A hybrid method for forming a material blank includes placing a material blank to be deformed between a die and a blank-holder. The material blank is deformed by stamping using at least one punch in order to obtain a pre-stamped material blank. A cavity, wherein, on one hand, the at least one punch having pre-stamped the material blank and, on the other, at least one pair of electrodes are located, is filled with liquid. The pre-stamped material blank is placed in contact with the liquid of the cavity, and at least one electrical discharge is generated between the at least one pair of electrodes in such a way as to deform the pre-stamped material blank against the die.
B21D 26/12 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces by applying fluid pressure by shock waves initiated by spark discharge
2.
Assembly for deforming metal parts by magnetic pulse
An assembly to deform metal parts by magnetic pulse includes an induction coil having branches connected to a power supply. The branches extend adjacent to one another to define a slot. An active portion of the coil connected to the first and second branches, an active surface of the active portion being arranged opposite a part to be deformed. The assembly includes an integral mask cooperating in a detachable manner with all or a portion of the coil when the mask is in an operating position on the coil. The mask having a shape that is at least partially complementary to the shape of the coil such that when it is in the operating position, a first portion of the mask is inserted into the slot and a second portion of the mask covers the active surface of the coil. The mask being made of an electrically insulating material.
B21D 26/14 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces applying magnetic forces
B23K 20/06 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of high energy impulses, e.g. magnetic energy
H01F 7/20 - ElectromagnetsActuators including electromagnets without armatures
3.
Methods for shaping/welding parts by means of magnetic pulse
A method for shaping a part using a magnetic pulse is provided. A thin conductive layer is positioned on the part. The part is positioned between a coil and a matrix, the conductive layer being arranged between the coil and the part. An induced current, generated by the coil, is configured: to vaporize the conductive layer generating a pressure wave in the direction of the part. Additionally, the induced current is configured to accelerate the part in the direction of the matrix in association with a magnetic field generated by the coil, pressing the part against the matrix, thereby shaping the part. Further, a method for welding a part using a magnetic pulse is provided.
B23K 20/00 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
B21D 26/14 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces applying magnetic forces
B21D 26/10 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces by applying fluid pressure by shock waves generated by evaporation, e.g. of wire, of liquids
B23K 20/06 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of high energy impulses, e.g. magnetic energy
4.
HYBRID FORMING METHOD AND CORRESPONDING FORMING DEVICE
Disclosed is a method for hybrid forming of a material blank, in which: - the material blank (2) to be deformed is placed between a die (6) and a blank holder (4); - the material blank (2) is deformed by stamping using at least one punch (26, 32) in order to obtain a pre-stamped material blank (2); - a cavity, in which both the at least one punch (26, 32) having pre-stamped the material blank (2) as well as at least one pair of electrodes (36) are located, is filled with liquid, - the pre-stamped material blank (2) is placed in contact with the liquid of the cavity, and - at least one electrical discharge is generated between at least one pair of electrodes (36) in such a way as to deform the material blank (2) against the die (6). [Fig. 1]
B21D 22/22 - Deep-drawing with devices for holding the edge of the blanks
B21D 26/10 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces by applying fluid pressure by shock waves generated by evaporation, e.g. of wire, of liquids
B21D 26/12 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces by applying fluid pressure by shock waves initiated by spark discharge
The present invention concerns a device (1) for pulsed electric discharge in a liquid comprising a control module (40) configured to control a voltage generator (20) such that the voltage generator (20) applies a predetermined heating voltage setpoint between electrodes (10) during a heating period until a pulsed electric discharge is obtained between the electrodes (10), in order to measure the breakdown voltage during the pulsed electric discharge, in order to estimate the quantity of energy supplied to the liquid during the heating period, referred to as the "quantity of heating energy", from the predetermined heating voltage setpoint and the measured breakdown voltage, and in order to determine a new heating voltage setpoint to apply between the electrodes (10) of the at least one pair of electrodes (10) at the next pulsed electric discharge based on the estimated quantity of heating energy and a predefined breakdown voltage setpoint.
