EP0380894B1 - Vorrichtung zum Tiefziehen von Blattmaterialien - Google Patents

Vorrichtung zum Tiefziehen von Blattmaterialien Download PDF

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Publication number
EP0380894B1
EP0380894B1 EP89403591A EP89403591A EP0380894B1 EP 0380894 B1 EP0380894 B1 EP 0380894B1 EP 89403591 A EP89403591 A EP 89403591A EP 89403591 A EP89403591 A EP 89403591A EP 0380894 B1 EP0380894 B1 EP 0380894B1
Authority
EP
European Patent Office
Prior art keywords
blank
sheet
supporting
constituted
holding element
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
EP89403591A
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English (en)
French (fr)
Other versions
EP0380894A1 (de
Inventor
Gabriel De Smet
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
Original Assignee
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
Priority to AT89403591T priority Critical patent/ATE75640T1/de
Publication of EP0380894A1 publication Critical patent/EP0380894A1/de
Application granted granted Critical
Publication of EP0380894B1 publication Critical patent/EP0380894B1/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, in particular extra-thin sheets of large dimensions.
  • FR-A-2 564 339 discloses a drawing process on an elastic cushion.
  • the sheet to be formed is placed on an elastic cushion, an external slider is applied supporting a blank holder on the peripheral part of the sheet so as to cause the mass of the elastic cushion to creep in order to deform the central part of the sheet by giving it, at the end of the preforming step, a surface substantially equal to the surface of the finished part to be obtained, then a central slide acting by a punch is applied to the central part of the sheet to conform the part to its final form.
  • This process allows the drawing of a sheet material, in particular of a material with low elongation, which can in particular be a metal sheet, for example of steel, although this process is not limited to the drawing of metallic foil, but can be applied to plastic materials and any other composite material.
  • the cushion of elastic material is described as being in particular a composite support consisting of a substantially parallelepiped mass based on a silicone elastomer of low Shore hardness, which can be covered on its upper face and on all or part of its faces. sides of relatively thin skin made of a more resistant and harder material.
  • FR-A-2,590,814 is a drawing process on an elastic cushion, according to which the sheet metal blank to be formed is placed on a support constituting a retention tank for the elastic cushion, a clamp is applied.
  • blank on the peripheral part of the sheet blank so as to achieve, in localized areas the falling of the edge of the sheet blank and to cause the creep of the mass of the elastic cushion to deform the central part of the sheet blank, then apply a punch on the central part of the sheet blank to form the part in its final shape.
  • the present invention aims to remedy these drawbacks and to improve the efficiency and the longevity of the cushion of elastic material and possibly favors the falling of the edge of the blank of sheet metal, total or partial, to obtain deep-drawn parts of medium depth, but of large dimensions and in large series such as automobile parts, the central parts of which are practically never forms of revolution, but represent complex shapes which cannot be developed.
  • the subject of the invention is therefore a device for stamping sheet materials, in particular sheet blanks, comprising a cushion made of an elastic material housed in a retention tank, means for preforming the sheet blank consisting of an external slide. carrying an upper blank holder, and means for definitive forming of said sheet blank formed by a central slide acting on a punch, characterized in that it comprises a lower blank holder constituted by a support and holding member at least part of the sheet blank, placed directly on the elastic cushion and cooperating with the upper blank clamp to clamp at least in localized areas the sheet blank.
  • the device includes compensation elements.
  • the stamping device shown in Figures 1 to 4 comprises a tank 1, the central part of which constitutes a housing for a cushion 2 in one elastic material.
  • a frame 3 On the upper face of the elastic cushion 2 is disposed a frame 3 with a closed contour which constitutes a lower peripheral blank holder and which substantially follows the contour of the internal housing of the container 1 so as to be able to penetrate into said housing when the room.
  • the stamping device comprises a body 5 fixed to an extension 11 carried by an external slide 28.
  • the lower part 6 of the body constitutes an upper peripheral blank holder.
  • the upper peripheral blank holder 6 has an outside diameter 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 5 has a central well 7 inside which penetrates a punch 8 comprising at its upper part a sole 9.
  • the extension 11 also includes a central well for the passage of a punch 8 and the sole 9.
  • the underside of the punch 8 has an imprint corresponding to the profile of the finished part to be obtained.
  • the forming of a sheet blank 10 is carried out as follows.
  • the sheet metal blank 10 is placed on the frame 3, then the external slide 28 of the press (FIG. 2) comes into contact with the extension 11.
  • the external slide 28 descends gradually, which causes, by the intermediary of the elevation 11, the descent of the body 5 and therefore of the upper peripheral blank holder 6.
  • the latter comes into contact with the sheet blank 10 whose peripheral part is progressively clamped between the upper blank holder 6 and the frame 3 to avoid its scalloping and simultaneously compresses by reaction the elastic cushion 2.
  • the elastic cushion 2 under the effect of this peripheral compression action acts on the central zone of the sheet blank 10 and causes the preforming of said blank.
  • the swelling of the central part of the sheet blank is limited by the bottom of the punch 8 in order to avoid uncontrolled erratic deformations.
