EP2943297B1 - Verfahren, werkzeug und presse zur elektrohydraulischen formung eines werkstückes - Google Patents

Verfahren, werkzeug und presse zur elektrohydraulischen formung eines werkstückes Download PDF

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Publication number
EP2943297B1
EP2943297B1 EP14700188.7A EP14700188A EP2943297B1 EP 2943297 B1 EP2943297 B1 EP 2943297B1 EP 14700188 A EP14700188 A EP 14700188A EP 2943297 B1 EP2943297 B1 EP 2943297B1
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Prior art keywords
cavity
forming
shock wave
forming part
tooling
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EP14700188.7A
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English (en)
French (fr)
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EP2943297A1 (de
Inventor
Gilles Avrillaud
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ADM28 SARL
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ADM28 SARL
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/06—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure by shock waves
    • B21D26/12—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure by shock waves initiated by spark discharge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02—Stamping using rigid devices or tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/10—Stamping using yieldable or resilient pads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/22—Deep-drawing with devices for holding the edge of the blanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/30—Deep-drawing to finish articles formed by deep-drawing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/06—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure by shock waves

Definitions

  • the invention relates to a method of forming a part, in particular a piece of sheet metal, by applying a plastic deformation to a blank of material, having a reduced elastic return.
  • the invention also relates to a tool and a press used in this process.
  • stamping which consists in forcing a flat sheet blank between two forming parts (usually a punch and a matrix) each having an outer shape substantially identical to the thickness of the sheet, to the desired shape of the part to be obtained.
  • Several passes may be necessary to obtain the final shape of the part in order to distribute the deformations and avoid tearing of the sheet.
  • the stress applied to the sheet blank must exceed the elastic limit of the material used so as to cause permanent plastic deformation thereof.
  • the fraction of this stress absorbed by elastic deformation of the part induces an elastic return, particularly in the bending zones thereof, substantially modifying the dimensional characteristics obtained before unloading.
  • the present invention therefore aims to provide a method of forming a workpiece without elastic return which does not have the disadvantages of the prior art.
  • the invention aims to provide such a reduced cost method adaptable on conventional stamping presses.
  • the invention also aims to provide a forming process that allows to combine the advantages of stamping forming and electro-hydraulic forming and to reduce or even eliminate the elastic return phenomena and internal stresses generated by a stamping press classic.
  • the invention also aims to provide a forming method in a single operation, without manipulation of the part between the different steps of the process.
  • the invention also relates to a forming tool adapted for implementing the method according to the invention.
  • the invention relates to a forming tool that can be mounted on a conventional stamping press and requires only minor modifications of the working environment.
  • the invention finally relates to a stamping press adapted to receive the forming tool and implement the forming method according to the invention.
  • shock wave or pressure wave is indifferently used, it being understood that the pressure gradient of the pressure wave is sufficiently high to be assimilated to a wave of pressure. shock.
  • this method a sequence of operations similar to the sequence of operations of a conventional stamping is used, with a tooling (a punch / die pair) for which it is not necessary to modify the dimensions for compensate for springback.
  • a tooling a punch / die pair
  • this shock wave or pressure wave generated in the tool cavity passes through the wall of the tool and applies to the shaped material blank in a direction mainly orthogonal to its surface, that is to say according to its thickness.
