EP0317412B1 - Zusammengesetztes Ziehwerkzeug für eine Ziehpresse - Google Patents

Zusammengesetztes Ziehwerkzeug für eine Ziehpresse Download PDF

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Publication number
EP0317412B1
EP0317412B1 EP19880402846 EP88402846A EP0317412B1 EP 0317412 B1 EP0317412 B1 EP 0317412B1 EP 19880402846 EP19880402846 EP 19880402846 EP 88402846 A EP88402846 A EP 88402846A EP 0317412 B1 EP0317412 B1 EP 0317412B1
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EP
European Patent Office
Prior art keywords
tank
metal
working
press
die
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
EP19880402846
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English (en)
French (fr)
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EP0317412A1 (de
Inventor
Gilbert Gorin
Gérard Monza
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CHAUSSON INGENIERIE
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CHAUSSON INGENIERIE
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Publication date
Application filed by CHAUSSON INGENIERIE filed Critical CHAUSSON INGENIERIE
Publication of EP0317412A1 publication Critical patent/EP0317412A1/de
Application granted granted Critical
Publication of EP0317412B1 publication Critical patent/EP0317412B1/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
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/20—Making tools by operations not covered by a single other subclass

Definitions

  • a stamping press includes a set of tools, the simplest of which consists of a die, a blank holder and a punch.
  • the blank holder serves to keep the peripheral edge of the blank pressed against the peripheral edge of the die when the press is closed, then the punch is then moved relative to the die to deform the blank and give it the required shape by cooperating for that with the matrix.
  • the parts of the stamping tool set also include numerous accessories such as ejectors, bezers, vents, etc. removably mounted.
  • a reference model is used for each part, which is established from a standard model.
  • the reference model is used for the execution of a reproducing model which is used for the machining by copying of a raw piece of foundry produced by casting in a sand mold.
  • Machining includes several roughing passes, generally three, followed by at least one finishing pass.
  • the set of tools for the production of stamped parts constitutes a very high weight unit given the dimensions which certain parts have such as mud flaps, doors, vehicle roofs, etc.
  • the tools must be rectified by a highly competent specialist because it always turns out that there are defects due to machining on large parts which are not centered. identically in the same way on the machining bench and on the press.
  • the present invention creates a new set of composite tools which makes it possible to considerably reduce the manufacturing time and which greatly improves the precision of all the constituent parts of the set of tools while reducing or even eliminating any machining of the working parts of the set of tools.
  • Document FR-A-2 221 201 discloses a set of composite tools for a stamping press comprising plates to cause the relative displacement of a punch relative to a die as well as a blank holder holding a blank against the edge of the die during the relative movement of the punch and the die, the die comprising a working part of metal which cooperates with a working part of the punch also in metal and with a working part of the blank holder also in metal, l at least one of the working parts being supported by a body connected to a sole carried by the press, the matrix and the blank holder being fixed respectively to the lower sole and to the upper sole of the press.
  • the set of tools is characterized in that the body is made of concrete constituted by a synthetic resin loaded with mineral matter and is contained in a metal tank or box connected to one of the soles of the press, the composite matrix and the composite blank holder being fixed respectively to the lower sole and to the upper sole of the press by cleats rigidly connected to the tank or box, itself anchored to the concrete by sealing lugs, the working parts metal of the matrix and the blank holder being rigid parts supported by shims interposed between said metal working parts and concrete and by tubular spacers containing screws connecting the metal working parts to their respective flange.
  • the invention also extends to a method for the production of a set of composite tools and, in this regard, document FR-A-2 221 201 above shows a process for the manufacture of a tool element, die, punch or blank holder a set of composite tools for a piece stamping press, in which a tank or box is placed on and around a metal working part, concrete is poured into the tank or box and on the working part , said concrete constituting the body of the tool and said working part and said body of the tool are assembled to said tank or box.
  • the method is characterized in that a concrete consisting of a synthetic resin loaded with mineral material is used, the working part is placed on a model or model or directly on a corresponding working part of the set of tools, said metal working part being a rigid part, before pouring the concrete, place shims on and around the free surfaces of the working part, a layer of covering resin is poured, l assembly of the body of the tool and the working part to the tank or box being produced by means of screws passed through tabs of said tank or box and in tubular spacers, said screws respectively connecting the body of the tool and the working parts at the soles of the press.
  • Fig. 1 is a schematic sectional elevation of a set of composite tools according to the invention, for a stamping press.
  • Fig. 2 is a schematic sectional elevation illustrating an embodiment of part of the set of tools of FIG. 1.
  • Fig. 3 is a sectional elevation similar to FIG. 2, illustrating the production of another part of the set of tools in FIG. 1.