  • the descent of the riser 11 is limited by balusters 12.
  • Figure 4 shows the final shaping stage of the part.
  • the central slide 30 of the press comes into contact with the sole 9 of the punch 8 and causes the descent of said punch to its low position which at the same time drives the upper peripheral blank holder 6 via the rods 13 (FIG. 4) for the final forming of the sheet blank 10, preformed during the previous step.
  • the combination of the upper peripheral blank holder 6 and the lower peripheral blank holder formed by the frame 3 makes it possible to have sufficient rigidity to maintain the sheet blank in the area under blank holder during the preforming and shaping steps. .
  • Release stage of finished part is carried out by simultaneously raising the central slide 30 and the external slide 28 which drives the body 5 by means of the extension 11, in turn driving the punch 8 via the rods 13 and the sole 9.
  • the lower peripheral blank holder arranged on the elastic cushion 2 is constituted by a frame 21 with a closed contour which has an appropriate part in shape 21a corresponding to the profile of the peripheral zone of the finished part. to obtain.
  • the device also comprises, as in the previous variant, a body 22 carried by an external slide 28 and the lower part of which constitutes an upper peripheral blank holder 23.
  • the body 22 is provided with a well 24 inside which penetrates a punch 25 having on its lower face an imprint corresponding to the profile of the finished part to be obtained.
  • the punch 25 has a sole 26 at its upper part.
  • An extension 27 is integral with the body 22 and also includes a central well for the passage of the punch 25.
  • the forming of a sheet blank 20 is carried out as follows.
  • the sheet blank 20 is placed, which rests on the zones 1a and on the connected part 21a of the frame 21.
  • the external slide 28 of the press acts on the body 22 by means of the riser 27.
  • the descent of the external slide 28 is progressively continued so that the upper blank holder 23 of the body 22 causes in localized areas 1a , the falling of the edge of the sheet blank which folds back.
  • the swelling of the central part of the sheet blank is limited by the bottom of the punch 25 in order to avoid uncontrolled erratic deformations.
  • the descent of the riser 27 and of the outer slide 28 is limited by small columns 29.
  • the central slide 30 of the press comes into contact with the sole 26 of the punch 25 and causes the descent of said punch which at the same time drives the upper peripheral blank holder 23 via the rods 13 (FIG. 8) for the final forming of the central part of the sheet blank 20.
  • the lower peripheral blank holder disposed on the elastic cushion 2 is formed by a frame 41 which has on two opposite branches an appropriate shape 41a in convex relief whose height corresponding to the profile of the peripheral zone of the finished part 40 obtained after forming.
  • the device comprises, as for the previous variants, a body 42, the lower part of which forms the upper blank holder 43, a punch 44 and an extension 45.
  • the preforming and the forming of the sheet are carried out in the same way.
  • the lower peripheral blank holder arranged in the tray 1 above the elastic cushion 2 is constituted by a frame 51 having a cross-section.
  • This frame 51 also has on two opposite branches an appropriate shape 51a in convex relief.
  • the device also includes at least one compensation element.
  • This compensating element is to reduce the volume between the upper surface of the elastic cushion 2 and that of the sheet blank pinched between the upper blank holder and the lower blank holder formed by the frame, so as to cause initiation. of the preforming phase from the start of the descent of the upper blank holder.
  • a form of compensation 52 is interposed between the bottom of the tank 1 and the elastic cushion 2.
  • the form of compensation 52 is in this case formed by an incompressible block and has a profile corresponding substantially to the frame profile 51.
  • This arrangement makes it possible to preform the elastic cushion 2 so that it matches the shape of the frame 51 and thus to avoid excessive deformation of said elastic cushion during the preforming and the forming of the part 50.
  • the device obviously includes a body 53, the lower part of which forms the upper blank holder 54, a punch 55, and an extension 56.
  • the lower peripheral blank holder also consists of a frame 51 having a cross-section. But in this case, the volume between the upper face of the elastic cushion 2 and the frame 51 is filled by a compensation element 60.
  • This compensation element consists of a small cushion of elastic material of the same nature as the cushion 2.
  • the compensation elements 52 and 60 therefore have the purpose of reducing the volume between the sheet and the elastic cushion, and thus causing the initiation of the preforming phase from the start of the action of upper blank holder on the ring. .
  • the lower peripheral blank holder according to the invention has a shaped surface profile corresponding substantially to the profile of the peripheral zone of the finished part to be obtained and a section of constant thickness in shape or not. . It can also be used as an ejection system for the finished part.
  • this lower blank holder can be constituted by judiciously independent elements. distributed around the periphery of the elastic cushion and in areas where the peripheral area of the sheet blank must be tight.
  • the device according to the invention therefore makes it possible to effectively maintain the peripheral zone of the part during the forming operations and to improve the efficiency and the longevity of the cushion of elastic material for producing deep-drawn parts of medium depth, but of large dimensions.
  • the central parts of which are practically never forms of revolution, but represent complex shapes which cannot be developed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Claims (12)