  • the pressure wave By choosing the generation energy of the pressure wave so that the stress generated by the propagation of this wave through the materials it passes through is less than the elastic limit of the material of the tool to not damaging it and greater than the elastic limit of the material of the blank of material to be formed, the pressure wave generates in the blank of material a stress mainly orthogonal to its surface, in the plastic field, which reduces the longitudinal stresses parallel to the surface driven by the deformation of the blank of material in the tooling. This reduction of the longitudinal stresses is performed so as to compensate the longitudinal elastic return. Therefore, a possible springback occurs in the direction of the thickness of the part and causes very little deformation thereof at the opening of the tool.
  • the shock wave is generated by means of an electric arc triggered between two electrodes penetrating into the cavity.
  • a shock wave i.e., a pressure wave having a very high pressure gradient
  • This pressure wave moves away from the electric arc in all directions until it meets the inner face of the wall of the cavity. It is transmitted through this wall to the blank of material.
  • the conventional stamping process is coupled with a method derived from electrohydraulic forming, in contrast to which the shock wave does not plate the blank of material in contact with the liquid against a punch but is transmitted by the tooling.
  • the electric arc is obtained by a current pulse with an energy of between 10 and 100 kJ.
  • This energy is generated by the storage of an electric current in a battery of high voltage capacitors (from 2 kV to 300 kV, and preferably from 20 kV to 50 kV) and the rapid discharge thereof, for example by means of a spark gap, at the terminals of the electrodes.
  • a plurality of shock waves is generated sequentially, preferably two to four shock waves, without releasing the deformation pressure. It was found that depending on the material, its flatness and its deformation, the blank of material could not be in uniform contact with the forming parts despite the maintenance of the deformation pressure.
  • the application of a series of shock waves thus makes it possible to eliminate the partial contact points between the blank of material and the tooling and to obtain an orthogonal stress on the surface of the blank of material which is more homogeneous.
  • the invention also extends to a forming tool adapted for carrying out the method of forming a workpiece by plastic deformation, comprising a first forming part and a second forming part, each forming part comprising a face opposite the other part having an external shape complementary to the shape to be obtained on the part, characterized in that at least one of the forming parts comprises a cavity filled with a liquid and provided with means of generating least a wave of impact in the cavity and through a wall of said forming portion, said wall being adapted to be substantially indeformable under a deformation pressure applied between the forming parts and to have a yield strength greater than a stress generated by the shock wave.
  • a cavity filled with liquid for example water
  • the cavity is preferably closed, for example by a plug, but could also be open on a relatively small part of its area without changing its function.
  • the means for generating a shock wave comprise at least one electrode plunging into the cavity and connected to a pulsed high power generator adapted to provide a current pulse with an energy of between 10 and 100 kJ.
  • a pulsed high power generator adapted to provide a current pulse with an energy of between 10 and 100 kJ.
  • the shock wave for example by vaporization of the liquid by means of an electric arc, it suffices to have a single electrode immersed in the cavity, the second electrode being made by the wall itself of the tool of forming.
  • the tooling comprises at least one pair of electrodes passing through the wall of the cavity through insulating bushings. If it is possible to use only one electrode, it is however preferable to use two electrodes insulated from the wall of the forming tool in order to be able to adjust the inter-electrode distance and to avoid passing an electrode. electrical current in the wall of the forming tool to minimize the risk of electro-corrosion. Furthermore, depending on the size of the tool, it may be useful to have several pairs of electrodes so as to generate in parallel several shock waves from points distributed in the tooling in order to standardize the pressure wave over the entire surface of the room.
  • the electrodes of at least one pair of electrodes are connected by a metal wire adapted to be vaporized during the application of the current pulse.
  • a metal wire adapted to be vaporized during the application of the current pulse.
  • Such a filament, or thread explosive when it is crossed by a current of high intensity, vaporizes and forms a plasma which, itself, generates a large amount of gas which causes a shock wave.
  • the forming part comprising the cavity comprises means for replacing the liquid inside thereof.