G01V 1/157 - Generating seismic energy using spark dischargesGenerating seismic energy using exploding wires
B21D 26/12 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces by applying fluid pressure by shock waves initiated by spark discharge
G10K 15/06 - Sound-producing devices using electric discharge
H01H 39/00 - Switching devices actuated by an explosion produced within the device and initiated by an electric current
A61B 17/225 - Surgical instruments, devices or methods for extracorporeal shock wave lithotripsy [ESWL], e.g. by using ultrasonic waves
E21B 43/00 - Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
E21B 28/00 - Vibration generating arrangements for boreholes or wells, e.g. for stimulating production
A61B 17/22 - Implements for squeezing-off ulcers or the like on inner organs of the bodyImplements for scraping-out cavities of body organs, e.g. bonesSurgical instruments, devices or methods for invasive removal or destruction of calculus using mechanical vibrationsSurgical instruments, devices or methods for removing obstructions in blood vessels, not otherwise provided for
6.
ASSEMBLY FOR DEFORMING METAL PARTS BY MAGNETIC PULSE
The assembly (10) for deforming metal parts by magnetic pulse comprises an induction coil (20) comprising: - branches (21, 22) designed to be connected to a power supply, said branches (21, 22) extending adjacent to one another so as to define a slot (23), - an active portion connected to the first and second branches, a surface of which, referred to as an "active surface (27)," is designed to be arranged opposite a part to be deformed, the assembly (10) further comprising: an integral mask (30), configured to cooperate in a detachable manner with all or a portion of the coil (20) when the mask is in an operating position on the coil, the mask having a shape that is at least partially complementary to the shape of the coil such that when it is in the operating position, it is inserted by a first portion (31), into the slot and it covers, by a second portion (32), the active surface of the coil, the mask being made of an electrically insulating material.
B21D 26/14 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces applying magnetic forces
B23K 20/06 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of high energy impulses, e.g. magnetic energy
The present invention relates to a device (1A, 1B) for pulsed electric discharge in a liquid, said device (1A, 1B) comprising at least one pair of electrodes (10) which are configured to be immersed in said liquid and to generate an electric arc in said liquid when a predetermined voltage is applied between said electrodes (10), at least one heating unit (20) which is configured to heat said liquid for a so-called "heating" time, at least one discharge unit (30) which is configured to apply a discharge voltage between the electrodes (10) of the at least one pair of electrodes (10), and at least one control unit (40) which is configured to control the at least one heating unit (20) so that said heating unit (20) heats the liquid for the heating time and to control, at the end of said heating time, the at least one discharge unit (30) so that said at least one discharge unit (30) applies the predetermined voltage between the electrodes (10) of the at least one pair of electrodes (10) and thus generates an electric discharge in the liquid.
H03K 3/53 - Generators characterised by the type of circuit or by the means used for producing pulses by the use of an energy-accumulating element discharged through the load by a switching device controlled by an external signal and not incorporating positive feedback
8.
Method for magnetic pulse soldering of a stack of sheets
A method for the magnetic pulse soldering of an item having a stack of sheets consisting of a metal material. At least one hole through a thickness of the stack is formed. The first and second plates, both consisting of a metal material, are arranged on either side of the stack. A covering area covering at least one through-hole is formed. The plates-stack assembly is positioned opposite an active part of a coil such that a working area of the covering area faces the active part of the coil and the working area covering at least one hole. The working area is subjected to a magnetic field until the assembly is joined. While the working area is subjected to the magnetic field, pressure is exerted on the first plate, in the region of at least one hole, pressing the first plate against the second plate.
B23K 20/00 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
B23K 20/06 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of high energy impulses, e.g. magnetic energy
The invention relates to a method for assembling a ring (3) inside a tubular component (2) by magnetic pulse welding. The method involves the steps of: – reducing a thickness of the wall (20) of the tubular component (2) to form a trapezoidal recess on the periphery of a longitudinal portion (23) of the tubular component (2), – positioning a ring (3) around the tubular component (2) facing the recess, the ring (3) having a shape that compliments that of the recess, – positioning the assembly made up of tubular component (2) and ring (3) in an opening of a coil (10) in such a way that the ring (3) is positioned facing the said coil (10), – welding the assembly using magnetic pulses generated by the coil (10).
