EP0572301B1 - Tiefziehvorrichtung zum Ziehen von blattförmigem Material in einer elastischen Verformungsmatrize - Google Patents

Tiefziehvorrichtung zum Ziehen von blattförmigem Material in einer elastischen Verformungsmatrize Download PDF

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Publication number
EP0572301B1
EP0572301B1 EP93401288A EP93401288A EP0572301B1 EP 0572301 B1 EP0572301 B1 EP 0572301B1 EP 93401288 A EP93401288 A EP 93401288A EP 93401288 A EP93401288 A EP 93401288A EP 0572301 B1 EP0572301 B1 EP 0572301B1
Authority
EP
European Patent Office
Prior art keywords
cushion
elastic element
chamber
elastic
sliding member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP93401288A
Other languages
English (en)
French (fr)
Other versions
EP0572301A1 (de
Inventor
Michel Dittlo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Isoform SNC
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Isoform SNC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Isoform SNC filed Critical Isoform SNC
Publication of EP0572301A1 publication Critical patent/EP0572301A1/de
Application granted granted Critical
Publication of EP0572301B1 publication Critical patent/EP0572301B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/10—Stamping using yieldable or resilient pads
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49805—Shaping by direct application of fluent pressure

Definitions

  • the present invention relates to a device for stamping sheet materials on a forming matrix of elastic material.
  • FR-A-2 641 217 discloses a device for stamping sheet materials, of the type comprising a cushion made of an elastic material housed in a retention tank, means for preforming a sheet blank, constituted by an external slide carrying an upper blank holder and means for definitive forming of said sheet blank constituted by a central slide acting on a plunger.
  • This device also includes means for absorbing the excess volume of the elastic cushion relative to that determined by the surface of the finished part to be obtained.
  • This device allows the stamping of a sheet material, in particular of a material with low elongation which may in particular be a metal sheet, for example of steel.
  • This device is not limited to the stamping of metal sheets, but can be applied to plastic materials and to any other composite material.
  • the cushion of elastic material may be a composite support consisting of a substantially parallelepipedic mass based on a silicone elastomer, of low Shore hardness, possibly covered on its upper face, and on all and part of its lateral faces d '' a relatively thin casing made of a more resistant and harder material.
  • the blank holder applied to the peripheral part of the sheet blank causes the mass of the elastic cushion to creep to deform the central part of said sheet blank, while giving it, at the end of the preforming step, a surface substantially equal to the surface of the part to be obtained.
  • the descent of the plunger for the final shaping of the sheet blank causes an increase in pressure in the cushion and a difference in volume in said cushion, between the preforming step and the shaping step, which it is necessary to compensate in order avoid an increase in pressure in the cushion.
  • the device according to FR-A-2 641 217 comprises means for absorbing the excess volume of the elastic cushion generated during the application of the plunger.
  • absorption means can be moved during the final forming of the part and this movement is regulated by a regulating member constituted for example by a multi-blade brake, or a spring or even a jack.
  • This known device makes it possible to absorb large, constant and defined volume differences during the first press cycle for a geometry of the parts to be formed and at a given temperature.
  • this device has the drawback of not responding to the problems of a progressive, even small, increase in volume of the cushion.
  • This increase may be due to variations in the physical characteristics of the material constituting the cushion, such as for example a continuous heating of several tens of degrees generated by the deformation of the cushion under the action of the upper blank holder, the stroke of which may represent 20%. the empty height of the cushion during the production of parts with a high press rate, i.e. greater at about ten cycles per minute.
  • the object of the invention is the manufacture of parts with a press operating at a high rate without requiring a modification of the setting of said press during the forming operations.
  • the present invention therefore relates to a device for stamping sheet materials, of the type comprising a matrix formed by a cushion made of an elastic material, such as for example an elastomer, housed in a retention tank, means for preforming a sheet blank, constituted by an external slide carrying an upper hold-down, means for definitive forming of said sheet blank, constituted by a central slide acting on a plunger and a first means for absorbing the excess volume of the cushion relative to to that determined by the surface of the finished part to be obtained during the final forming of said part, characterized in that it comprises at least one second means of compensating for the excess volume of the cushion due to variations in the physical characteristics of the constituent material said cushion during preforming and final forming of said part.
  • a device for stamping sheet materials of the type comprising a matrix formed by a cushion made of an elastic material, such as for example an elastomer, housed in a retention tank, means for preforming a sheet blank, constituted by an external slide carrying an upper hold-down, means for
  • the stamping device shown in Figs. 1 to 3 comprises a tank 1, the central part of which constitutes a housing for a matrix formed by a cushion 2 made of an elastic material, such as for example an elastomer.