  • the repetition of electrical discharges causing the shock waves, especially in series production, can cause pollution of the liquid of the cavity. It is then useful to provide the portion of the tooling comprising the cavity with means for renewing this liquid, for example by providing a water supply duct and an evacuation duct, both provided with a control valve. stop, or under permanent pressure, adapted to allow a continuous renewal or at regular intervals of the liquid contained in the cavity.
  • the invention also extends to a stamping press provided with a tool having at least one of the features mentioned above.
  • a stamping press provided with a tool having at least one of the features mentioned above.
  • a "conventional" stamping press can be used with a tool according to the invention, by adding to this press a generator of appropriate electrical pulses and a device for circulating the water in the tool cavity. . Therefore, the equipment of an existing stamping shop is possible at reduced costs and without causing major modification of the equipment.
  • the press 10 represented at figure 1 in the form of a column press comprises a frame 11 on which guide columns 12 for guiding the tools, for example a tooling door 13 adapted to slide along the columns 12 under the force of a main cylinder 14 or a blank holder 16 sliding under the effect of a secondary cylinder 15.
  • the tooling 20 consists of a first forming portion or die 21 fixed to the frame 11 and a second forming portion or punch 23 fixed on the tooling carrier 13.
  • the matrix 21 and the punch 23 have respective surfaces 22 and 24 whose shape is complementary so as to be able to deform a blank of material 18, for example a sheet metal plate, made of steel or aluminum.
  • the punch 23 comprises a cavity 26 filled with liquid 27.
  • the liquid 27 is generally water, preferably undistilled so as to have a non-zero conductivity.
  • the cavity 26 is delimited, at least opposite the matrix 21 by a thick wall 25 whose outer surface 24 defines, in cooperation with the surface 22 of the matrix 21, the shape of the part to be obtained.
  • the thickness of the wall 25 is determined according to the material of the punch and the deformation forces necessary to form the blank of material.
  • the punch 23 as the die 21 are made of hardened alloy steel, having an elastic limit of the order of 500 to 1500 MPa.
  • Two electrodes 28 penetrate inside the cavity 26 through insulating bushings 29 and dive into the liquid 27.
  • the two electrodes 28 are connected to a generator 17 of high pulsed power comprising a plurality of high voltage capacitors adapted to store a energy between 10 and 100 kJ and a means of rapid discharge of these capacitors, for example a spark gap, across the electrodes.
  • a generator 17 of high pulsed power comprising a plurality of high voltage capacitors adapted to store a energy between 10 and 100 kJ and a means of rapid discharge of these capacitors, for example a spark gap, across the electrodes.
  • a high power arc is established between the two electrodes and instantaneously vaporizes the liquid 27 in the vicinity of the electric arc, which makes it possible to generate a pressure wave presenting a very strong pressure gradient, that is to say a shock wave, at the level of the arc electric and propagates radially in all directions.
  • Electrodes are possible, such as for example using a single electrode penetrating into the cavity through a sealed passage, the second electrode being formed by the punch itself, connected to ground. It is also possible to use a coaxial cable of which a part is stripped, the ground strap and the core of the cable thus forming two electrodes. In addition, in the case of large tools, intended for stamping large parts, it may be useful to install several pairs of electrodes at different points of the cavity and to couple them either in series or in series. parallel to the same generator 17 of appropriate power, or to several generators controlled in synchronism so as to generate several shock waves in parallel to produce a resulting pressure wave uniformly covering the entire surface 24 in contact with the blank of material 18 .
  • the means for generating a shock wave may also comprise a metal filament connected between the two electrodes 28.
  • the filament also called explosive wire
  • This plasma in turn generates vaporization of the surrounding water and generates a shock wave.
  • the tool may also comprise a plurality of pairs of electrodes connected, for at least some of them, by explosive wires so as to be able to generate several successive shock waves without having to intervene on the tooling to replace the wire explosive destroyed by the first shock wave.
  • the punch 23 may also comprise liquid feed / discharge lines 27 in the cavity 26 to allow the liquid to be renewed.