B23K 20/06 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of high energy impulses, e.g. magnetic energy
10.
DEVICE FOR INCREMENTAL STAMPING BY MAGNETIC FORMING AND ASSOCIATED METHOD
The invention relates to a device for stamping a blank (50) in order to produce a stamped part. The device includes a punch (40) comprising a bearing surface (41), an anvil (70), a die (80) and means for generating a magnetic field (60), provided in the punch, level with the bearing surface. The device is configured, in an initial position, so that: - the bearing surface of the punch receives a portion of a first face of the blank, - the anvil and the means for generating a magnetic field are placed on either side of the same portion of the blank, the means for generating a magnetic field (60) being opposite the first face (51), and the anvil (70) opposite a second face (52) of the blank, at a distance from the second face, - the die (80) is placed opposite the second face (52), level with another portion of the blank. The means for generating a magnetic field are configured to apply pressure on the blank in the direction of the anvil, in a direction Z'Z. The device includes first means (43) for moving the punch in the direction Z'Z and second means (72) for moving the anvil in the same direction.
The invention relates to a method for shaping a part (2) by means of magnetic pulse, characterized in that it includes the steps of: - positioning a thin conductive layer (40) on the part; - positioning the part between a coil (10) and a matrix, the conductive layer being arranged between the coil and the part; - generating, by means of the coil, an induced current, said induced current being configured: - to vaporize the conductive layer, generating a pressure wave in the direction of the part; and - in association with a magnetic field generated by said induction coil, to accelerate the part in the direction of the matrix (30), pressing said part against said matrix, resulting in the part being shaped. The invention also relates to a method for welding parts by means of magnetic pulse.
B21D 26/14 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces applying magnetic forces
B23K 20/06 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of high energy impulses, e.g. magnetic energy
B21D 26/10 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces by applying fluid pressure by shock waves generated by evaporation, e.g. of wire, of liquids
An electrohydraulic forming device (100) for forming a blank (160) of material, comprising: - an electrohydraulic forming chamber (110), - at least one central electrode (120) extending in a so-called longitudinal direction (XX') and comprising a first end (122) arranged inside the electrohydraulic forming chamber (110), - a body (140) provided with a bore for introducing each central electrode (120) into the electrohydraulic forming chamber, the electrohydraulic forming chamber being partially formed by said body (140), - a mould (150), and - at least one peripheral electrode (130) electrically insulated from each central electrode (120), having an end (132) arranged at a distance from and around the end (122) of a central electrode (120), said end (132) extending in a transverse plane relative to said central electrode (120).
B21D 26/12 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces by applying fluid pressure by shock waves initiated by spark discharge
13.
DEVICE FOR STAMPING BY MAGNETIC FORMING AND ASSOCIATED METHOD
The invention relates to a device (10) for stamping a blank (50) in order to produce a stamped part. The device includes a punch (21) including a bearing surface (211), an anvil (22), and means for generating a magnetic field (34). The stamping device being configured, in an initial position, so that: the bearing surface (211) of the punch (21) is intended for receiving a portion of a first surface (51) of the blank (50); the anvil and the means for generating a magnetic field are intended for being arranged on either side of another portion of the blank, with the anvil (22) facing the first surface (51), and the means for generating a magnetic field facing a second surface (52) opposite the first surface. The means for generating a magnetic field (34) are capable of applying a pressure on the blank (50) towards the anvil, in a direction ZZ'. The stamping device also includes movement means (23) arranged to move the punch (21), relative to the means for generating a magnetic field (34), in a direction opposite the direction ZZ'.
B21D 22/21 - Deep-drawing without fixing the border of the blank
B21D 26/14 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces applying magnetic forces
14.