  • the stamping device comprises a body 4 carried by an external slide, not shown, and the lower part of which constitutes an upper peripheral blank holder 4a.
  • the upper peripheral blank holder 4a has external dimensions slightly smaller than the outline of the internal housing of the container 1 so as to cooperate with the frame 3 and to penetrate into said housing.
  • the body 4 has a central well inside which a plunger 5 penetrates, the underside of which constitutes an imprint corresponding to the profile of the finished part to be obtained.
  • the device also comprises a first means 10 for absorbing the excess volume of the elastic cushion 2 generated by the application of the plunger 5 by compared to that determined by the surface of the finished part to be obtained during the definitive forming of said part.
  • This means 10 is constituted, in this embodiment, by a piston 11 movable vertically constituting the bottom of the retention tank 1, which has for this purpose a central opening 1a.
  • the piston 11 has its upper surface applied against the elastic cushion 2 and cooperates with a regulating member 12 for the movement of said piston.
  • This regulating member 12 shown diagrammatically in FIGS. 1 to 3 is constituted for example by a multi-blade brake, or a spring or even a jack.
  • the body 4 is lowered by means of the external slide, not shown, from the press, so that the upper blank holder 4a comes into contact with the sheet blank 6 whose peripheral zone is progressively clamped between the lower blank holder 3 and the upper blank holder 4a to avoid scalloping.
  • the upper blank holder 4a compresses by reaction the elastic cushion 2.
  • the swelling of the central part of the sheet blank 6 is limited by the bottom of the plunger 5 in order to avoid uncontrolled deformations.
  • the regulating member 12 prevents the displacement of the movable piston 11 under the effect of the pressure exerted in the elastic cushion 2 and, consequently, prevents said elastic cushion from creeping towards the bottom.
  • the plunger 5 descends to its low position and controls the final forming of the central part of the sheet blank 6 preformed during the previous operation.
  • the regulating member 12 regulates the displacement of the piston 11 and, therefore, makes it possible to absorb the excess volume of the elastic cushion 2 generated by the application of the plunger 5.
  • the pressure generated in the cushion is maintained at an adjustment value by automatic compensation for the excess volume of said elastic cushion.
  • the device comprises at least a second means 20 for compensating for the excess volume of the elastic cushion 2.
  • This compensation means is disposed in a wall of the retention tank 1 and for example in the movable piston 11 as shown in Figs. 1 to 3.
  • the compensation means 20 comprises, on the one hand, at least one sliding member 21 housed in a chamber 22 opening into the retention tank 1 and intended to cooperate with the elastic cushion 2 and, on the other hand, a regulating member 23 for the displacement of the sliding member 21, interposed between said sliding member 21 and the bottom 22a of the chamber 22.
  • Chamber 22 can be open on the corresponding wall of the retention tank 1 or closed at the level of said wall by an elastic membrane 24 so as to seal the elastic cushion 2 relative to the device.
  • the sliding member 21 is formed by a substantially flat soleplate comprising a face 21a flush with the corresponding wall of the retention tank 1 and comprising at its periphery at least one shoe 25 for guiding said soleplate 21 in the chamber 22.
  • These pads are made of a material having good resistance to friction and are fixed in periphery of said sole 21 by means of screws 25a.
  • the chamber 22 is extended by a recess 26.
  • the regulating member 23 is formed by an elastic element 23a which cooperates with a means 30 for prestressing said elastic element.
  • the means 30 for prestressing the elastic element 23a is formed by a rod 31 subject to said elastic element 23a and for example passing through this elastic element 23a and of which a first end 31a is connected to the sole 21, for example by a thread , and a second end 31b of which is provided with an adjustment nut 32 bearing on a plate 33 interposed between the elastic element 23a and the bottom 22a of the chamber 22.
  • a washer 34 is placed between the plate 33 and the adjusting nut 32 and this adjusting nut 32 is blocked by a lock nut 35.
  • the adjusting nut 32 and the lock nut 35 are arranged in the recess 26.
  • the elastic element 23a can be formed for example by a rubber or elastomer block or by a spring or even by a gas spring.
  • the regulating member 23 can be formed by a hydraulic system connected to an accumulator for adjusting the pressure or by a pneumatic system.
  • This regulating member 23 regulates the movement of the sliding member 21 which has a given stroke whose extreme positions correspond to a minimum determined pressure and to a maximum determined pressure of the material constituting the elastic cushion 2.
  • the compensation means thus described makes it possible to obtain an automatic adjustment of the pressure and of the volume of the elastic cushion 2 as the press operates.
  • the stamping device may include one or more compensation means placed on a part of the bottom of the retention tank or on one of its side walls.
  • the means for compensating for the excess volume of the cushion due to variations in the physical characteristics of the material constituting said cushion can be placed at the bottom of the retention tank or at one of its side walls.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Presses And Accessory Devices Thereof (AREA)