  • the lines 30 may be provided with a stop valve 31 even if these valves 'stop are not absolutely necessary, the liquid in the cavity can be pressurized by a permanent supply, or even be left at atmospheric pressure.
  • the jacks of the press 10 are controlled in such a way as to keep the tooling 20 open, that is to say that the punch 23 and the blank clamp 16 are spaced from the die 21. then a blank of material 18 on the matrix 21.
  • the secondary cylinder 15 of the press is actuated so as to bring the blank clamp 16 of the matrix 21 and to hold and immobilize the blank of material 18 between the blank and the matrix.
  • step S103 the main ram 14 of the press is actuated to lower the punch 23 to the die. Under the effect of the deformation pressure P, the blank of material 18 is deformed between the punch 23 and the die 21 to acquire the desired final shape.
  • the deformation pressure P is then maintained between the punch 23 and the die 21 and, in step S104, an electric arc is triggered between the electrodes 28 so as to generate a shock wave symbolized by the arrows moving radially away from each other. the electric arc.
  • the application of an energy of the order of 50 kJ between the electrodes 28 generates a dynamic pressure wave having an amplitude of the order of 500 MPa which diffuses in the cavity 26 to to meet the inner face of the wall 25.
  • This pressure wave with some losses related to the reflections on the inner face of the wall 25, is communicated in the form of a stress to the wall 25, then to the blank of material 18 before to spread through the matrix 21 to the frame 11 of the press.
  • the stress generated in the wall 25 of the punch 23, as in the blank of material 18, by this pressure wave is of the order of 300 MPa. This stress is lower than the elastic limit of the punch material, which is greater than 700 MPa, and therefore does not cause any plastic deformation of the punch whose shape is retained.
  • Step S104 can be repeated several times, without releasing the deformation pressure P.
  • the inventors have indeed also found that during the deformation of the blank of material 18 in step S103, parasitic deformations such as weak corrugations amplitude on the surface of the formed part could prevent close contact between the punch 23 and the workpiece, thereby degrading the transmission of the orthogonal stress to the workpiece surface.
  • the application of the first shock waves during the repetition of step S104 makes it possible to improve the contact between the punch and the workpiece, by loosening the surface stresses at the contact points and by smoothing these corrugations.
  • the following shock waves make it possible to transmit the mainly orthogonal stress to the entire surface of the part.
  • a blank of material 18 aluminum 6061 T4, disc-shaped 250 mm in diameter is pressed cone-shaped 50 mm deep.
  • the elastic return is measured on the depth of the cone. It has thus been found that after a "conventional" stamping, that is to say before application of a shock wave in the tool according to the invention, the springback is of the order of 1.2 mm is almost 2.5%. After the application of a first shock wave of the order of 300 MPa, the elastic return decreases to 1%, goes to 0.6% at the second shock wave and after the application of a third wave of shock, the elastic return is only 0.02%.
  • step S104 it is possible to repeat the step S104 relatively quickly, the repetition frequency being conditioned only by the recharge of the generator 17. It is also not necessary to provide, between each repetition of step S104, handling of the workpiece, the latter remaining in the tooling 20.
  • step S104 Since the repetition of step S104 is liable to pollute the liquid 27, it can be provided to change it either after a certain number of repetitions, or by providing a permanent circulation of liquid between the pipes 30.
  • step S105 in which the cylinders 14 and 15 are actuated to raise the punch is carried out 23 and the blank greenhouse 16. It is then possible to clear the formed part, which has practically no springback.
  • the press 10 is a conventional hydraulic press, of the column press type in the example described, to which have been added the generator 17 of high pulsed power and, where appropriate, a supply circuit for the liquid 27. It is thus possible to use an existing stamping workshop without major modification of the machines for carrying out the forming method according to the invention.
  • the part of the forming tool comprising the cavity 26 is not necessarily the punch 23 but could be symmetrically the matrix 21. It will also be possible to perform the conventional stamping steps by means of one or several conventional punch (s) and use the punch 23 having the cavity 26 that during the last stamping pass or after the latter passes. However, it will be necessary to reinforce the piece 18 before generating the shock wave.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Claims (10)