METHOD FOR ELECTROHYDRAULIC FORMING AND ASSOCIATED DEVICE
The invention relates to a method for electrohydraulic forming a material blank (150), in which: a material blank (150) to be shaped is placed between a mould (130) and a blank holder (140); a tight cavity containing electrodes (160) is filled with liquid up to a predetermined liquid level; the material blank (150) is brought into contact with the liquid of the cavity; the material blank is hydraulically preformed; and the material blank is electrohydraulically formed. The liquid of the cavity is pressurised for the hydraulic preforming by moving all or part of one of the walls of the cavity.
B21D 26/12 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces by applying fluid pressure by shock waves initiated by spark discharge
B21D 26/023 - Deforming sheet bodies including an additional treatment performed by fluid pressure, e.g. perforating
15.
ELECTROHYDRAULIC FORMING METHOD AND ASSOCIATED DEVICE
Method for electrohydraulically forming a blank of material wherein - a blank of material to be deformed is placed between a mould and a blank holder, - a cavity containing electrodes is filled with liquid to a predetermined liquid level, - the blank of material is placed in contact with the liquid in the cavity, - a first electric discharge is generated between at least two electrodes so as to deform the blank of material against the mould, - the mould is brought nearer to the electrodes by moving the mould so as to reduce the distance between the electrodes and the blank of material to be deformed after the first electric discharge has been generated, - at least one other electric discharge is generated between at least two electrodes so as to deform the blank of material against the mould.
B21D 26/12 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces by applying fluid pressure by shock waves initiated by spark discharge
16.
METHOD FOR MAGNETIC PULSE SOLDERING OF A STACK OF SHEETS
The invention relates to a method for the magnetic pulse soldering of an item comprising a stack of sheets consisting of a metal material. The method comprises: creating at least one hole (60) through a thickness of the stack (55); arranging two plates consisting of a metal material, called a first plate (51) and a second plate (52), either side of the stack, forming a covering area (53) covering the at least one through-hole (60); positioning the plates-stack assembly opposite an active part (121) of a coil (11) such that a working area of the covering area faces the active part of the coil, said working area covering the at least one hole (60); and subjecting the working area to a magnetic field until the assembly is joined. The invention is characterised in that while the working area is subjected to the magnetic field, pressure is exerted on the first plate (51), in the region of the at least one hole (60), pressing the first plate against the second plate (52).
B23K 20/06 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of high energy impulses, e.g. magnetic energy
An indirect electrohydraulic press forming tool (110; 210) comprising: - a body (113; 213) comprising a tubular cylindrical zone (113a; 213a), - a chamber (115; 215) intended to be filled with a liquid, - two electrodes (116a, 116b; 216a, 216b), each of the electrodes having a portion arranged in the chamber (115; 215), - a punch (111; 211). The tool also comprises: - a piston (114; 214) mounted sliding in a sealed manner in the cylindrical zone and delimiting the chamber (115; 215) in a sealed manner. Moreover, the punch (111; 211) is carried by the piston (114; 214) on a face of the latter opposite the chamber (114b; 214a).
B21D 26/12 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces by applying fluid pressure by shock waves initiated by spark discharge
B30B 1/00 - Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
B21D 22/02 - Stamping using rigid devices or tools
18.
METHOD FOR JOINING VERY THICK TUBULAR PARTS BY MAGNETIC PULSES; CORRESPONDING ARTICLE
The invention relates to a method for joining two tubular parts (2, 3), an internal part (3) and an external part (2), by magnetic pulses, said external part (2) having an annular wall (20) having an outer surface (22). The method comprises the steps: of reducing, over a longitudinal portion (23) of the external part (2), a thickness of the annular wall (20) of the external part (2) such that the annular wall (20) has a decreasing thickness over said longitudinal portion, of positioning the tubular parts (2, 3) one inside the other, forming an overlap region (25) covering the longitudinal portion (23), of positioning the tubular parts (2, 3) next to a coil (10) such that the longitudinal portion (23) is disposed opposite an active part of said coil (10), and of connecting the two tubular parts (2, 3) by magnetic pulses.
