted therefor
B29C 64/153 - Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
B29C 64/255 - Enclosures for the building material, e.g. powder containers
B29C 64/371 - Conditioning of environment using an environment other than air, e.g. inert gas
97.
LASER DEPOSITION WELDING METHOD FOR PRODUCING COATING LAYERS ON OPPOSING SURFACES OF A COMPONENT
The invention relates to a laser deposition welding method for producing coating layers (80) on opposing surfaces (74) of a component (70) in that on each surface (74), an additive material (2), in particular a pulverulent additive material, is directed onto the respective surface (74) along a processing trajectory, in particular a spiral-shaped processing trajectory, wherein the additive material (2) and the component (70) are heated along the processing trajectory by means of a laser beam (1) such that the additive material (2) connects to the component (70) upon striking the respective surface (74), and the coating layers (80) are at least temporarily simultaneously produced on the opposing surfaces (74).
B23K 26/08 - Devices involving relative movement between laser beam and workpiece
B23K 26/144 - Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beamNozzles therefor the fluid stream containing particles, e.g. powder
B23K 26/14 - Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beamNozzles therefor
A method for separating a workpiece along a separation line by using ultrashort laser pulses of a laser beam includes splitting the laser beam, using a beam splitter optical unit, into a plurality of partial laser beams. Each partial laser beam is focused by a focusing optical unit onto a surface and/or into a volume of the workpiece so that the partial laser beams are arranged next to one another and spaced apart from one another along the separation line. The method further includes implementing material ablation in the workpiece along the separation line by introducing the ultrashort laser pulses into the workpiece. The partial laser beams are repeatedly moved away from an initial position along the separation line by a deflection value and are subsequently moved back into the initial position. The deflection value is less than or equal to a distance between two adjacent partial laser beams.
The invention relates to a method for laser drilling a drilled hole into a workpiece (10), wherein at least one laser beam (20) is used for the laser drilling, wherein a laser beam cross section (30) of the at least one laser beam (20) has a central area (31) with a first laser beam profile (32) having a first mean beam intensity and an outer edge area (33), surrounding the central area (31), with a second laser beam profile (34) having a second mean beam intensity, wherein the second mean beam intensity is greater than the first mean beam intensity.
The invention relates to a method for the laser processing of a workpiece (102), which has a curved surface (104), in which method at least one focus element (122) is provided by means of an input laser beam (110), the surface (104) of the workpiece (102) is acted on by the at least one focus element (122) and the at least one focus element (122) is moved relative to the surface (104), wherein the at least one focus element (122) has an elongated shape parallel to a longitudinal central axis (145) of the at least one focus element (122), the longitudinal central axis (145) of the at least one focus element (122) is orientated transverse, and in particular perpendicular, to the surface (104) of the workpiece (102), and wherein a material (106) of the workpiece (102) is removed and/or modified on the surface (104) by means of the at least one focus element (122).
B23K 26/08 - Devices involving relative movement between laser beam and workpiece
B23K 26/352 - Working by laser beam, e.g. welding, cutting or boring for surface treatment
B23K 26/364 - Laser etching for making a groove or trench, e.g. for scribing a break initiation groove
B21B 1/22 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling bands or sheets of indefinite length
B21B 27/00 - RollsLubricating, cooling or heating rolls while in use
B23K 26/0622 - Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses
B41C 1/05 - Heat-generating engraving heads, e.g. laser beam, electron beam
patents