  1. Verfahren zum Formen eines Teils durch plastische Verformung, wobei:
    a) eine Presse (10), ausgestattet mit einem Werkzeug (20) verwendet wird, welches einen ersten Formgebungsabschnitt (21) und einen zweiten Formgebungsabschnitt (23) umfasst, wobei jeder Formgebungsabschnitt eine dem anderen Abschnitt gegenüberliegende Fläche (22; 24) umfasst, welche eine Außenform aufweist, die einer zu erhaltenden Teileform komplementär ist,
    b) ein Materialzuschnitt (18) zwischen dem ersten und dem zweiten Formgebungsabschnitt eingeführt wird,
    c) die Presse so betätigt wird, dass ein Druck, der so genannte Verformungsdruck (P) ausgeübt wird, welcher geeignet ist, den Materialzuschnitt zwischen dem ersten und dem zweiten Formgebungsabschnitt zu verformen,
    dadurch gekennzeichnet, dass mindestens einer der Formgebungsabschnitte (21; 23) des verwendeten Werkzeugs (20) einen Hohlraum (26) umfasst, welcher mit einer Flüssigkeit (27) gefüllt und mit Mitteln (28) ausgestattet ist, welche geeignet sind, mindestens eine Stoßwelle in dem Hohlraum und durch eine Wand (25) des besagten Formgebungsabschnitts hindurch zu erzeugen, wobei die besagte Wand dazu gestaltet ist, unter dem Verformungsdruck im Wesentlichen unverformbar zu sein und eine Elastizitätsgrenze aufzuweisen, welche höher ist als eine Beanspruchung, die von der Stoßwelle in der Wand erzeugt wird,
    und dadurch, dass:
    d) der Verformungsdruck zwischen den Formgebungsabschnitten nach Verformen des Materialzuschnitts gehalten wird,
    e) in dem Hohlraum mindestens eine Stoßwelle derart erzeugt wird, dass die Stoßwelle den Materialzuschnitt (18) im Wesentlichen orthogonal zu seiner Oberfläche durchquert,
    f) der Verformungsdruck vom Materialzuschnitt gelöst und dieser ausgeworfen wird.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Stoßwelle mittels eines Lichtbogens erzeugt wird, welcher zwischen zwei, sich in den Hohlraum (26) erstreckenden Elektroden (28) ausgelöst wird.
  3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass der Lichtbogen durch einen Stromimpuls einer Energie von zwischen 10 kJ und 100 kJ erhalten wird.
  4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass nacheinander eine Mehrzahl an Stoßwellen, bevorzugt zwei bis vier Stoßwellen, erzeugt wird, ohne den Verformungsdruck zu lösen.
  5. Werkzeug (20) zum Formen eines Teils durch plastische Verformung, welches einen ersten Formgebungsabschnitt (21) und einen zweiten Formgebungsabschnitt (23) umfasst, wobei jeder Formgebungsabschnitt eine dem anderen Abschnitt gegenüberliegende Fläche (22; 24) umfasst, welche eine Außenform aufweist, die der an dem Teil zu erhaltenden Form komplementär ist, dadurch gekennzeichnet, dass mindestens einer der Formgebungsabschnitte (21; 23) einen Hohlraum (26) umfasst, welcher mit einer Flüssigkeit (27) gefüllt und mit Mitteln (28) ausgestattet ist, welche geeignet sind, mindestens eine Stoßwelle in dem Hohlraum und durch eine Wand (25) des besagten Formgebungsabschnitts hindurch zu erzeugen, wobei die besagte Wand dazu gestaltet ist, unter einem Verformungsdruck (P), welcher zwischen den Formgebungsabschnitten ausgeübt wird, im Wesentlichen unverformbar zu sein und eine Elastizitätsgrenze aufzuweisen, welche höher ist als eine von der Stoßwelle erzeugte Beanspruchung.
  6. Werkzeug nach Anspruch 5, dadurch gekennzeichnet, dass die Mittel zum Erzeugen einer Stoßwelle mindestens eine Elektrode (28) umfassen, welche in den Hohlraum (26) hineinragt und mit einem Generator (17) hoher Impulsenergie verbunden ist, welcher dazu gestaltet ist, einen Stromimpuls einer Energie von zwischen 10 kJ und 100 kJ zu liefern.
  7. Werkzeug nach Anspruch 6, dadurch gekennzeichnet, dass es mindestens ein Elektrodenpaar (28) umfasst, welches die Wand des Hohlraums (26) durch isolierende Durchführungen (29) durchquert.
  8. Werkzeug nach Anspruch 7, dadurch gekennzeichnet, dass die Elektroden (28) von mindestens einem Elektrodenpaar durch einen Metalldraht verbunden sind, welcher dazu gestaltet ist, bei Anlegen des Stromimpulses verdampft zu werden.
  9. Werkzeug nach einem der Ansprüche 5 bis 8, dadurch gekennzeichnet, dass der Formgebungsabschnitt (23), welcher den Hohlraum (26) umfasst, Mittel (30; 31) zur Erneuerung der Flüssigkeit (27) in dessen Innerem umfasst.
  10. Tiefziehpresse, dadurch gekennzeichnet, dass sie mit einem Werkzeug nach einem der Ansprüche 5 bis 9 ausgestattet ist.
EP14700188.7A 2013-01-11 2014-01-09 Verfahren, werkzeug und presse zur elektrohydraulischen formung eines werkstückes Active EP2943297B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1350270A FR3000909B1 (fr) 2013-01-11 2013-01-11 Procede, outillage et presse de formage d'une piece
PCT/EP2014/050318 WO2014108468A1 (fr) 2013-01-11 2014-01-09 Procéde, outillage et presse de formage électrohydraulique d'une pièce