B23K 20/06 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of high energy impulses, e.g. magnetic energy
The invention concerns an injection tip (20) for injecting liquid metal under pressure, suitable for being inserted between a liquid metal supply conduit (12) and an injection opening (33) of a mould (30), characterised in that it is tubular in shape, made from electrically insulating refractory material and in that it comprises a channel (22) suitable for the flow of liquid metal between a first end referred to as the upstream end (23), suitable for being connected to said conduit, and a second end, referred to as the downstream end (24), suitable for being connected to the mould, and an electromagnetic coil (26), positioned between said ends, the axis of which merges with at least a portion of the axis of the channel. The invention also concerns a casting machine using such a tip and a method for casting metal using said machine.
B22D 17/20 - AccessoriesPressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure Details
B22D 17/30 - Accessories for supplying molten metal, e.g. in rations
20.
Method for attaching a metal ring in a frame and induction coil obtained by said method
A method for attaching a metal ring (4) in a bore (3) of a frame (2) made of a different metal, wherein: the ring (4) is set in the bore (3) by way of high-energy forming suitable for urging an outer surface of the ring against the bore (3) with a speed capable of driving out any impurity from an interface between the ring and the frame; the interface between the ring (4) and the frame (2) is heated to a temperature and for a length of time that are determined in accordance with the respective materials of the ring and the frame such as to obtain diffusion welding between the outer surface of the ring and the bore. A single-turn coil for magnetic forming carried out by the method is also described.
H01F 5/02 - Coils wound on non-magnetic supports, e.g. formers
B21D 26/14 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces applying magnetic forces
H01F 41/04 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets for manufacturing coils
The invention relates to an electrohydraulic forming device (2) comprising a mould (4), a tank (6) having a first wall (8), and a first electrode (10) and a second electrode (12), both placed in the tank (6) and adapted to generate an electric discharge in order to create at least one pressure wave. According to the invention, the first wall (8) has a surface of revolution about a rotation axis, the rotation axes of the electrodes (10, 12) merging with the rotation axis of the first wall, and the first wall (8) includes a concavity oriented towards the mould (4).
B21D 26/12 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces by applying fluid pressure by shock waves initiated by spark discharge
The invention relates to an electrohydraulic forming device (2) comprising a tank (6) having an inner tank wall (18), the following elements being positioned inside the tank: a mould (10), a first electrode (11) and a second electrode (12). A first free reflector (14) is placed in the tank (6) and surrounds the mould (10), the first electrode (11) and the second electrode (12).
B21D 26/12 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces by applying fluid pressure by shock waves initiated by spark discharge
The invention relates to an electrohydraulic forming apparatus (2) comprising a mold (4) that has a top piece (6) and a bottom piece (8), a chamber (10) that includes a first region (18) and a second region (20), a mold impression (14) in the second region (20), and electrodes (16), the end (26) of each of which is located in the first region (18); a piston (30) is sealingly mounted in a duct (12) in such a way as to be translatable and separates the first region (18) from the second region (20) of the chamber (10).
B21D 26/12 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces by applying fluid pressure by shock waves initiated by spark discharge
The invention relates to an electrohydraulic forming chamber (10) for forming a workpiece (50), said chamber comprising: - a discharge frame (20) that has an inner wall (21) which delimits a discharge space (22) provided for holding a volume of fluid; - a female mold (30) comprising a forming space (32) which includes an impression (31) designed to be complementary to the shape that the workpiece is to have after being deformed; - an electrohydraulic discharge system (40); the workpiece (50) is to be placed between the discharge space (22) and the forming space (32) before the electrohydraulic discharge system is activated; as the electrohydraulic discharge system is activated, the workpiece (50) is catapulted against the impression (31) in the forming space (32) and is deformed accordingly. According to the invention, all or part of the inner wall (21) is provided with a non-metal coating (24).
B21D 26/12 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces by applying fluid pressure by shock waves initiated by spark discharge
25.