1. Vorrichtung zum Tiefziehen von Blattmaterial, insbesondere Ziehplatinen (10, 20, 40, 50), mit einem in einem Rückhaltebehälter (1) aufgenommenen Kissen (2) aus elastischem Material, Mitteln zum Verformen der Ziehplatine, die durch einen äußeren Preßstempel (28) gebildet sind, welcher einen oberen Blechhalter (6-23-43-54) trägt, und Fertigformmitteln für die Ziehplatine, welche durch einen auf einen Dorn (8-25-44-55) wirkenden Mittelstempel (30) gebildet sind, dadurch gekennzeichnet, daß sie einen unteren Blechhalter aufweist, der durch ein Element (3,21,41, 51) zum Abstützen und Halten wenigstens eines Teils der Ziehplatine (10, 20, 40, 50) gebildet ist, welcher direkt auf dem elastischen Kissen (2) angeordnet ist und mit dem oberen Blechhalter (6-23-43-54) für ein Einklemmen der Ziehplatine wenigstens in örtlich beschränkten Zonen zusammenwirkt.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Abstütz- und Halteelement (3-21-41-51) ein Oberflächenprofil in einer Form hat, die dem Profil der Randzone des zu gewinnenden Fertigteils entspricht.
3. Vorrichtung nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß das Abstütz- und Halteelement (3, 21, 41, 51) einen in der Form konstanten Dickenquerschnitt hat oder nicht.
4. Vorrichtung nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß das Abstütz- und Halteelement (3, 21, 41, 51) einen veränderlichen Dickenquerschnitt hat.
5. Vorrichtung nach einem vorstehenden Ansprüche, dadurch gekennzeichnet, daß das Abstütz- und Halteelement durch einen Rahmen (3, 21, 41, 51) mit geschlossener Kontur gebildet ist.
6. Vorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß das Abstütz- und Halteelement (3, 21, 41, 51) durch unabhängige Elemente gebildet ist, die in den Klemmzonen der Ziehplatine angeordnet sind.
7. Vorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß das Abstütz- und Halteelement (51) einen Querschnitt in Form eines Winkels hat.
8. Vorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß sie Kompensationselemente (52, 60) aufweist.
9. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß die Kompensationselemente (52) unter dem elastischen Kissen (2) angeordnet sind.
10. Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, daß die Kompensationselemente (52) durch einen inkompressiblen Block gebildet sind.
11. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß die Kompensationselemente (60) zwischen dem Abstütz- und Halteelement (51) und dem elastischen Kissen (2) zwischengelegt sind.
12. Vorrichtung nach Anspruch 11, dadurch gekennzeichnet, daß die Kompensationselemente durch ein kleines Kissen (60) aus elastischen Material von gleicher Beschaffenheit wie dass Kissen (2) gebildet sind.
EP89403591A 1988-12-30 1989-12-20 Vorrichtung zum Tiefziehen von Blattmaterialien Expired - Lifetime EP0380894B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89403591T ATE75640T1 (de) 1988-12-30 1989-12-20 Vorrichtung zum tiefziehen von blattmaterialien.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8817525 1988-12-30
FR8817525A FR2641215A1 (fr) 1988-12-30 1988-12-30 Dispositif d'emboutissage de materiaux en feuilles