Claims (14)

  1. Vorrichtung zum Tiefziehen blatt-, blech- oder folienförmiger Materialien mit einer Matrize aus einem Kissen (2) aus einem elastischen Material, beispielsweise einem Elastomer, das in einem Aufnahmekasten (1) angeordnet ist, einer Einrichtung zur Vorumformung einer Platine (6), wobei die Einrichtung durch einen äusseren Stempel gebildet wird, der stirnseitig einen Niederhalter (4a) aufweist, einer Einrichtung zur Fertigumformung der Platine (6), wobei die Einrichtung durch einen zentralen Stempel gebildet wird, der einen Stössel (5) betätigt, und einer ersten Einrichtung (10) zur Aufnahme des verdrängten Volumens des Kissens (2) relativ zu dem Volumen, das durch die Oberfläche des fertigen während der Fertigumformung erhaltenen Werkstücks bestimmt wird,
    gekennzeichnet durch
    mindestens eine zweite Einrichtung (20) zum Ausgleich des aufgrund der Veränderungen der physischen Eigenschaften des Materials des Kissens (2) während der Vorfumformung und der Fertigumformung des Werkstücks verdrängten Volumens des Kissens (2).
  2. Vorrichtung nach Anspruch 1,
    dadurch gekennzeichnet,
    daß die Einrichtung (20) zum Ausgleich in einer Wand des Aufnahmekastens (1) angeordnet ist.
  3. Vorrichtung nach Anspruch 1 oder 2,
    dadurch gekennzeichnet,
    daß die Einrichtung (20) zum Ausgleich zum einen mindestens ein verschiebbares Organ (21), das in einer Kammer (22) die in den Aufnahmekasten (1) mündet, angeordnet ist, wobei das Organ mit dem Kissen (2) zusammenwirken kann, und zum anderen ein Regelorgan (23) zur Regulierung der Bewegung des verschiebbaren Organs (21) aufweist, das zwischen dem verschiebbaren Organ (21) und dem Boden (22a) der Kammer (22) angeordnet ist.
  4. Vorrichtung nach Anspruch 2 oder 3,
    dadurch gekennzeichnet,
    daß die Kammer (22) sich zur Wand des Aufnahmekastens (1) hin öffnet.
  5. Vorrichtung nach Anspruch 2 oder 3,
    dadurch gekennzeichnet,
    daß die Kammer (22) bündig zur Wand des Aufnahmekastens (1) durch eine elastische Membran (24) abgeschlossen ist.
  6. Vorrichtung nach Anspruch 2 oder 3,
    dadurch gekennzeichnet,
    daß das verschiebbare Organ aus einer insbesondere ebenen Platte (21) besteht, mit einer Vorderseite (21a), die mit der Wand des Aufnahmekastens (1) bündig abschließt.
  7. Vorrichtung nach Anspruch 6,
    dadurch gekennzeichnet,
    daß die Platte (21) im Randbereich mindestens ein Gleitelement (25) zur Führung der Platte in der Kammer (22) aufweist.
  8. Vorrichtung nach Anspruch 3,
    dadurch gekennzeichnet,
    daß das Regelorgan (23) durch ein elastisches Element (23a) gebildet wird.
  9. Vorrichtung nach Anspruch 8,
    dadurch gekennzeichnet,
    daß das elastische Element (23a) mit einer Einrichtung (30) zur Vorspannung des elastischen Elements zusammenwirkt.
  10. Vorrichtung nach einem der vorstehenden Ansprüche,
    dadurch gekennzeichnet,
    daß die Einrichtung zur Vorspannung durch einen Gewindebolzen (31) gebildet wird, der am elastischen Element (23a) befestigt ist und dessen erstes Ende (31a) mit der Platte (21) verbunden ist und dessen zweites Ende (31b) mit einer Stellschraube (32) versehen ist, die an einer Scheibe (33) zur Anlage bringbar ist, die zwischen dem elastischen Element (23a) und dem Boden (22a) der Kammer (22) angeordnet ist.
  11. Vorrichtung nach einem der Ansprüche 8 bis 10,
    dadurch gekennzeichnet,
    daß das elastische Element (23a) durch einen Kautschuk- oder Elastomerblock gebildet wird.
  12. Vorrichtung nach einem der Ansprüche 8 bis 10,
    dadurch gekennzeichnet,
    daß das elastische Element (23a) durch eine Feder gebildet wird.
  13. Vorrichtung nach Anspruch 3,
    dadurch gekennzeichnet,
    daß das Regelorgan (23) durch ein hydraulisches System gebildet wird, das mit einem Druckregelspeicher verbunden ist.
  14. Vorrichtung nach Anspruch 3,
    dadurch gekennzeichnet,
    daß das Regelorgan (23) durch ein pneumatisches System gebildet wird.
EP93401288A 1992-05-27 1993-05-18 Tiefziehvorrichtung zum Ziehen von blattförmigem Material in einer elastischen Verformungsmatrize Expired - Lifetime EP0572301B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9206502 1992-05-27
FR9206502A FR2691653B1 (fr) 1992-05-27 1992-05-27 Dispositif d'emboutissage de matériaux en feuille sur une matrice de formage en matériau élastique.