COIL FOR MAGNETIC-PULSE WELDING OF FLAT PARTS AND RELATED WELDING METHOD
The invention relates to a coil (10) for magnetic-pulse welding of parts comprising an active portion (125), one surface, referred to as the active surface (121), of which is intended to be arranged opposite one of the parts, at an area of overlap between said parts. The active surface (121) has, across the width thereof Lb, an angled profile such that said active surface is intended to have a non-zero angle in relation to a plane (XY) along which, at least at the working area, the part nearest to the active surface extends, when the parts are positioned at the coil for welding. The invention also relates to a related magnetic-pulse welding method.
B23K 20/06 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of high energy impulses, e.g. magnetic energy
The invention relates to a coil (10) for the magnetic-pulse welding of tubular parts, comprising an active portion (125) having an active surface (121) which is to be arranged opposite an area of overlap between said tubular parts, and which defines a tubular opening (12) oriented in an axial direction. The active surface (121) has a given axial length (Lb). According to the invention, the tubular opening (12) has, in the axial direction (XX'), along the axial length (Lb) of the peripheral surface, two sections (122, 124) having a constant cross-section which are connected therebetween by a section (123) having a continuously increasing cross-section. The invention also relates to a related magnetic-pulse welding method.
B23K 20/06 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of high energy impulses, e.g. magnetic energy
A method for forming a workpiece by stamping that allows spring back to be eliminated, wherein tooling (20) is used, at least one of the forming parts (21, 23) of which includes a cavity (26) filled with a liquid (27) and provided with electrodes (28) capable of generating at least one shock wave in the cavity and through the wall (25) of the forming part, a blank material (18) is deformed between the two forming parts under the action of a deformation pressure and, without releasing the deformation pressure, at least one shock wave is generated in the cavity so that the shock wave passes through the blank material orthogonal to its surface. The tooling (20) and a press (10) adapted to implement the method are also described.
B21D 26/02 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces by applying fluid pressure
B21D 26/12 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces by applying fluid pressure by shock waves initiated by spark discharge
B21D 26/06 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces by applying fluid pressure by shock waves
B21D 22/02 - Stamping using rigid devices or tools
B21D 22/10 - Stamping using yieldable or resilient pads
B21D 22/22 - Deep-drawing with devices for holding the edge of the blanks
B21D 22/30 - Deep-drawing to finish articles formed by deep-drawing
A method of assembling a first part (1) with a second part (2) having at least one crimping lip (4), a crimping anvil (3) and a crimping groove (9) designed to accept an edge (10) that is to be crimped belonging to the first part, in which method the edge that is to be crimped is introduced into the crimping groove and magnetic crimping is performed by applying to the crimping lip a magnetic field that is designed to bend the crimping lip over and close the crimping groove onto the edge that is to be crimped, characterized in that the crimping anvil has at least one inclined portion.
B23K 20/06 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of high energy impulses, e.g. magnetic energy
B21D 26/14 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces applying magnetic forces
B65D 53/06 - Sealings formed by liquid or plastic material
B21D 39/00 - Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by platingTube expanders
B21D 51/24 - Making hollow objects characterised by the use of the objects high-pressure containers, e.g. boilers, bottles
The invention relates to a method for attaching a metal ring (4) in a bore (3) of a frame (2) made of a different metal, wherein: the ring (4) is crimped in the bore (3) by means of high-energy forming suitable for urging an outer surface of the ring against the bore (3) with a speed capable of driving out any impurity from an interface between the ring and the frame; the interface between the ring (4) and the frame (2) is heated to a temperature and for a length of time that are determined in accordance with the respective materials of the ring and the frame such as to obtain diffusion welding between the outer surface of the ring and the bore. The invention also relates to a single-turn coil for magnetic forming carried out by means of said method.
B21D 26/14 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces applying magnetic forces
B23K 20/06 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of high energy impulses, e.g. magnetic energy
B23K 20/02 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of a press
An electrohydraulic forming device comprising a framework (2), a tank (4), a movable enclosure (6) comprising a cover (26), a mould (362) connected to the cover (26) by supporting means (30, 31, 32), a forming chamber (364) and a discharge chamber (344) having at least one electrode device (42), said enclosure being movable between a first position in which the tank (4) is closed by the cover (26) and a second position in which the discharge chamber (344) and the forming chamber (364) are outside the tank (4).