Publications (2)

Publication Number Publication Date
EP2943297A1 EP2943297A1 (de) 2015-11-18
EP2943297B1 true EP2943297B1 (de) 2016-12-21

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US (1) US10201843B2 (de)
EP (1) EP2943297B1 (de)
JP (1) JP6258351B2 (de)
CN (1) CN105026066B (de)
FR (1) FR3000909B1 (de)
WO (1) WO2014108468A1 (de)

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FR3054968B1 (fr) * 2016-08-09 2019-01-25 Adm28 S.Ar.L Outil, dispositif et procede de formage electrohydraulique indirect
FR3058654B1 (fr) * 2016-11-15 2019-06-07 Adm28 S.Ar.L Procede de formage electrohydraulique et dispositif associe
FR3062586B1 (fr) * 2017-02-08 2020-02-28 Adm28 S.Ar.L Dispositif d'electrohydroformage
DE102018008672B4 (de) * 2018-11-05 2021-02-11 Max Simmel Maschinenbau GmbH Werkzeugkonzept und Verfahren zum partiellen und inkrementellen Umformen durch Elektrohydroumformung
CN110000283A (zh) * 2018-11-09 2019-07-12 南京航空航天大学 一种小圆角盒形件精确成形方法及其成形装置
FR3092504B1 (fr) * 2019-02-13 2021-01-22 Adm28 S Ar L Procédé de formage hybride et dispositif de formage correspondant
CN113002038B (zh) * 2019-12-19 2023-04-07 倍科有限公司 冲压装置以及冲压方法
KR20220056446A (ko) 2020-10-28 2022-05-06 주식회사 엘지에너지솔루션 충격파를 이용한 전지케이스 성형장치 및 이를 이용한 전지케이스 성형방법
CN114713702B (zh) * 2022-03-24 2023-05-30 华中科技大学 一种基于电爆炸的金属加工工件矫形加工装置及方法

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Also Published As

Publication number Publication date
FR3000909A1 (fr) 2014-07-18
FR3000909B1 (fr) 2015-05-15
EP2943297A1 (de) 2015-11-18
WO2014108468A1 (fr) 2014-07-17
JP6258351B2 (ja) 2018-01-10
JP2016502934A (ja) 2016-02-01
US20150360275A1 (en) 2015-12-17
CN105026066B (zh) 2017-03-22
US10201843B2 (en) 2019-02-12
CN105026066A (zh) 2015-11-04

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