Publications (2)

Publication Number Publication Date
EP0572301A1 EP0572301A1 (de) 1993-12-01
EP0572301B1 true EP0572301B1 (de) 1996-07-24

Family

ID=9430242

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93401288A Expired - Lifetime EP0572301B1 (de) 1992-05-27 1993-05-18 Tiefziehvorrichtung zum Ziehen von blattförmigem Material in einer elastischen Verformungsmatrize

Country Status (7)

Country Link
US (1) US5361617A (de)
EP (1) EP0572301B1 (de)
JP (1) JPH07275962A (de)
CA (1) CA2096461A1 (de)
DE (1) DE69303773T2 (de)
ES (1) ES2090906T3 (de)
FR (1) FR2691653B1 (de)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2595448B2 (ja) * 1993-07-14 1997-04-02 日本製紙株式会社 パルプモールド型の製造方法
FR2715335B1 (fr) * 1994-01-21 1996-04-05 Lorraine Laminage Dispositif d'emboutissage d'un flan de tôle.
DE29506877U1 (de) * 1995-04-24 1995-06-22 Trumpf Gmbh & Co, 71254 Ditzingen Bearbeitungsmaschine insbesondere zum Umformen von Werkstücken
EP0888833A1 (de) * 1997-07-04 1999-01-07 Humard Automation SA Verfahren und Vorrichtung zum unterschiedlichen und/oder nacheinanderfolgenden Stanzen in mindestens zwei unterschiedlichen Richtungen
KR100284270B1 (ko) * 1998-09-23 2001-03-02 김태선 형틀과합성고무판재를이용한금속판재의입체무늬형성용가압성형장치및그방법
DE10016804B4 (de) * 2000-04-05 2004-11-11 Thyssenkrupp Stahl Ag Verfahren und Vorrichtung zum Herstellen von Bauteilen aus einer tiefziehbaren Platine
US6233989B1 (en) 2000-10-13 2001-05-22 Changing Paradigms, Llc Method and apparatus for stamping a metal sheet with an apertured design having rolled edges
WO2012151416A1 (en) * 2011-05-03 2012-11-08 Kairis Paul R Cover for striking device for percussion instrument
DE202012003953U1 (de) 2012-04-20 2012-07-13 Michael Konrath Anschlagstock
CN103331935A (zh) * 2013-06-23 2013-10-02 苏州腾行精密模具有限公司 一种对称孔位冲模模具
CN105013918A (zh) * 2015-07-02 2015-11-04 奇瑞汽车股份有限公司 复杂型面板材拉延模及其控制方法
CN111842637B (zh) * 2020-07-03 2023-07-14 北京航星机器制造有限公司 一种钛合金深腔构件复合成形模具及成形方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2462262A1 (fr) * 1979-07-31 1981-02-13 Bretagne Atel Chantiers Presse a emboutir
FR2564339B1 (fr) * 1984-05-17 1987-12-24 Usinor Procede et dispositif d'emboutissage de toles.
FR2590814B1 (fr) * 1985-12-04 1988-02-26 Usinor Procede et dispositif d'emboutissage de toles a faible allongement
FR2641217B1 (fr) * 1988-12-30 1994-04-01 Isoform Procede et dispositif d'emboutissage de materiaux en feuille sur une matrice de formage elastique
SU1683841A1 (ru) * 1989-01-03 1991-10-15 Научно-исследовательский институт средств автоматизации Устройство дл штамповки эластичной средой

Also Published As

Publication number Publication date
FR2691653A1 (fr) 1993-12-03
ES2090906T3 (es) 1996-10-16
DE69303773T2 (de) 1997-03-20
US5361617A (en) 1994-11-08
JPH07275962A (ja) 1995-10-24
DE69303773D1 (de) 1996-08-29
FR2691653B1 (fr) 1994-08-26
EP0572301A1 (de) 1993-12-01
CA2096461A1 (fr) 1993-11-28

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