B21D 26/12 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces by applying fluid pressure by shock waves initiated by spark discharge
The invention relates to a method for crimping metal components using magnetic pressure forming and involving making part of a first component (1) face part of a second component (2) and in subjecting a zone (9) in which the two components face each other to a magnetic field which applies pressure to a wall (11) of one of the components (1) and presses it firmly against a wall (21) of the other component (2). The method comprises a step of local deformation of one component (2), without variation in the thickness of said component, at the facing zone (9) of the components that are to be crimped.
B21D 26/14 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces applying magnetic forces
B21D 39/04 - Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by platingTube expanders of tubes with tubesApplication of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by platingTube expanders of tubes with rods
F16L 13/14 - Non-disconnectable pipe joints, e.g. soldered, adhesive, or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling
32.
METHOD, TOOL AND PRESS FOR THE ELECTROHYDRAULIC FORMING OF A WORKPIECE
The invention concerns a method for forming a workpiece by pressing that eliminates elastic return, which involves using a tool (20) of which at least one of the forming portions (21; 23) comprises a cavity (26) filled with a liquid (27) and provided with electrodes (28) capable of generating at least one shock wave in the cavity and through the wall (25) of said forming portion, deforming a material blank (18) between the two forming portions under the effect of a deformation pressure, and generating, without releasing the deformation pressure, at least one shock wave in the cavity such that the shock wave passes through the material blank orthogonally to the surface of same. The invention also concerns a tool (20) and a press (10) suitable for implementing the method.
B21D 26/06 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces by applying fluid pressure by shock waves
B21D 26/12 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces by applying fluid pressure by shock waves initiated by spark discharge
33.
DEVICE AND METHOD FOR FORMING BY STAMPING AT HIGH SPEED
The invention relates to a device and a method for forming by stamping a curved metal sheet (14). Said device comprises: - a punch (11) made of deformable and substantially non-compressible material, - a hammer (12) designed to strike the punch (11) along the longitudinal axis (Z), - means for generating a magnetic field (13) that are designed to impart on the hammer (12) a speed (Vz) greater than a predetermined speed in this direction (Z). The device comprises a matrix (10) of predetermined shape, approximately rotationally symmetrical about a longitudinal axis (Z), and the punch (11) is rotationally symmetrical about the longitudinal axis (Z) and designed to be disposed in front of the matrix (10). The punch (11) has a longitudinal dimension (H) of the same order of magnitude as its dimension (R) perpendicular to the longitudinal axis (Z).
B21D 22/10 - Stamping using yieldable or resilient pads
B30B 1/42 - Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by magnetic means, e.g. electromagnetic
The invention relates to a method of assembling a first part (1) with a second part (2) having at least one crimping lip (4), a crimping anvil (3) and a crimping groove (9) designed to accept an edge (10) that is to be crimped belonging to the first part, in which method the edge that is to be crimped is introduced into the crimping groove and magnetic crimping is performed by applying to the crimping lip a magnetic field that is designed to bend the crimping lip over and close the crimping groove onto the edge that is to be crimped, characterized in that the crimping anvil has at least one inclined portion.
B21D 26/14 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces applying magnetic forces
B21D 39/00 - Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by platingTube expanders
B21D 51/24 - Making hollow objects characterised by the use of the objects high-pressure containers, e.g. boilers, bottles
B23K 20/06 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of high energy impulses, e.g. magnetic energy
35.
HEAD OF AN EXPLODING-WIRE ELECTROHYDRAULIC DISCHARGE DEVICE
A head of an electrohydraulic discharge device of the invention comprises: - an end of a power cable (19) having a first conductor and a second conductor, - an explosive wire (40a-d) comprising multiple segments assembled in a series, and - means (34) for connecting each of the ends of the explosive wire (40a-d) to the end of the power cable (19).
B21D 26/10 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces by applying fluid pressure by shock waves generated by evaporation, e.g. of wire, of liquids
B21D 26/12 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces by applying fluid pressure by shock waves initiated by spark discharge
patents