Publications (2)

Publication Number Publication Date
EP0380894A1 EP0380894A1 (de) 1990-08-08
EP0380894B1 true EP0380894B1 (de) 1992-05-06

Family

ID=9373659

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89403591A Expired - Lifetime EP0380894B1 (de) 1988-12-30 1989-12-20 Vorrichtung zum Tiefziehen von Blattmaterialien

Country Status (19)

Country Link
US (1) US5067336A (de)
EP (1) EP0380894B1 (de)
JP (1) JP2680905B2 (de)
CN (1) CN1018528B (de)
AR (1) AR247122A1 (de)
AT (1) ATE75640T1 (de)
AU (1) AU628456B2 (de)
BR (1) BR8906860A (de)
CA (1) CA2006774C (de)
CZ (1) CZ283164B6 (de)
DD (1) DD294439A5 (de)
DE (1) DE68901457D1 (de)
ES (1) ES2033118T3 (de)
FR (1) FR2641215A1 (de)
GR (1) GR3005288T3 (de)
HU (1) HU205286B (de)
RO (1) RO106971B1 (de)
RU (1) RU2037353C1 (de)
ZA (1) ZA899910B (de)

Families Citing this family (19)

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Publication number Priority date Publication date Assignee Title
FR2670408A1 (fr) * 1990-12-18 1992-06-19 Isoform Dispositif d'emboutissage de materiaux en feuille notamment de flans de tole.
FR2683168B1 (fr) * 1991-11-04 1994-03-04 Isoform Dispositif d'emboutissage de materiaux en feuille, notamment de flans de tole.
FR2715335B1 (fr) * 1994-01-21 1996-04-05 Lorraine Laminage Dispositif d'emboutissage d'un flan de tôle.
DE19939504A1 (de) * 1999-08-20 2001-03-08 Konrad Schnupp Verfahren zur Betätigung einer Umformpresse
DE20115945U1 (de) * 2001-09-27 2001-12-13 Heimbach Gmbh Thomas Josef Preßpolster
CN100448562C (zh) * 2005-11-23 2009-01-07 比亚迪股份有限公司 拉延工艺补充方法及拉延模具
AT504783B1 (de) * 2007-08-29 2008-08-15 Weba Werkzeugbau Betr S Gmbh Verfahren zum kaltverformen eines blechzuschnittes aus hochfestem stahl
CN101428323B (zh) * 2007-11-05 2011-04-13 南车青岛四方机车车辆股份有限公司 不锈钢车体顶板冲压成型工艺
US8337051B2 (en) * 2009-02-25 2012-12-25 Koninklijke Philips Electronics N.V. Reflector assembly and method of making same
ITMC20090202A1 (it) * 2009-09-22 2011-03-23 Wolfango Alpini Attrezzatura e metodo per lo stampaggio di materiale in foglio, in particolare lastre metalliche.
JP5557926B2 (ja) * 2010-11-16 2014-07-23 本田技研工業株式会社 プレス金型およびプレス加工方法
ES2689298T3 (es) * 2012-06-22 2018-11-13 Nippon Steel & Sumitomo Metal Corporation Método de fabricación y aparato de fabricación de carrocería moldeada a presión
CN102744319B (zh) * 2012-06-29 2015-03-25 袁志龙 一种冷冲压辅具及其冲压工艺