  • Fig. 4 is a diagram illustrating a particular phase of production of working tool parts.
  • the sole 1 is connected to a matrix designated as a whole by 5. Furthermore, the sole 3 is connected to a blank holder 6 and is crossed by actuating members 7 of a punch designated as a whole by the reference 8, said actuating members 7 being connected to a slide of the press.
  • the blank holder 6 is intended to hold a part 9 on the periphery of the working part of the die 5 when the punch 8 is moved by the actuating members 7 to put shaped said part 9 by pressing it against the die 5.
  • the matrix comprises a tank 10 made of sheet metal, the internal walls of which include sealing tabs 11 to ensure perfect connection between said tank 10 and a concrete 12 constituting the body of the matrix.
  • the concrete 12 is, for example, constituted by a synthetic resin loaded with mineral matter.
  • irons 13 can be placed in the tank 10.
  • passages 14 are cleaned in the body 12 by means of tubes or other suitable elements, said passages 14 being intended for example to contain the body of ejector cylinders of the part 9.
  • the interior of the tank 10 can also be partitioned to reinforce some of its parts.
  • the concrete body 12 also contains spacers 15, for example tubular, which are interposed between the sole 1 and the working part 16 of the matrix.
  • the tank 10 is, moreover, provided in its lateral walls, with tubes 17 allowing the engagement of handling fingers and tabs 18 for fixing the matrix to the sole 1 by means of screws 19 or other suitable members.
  • FIG. 2 shows a model 20 of a shape complementary to that of the working part 16 of the matrix.
  • the model 20 is surrounded at its periphery by a formwork 21, for example made of wood.
  • the formwork 21 is provided, on its top, with covering elements 22, for example made of synthetic resin foam, and, likewise, covering elements 23 are arranged at the periphery of the working part 16.
  • the tank 10 is placed on the covering elements 22 as well as the spacer tubes 15, the passage pipes 14 and other accessories which the matrix must include, for example concrete irons 13.
  • the concrete 12 which must form the body is then poured up near the upper part 10 of the tank.
  • Liquid resin intended to form a covering layer 24, called gelcoat is finally cast, then the sole 1 is put in place and tightened on the tank 10 by means of the screws 19 and possibly of the screws 19a which can be passed through the tubes. - spacers 15 to be screwed into some of the working parts 16.
  • the cover layer 24 is placed in liquid form and in excess, vents 25 being provided to remove the excess resin. It is thus ensured that the sole 1 is in close contact with the concrete body 12 and that the latter is itself in close contact with the working part 16 of the matrix.
  • the prepared part is then turned over, the covering elements 22 and 23 being removed.
  • the space left free by the covering elements 23 is finally filled with liquid resin which is polymerized to ensure a perfect connection between the working part 16 and the body 12 of concrete.
  • the punch 8 is manufactured in a similar manner to what has just been described, that is to say that its working part 26 is placed on a model or model 27 and is then connected to a box 28 provided with cleats 18a for the passage of screws such as 29, connecting it to the working part 26.
  • the box 28 is filled with a concrete body 12a.
  • the box 28 is used, like the tank 10 of the matrix, for fixing various accessories, in particular guide plates 30 which are intended to cooperate with guide plates 31 of the blank holder.
  • the punch 8 When the punch 8 is completed as described above, it is put in place in the die 5 after dressing thereof by a reference piece 9 or by providing it with brass shims of thickness corresponding to the piece 9.
  • the working edges 34 can indifferently be put in place after or before the tank 33.
  • spacers 35 are preferably tubular between the part working and the level corresponding to the upper part of the tank 33.
  • a removable sheath 36 is placed on top of the punch to which the guide plate (s) 31 are also attached, which must cooperate with the guide plate (s) 30 of the punch.
  • concrete forming a body 12b is poured into the tank 33 near the upper part thereof, liquid resin is then poured and then the sole 3 is it -same establishment and pressed on the liquid resin and on the concrete body 12b by screws 19a and possibly other screws passed through the tubular spacers 35.
  • the pressing of the sole 3 is preferably carried out while the latter went up on the press.
  • the sheath 36 can be removed if desired.
  • the embodiment described above means that the parts which are produced from one another provide automatic adjustment with respect to the press which carries them, which then avoids any resumption of machining.
  • each tool part can be made in one or more pieces. It is also possible that some parts have recesses as shown in 37 and 38 with respect to the punch and the die respectively.
  • Some of the working parts can also be reinforced by blades made of particularly hard metals when some of said working parts have to withstand particular wear or pressure stresses.
  • the model 41 is covered by a deformable thermoplastic sheet 42, for example made of polyethylene, which is formed under vacuum to exactly match the model 41.
  • a layer of a refractory material 43 for example zirconium, is then sprayed onto the sheet 42, then the assembly is put in place in a box 44 into which mold sand is vibrated and to which a vacuum is applied pushed by pipes such as 45.
  • Cast iron or another metal suitable for making the parts working of the above tools is then poured through one or more conduits 46, which destroys the model and produces the desired part of the tool at the exact dimensions of said model.
  • the model does not have an undercut, it is removed beforehand.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Food-Manufacturing Devices (AREA)