CN102861806A (zh) * 2012-10-31 2013-01-09 机械科学研究总院先进制造技术研究中心 一种电机支架的倾斜热冲压成形方法
TW201438883A (zh) * 2013-04-11 2014-10-16 Wistron Corp 整形裝置與機箱的整形方法
CN103846347B (zh) * 2014-03-15 2016-06-29 富士瑞鹄技研（芜湖）有限公司 一种用于板件成型的拉延模具
CN104289590B (zh) * 2014-09-05 2016-03-09 武汉理工大学 一种加工l形弯曲件的精冲弯曲复合成形工艺
RU189518U1 (ru) * 2018-10-17 2019-05-24 Анвар Юсуфович Боташев Импульсная машина для обработки давлением листового материала
CN114309330A (zh) * 2021-12-21 2022-04-12 杭州电力设备制造有限公司临安恒信成套电气制造分公司 一种金属抱箍批量化一体冲压成型设备

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US2422883A (en) * 1942-01-24 1947-06-24 Douglas Aircraft Co Inc Method and apparatus for flanging sheet metal
US2719500A (en) * 1950-07-28 1955-10-04 Northrop Aircraft Inc Flange forming press
US2783728A (en) * 1951-09-12 1957-03-05 Lake Erie Engineering Corp Apparatus for pressing sheet metal shapes
US3382690A (en) * 1965-09-17 1968-05-14 Kaufmann Tool & Engineering Co Draw die
US3533256A (en) * 1969-01-21 1970-10-13 Ustav Pro Vyzkum Motorovych Vo Hydraulic press and protective insert therefor
BE792036A (fr) * 1971-11-29 1973-05-29 Caterpillar Tractor Co Procede et appareil pour deformer de la matiere en feuille
SU799869A1 (ru) * 1978-02-03 1981-01-30 Предприятие П/Я В-8772 Комбинированный штамп дл вырубкиКОНТуРА ВыТ жКи и гибКи бОРТОВ
SU1183237A1 (ru) * 1983-06-27 1985-10-07 Московский авиационный технологический институт им.К.Э.Циолковского Штамп дл гибки
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

Also Published As

Publication number Publication date
DE68901457D1 (de) 1992-06-11
JPH03198924A (ja) 1991-08-30
GR3005288T3 (de) 1993-05-24
HUT54540A (en) 1991-03-28
CZ283164B6 (cs) 1998-01-14
AR247122A1 (es) 1994-11-30
RU2037353C1 (ru) 1995-06-19
HU896792D0 (en) 1990-03-28
CS751489A3 (en) 1992-01-15
FR2641215A1 (fr) 1990-07-06
CN1018528B (zh) 1992-10-07
DD294439A5 (de) 1991-10-02
EP0380894A1 (de) 1990-08-08
ES2033118T3 (es) 1993-03-01
BR8906860A (pt) 1990-09-25
ZA899910B (en) 1991-08-28
AU4730589A (en) 1990-07-05
CN1043893A (zh) 1990-07-18
CA2006774A1 (en) 1990-06-30
RO106971B1 (ro) 1993-08-30
HU205286B (en) 1992-04-28
JP2680905B2 (ja) 1997-11-19
CA2006774C (en) 1997-03-04
US5067336A (en) 1991-11-26
ATE75640T1 (de) 1992-05-15
AU628456B2 (en) 1992-09-17

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