Claims (10)

  1. Zusammengesetztes Ziehwerkzeug für eine Tiefziehpresse, bestehend
    - aus Platten (2,4) zur relativen Verschiebung des Stempels (8) gegenüber der Matrize (5),
    - aus einem Niederhalter (6), zur Fixierung des scheibenförmigen Werkstückes gegen den Rand der Matrize (5) während der relativen Verschiebung des Stempels (8) gegenüber der Matrize (5),
    - aus einem metallischen Arbeitsteil (16) der Matrize (5),
    - aus einem Arbeitsteil (26) des Stempels (8), das ebenfalls aus Metall besteht, und
    - aus einem Arbeitsteil (34) des Niederhalters (6), ebenfalls aus Metall,
    - wobei mindestens eines der Arbeitsteile (16, 26, 34) von einem Körper (12,12a,12b) getragen wird, der mit je einer Tragplatte (1,3) verbunden ist, die an der Presse gehalten ist, und
    - dabei die Matrize (5) der unteren Tragplatte (1) und der Niederhalter (6) der oberen Tragplatte (3) der Presse zugeordnet ist,
       dadurch gekennzeichnet,
       daß die Körper (12,12a,12b) aus einem Beton bestehen,
    - der sich zusammensetzt aus einem synthetischen Harz und einem mineralischen Füllstoff, und
    - der sich in einem metallischen Behälter, dem Kasten (10,28,33), befindet, und
    - der seinerseits mit einer der Tragplatten (1,3) der Presse verbunden ist,
       daß die Baugruppe der Matrize (5) und die Baugruppe des Niederhalters (6) an der unteren Tragplatte (1) bzw. an der oberen Tragplatte (3) der Presse mittels Platten (18) befestigt sind, die starr mit dem Behälter, dem Kasten (10,28,33), durch im Beton eingegossene Füße (11) verankert sind,
       daß die metallischen Arbeitsteile (26,34) der Matrize (5) und des Niederhalters (6) starre Teile sind, die mit Hilfe von Trennplatten (39, 40), die zwischen den metallischen Arbeitsteilen (16,26,34) und dem Beton eingelegt sind, geführt werden und
       daß die metallischen Arbeitsteile (16,26,34) mit Hilfe von Schrauben, die Rohre (15,35) durchgreifen, mit ihrer entsprechenden Tragplatte (1,3) verbunden sind.
  2. Zusammengesetztes Ziehwerkzeug nach Anspruch 1, dadurch gekennzeichnet,
       daß die Körper (12a,12b) des Stempels (8) und des Niederhalters mit zuzsätzlichen Führungsplatten (30,31) ausgestattet sind.
  3. Zusammengesetztes Ziehwerkzeug nach den Ansprüchen 1 oder 2, dadurch gekennzeichnet,
    daß die Kästen (10,28,33) der Matrize (5), des Niederhalters (6) und des Stempels (8) mit Rohren (17,17a), Vorsprüngen (18,18a) und dergleichen versehen sind, die wenigstens teilweise in den Körper (12,12a,12b) eingefügt sind.
  4. Verfahren zur Herstellung eines Werkzeugelementes, einer Matrize, eines Stempels oder eines Niederhalters eines zusammengesetzten Ziehwerkzeuges für eine Tiefziehpresse, wobei man
    - über ein Arbeitsteil (16,26,34) aus Metall einen Behälter oder Kasten (10,28,33) setzt,
    - Beton in den Behälter oder Kasten (10,28,33) und auf das Arbeitsteil (16,26,34) vergießt, und
    - der ausgehärtete Beton den Werkzeugkörper bildet, der das Arbeitsteil (16,26,34) mit dem Behälter oder Kasten (10,28,33) verbindet,
       gekennzeichnet dadurch,
       daß man einen Beton verwendet, der aus einem synthetischen Harz besteht, der mit einem mineralischen Füllstoff aufgefüllt ist,
       daß man das Arbeitsteil (16,26,34) auf ein Modell oder direkt auf eines der Arbeitsteile (16,26,34) des entsprechenden Werkzeugsatzes legt, wobei das Metallarbeitsteil (16,26,34) ein starres Teil ist,
       daß man vor dem Gießen des Betons Distanzscheiben (39,40) auf und um die freien Flächen des Arbeitsteiles (16,26,34) setzt,
       daß man dann eine Harzdeckschicht (24) gießt, nachdem die Verbindung des Werkzeugkörpers und des Arbeitsteiles (16,26,34) mit dem Behälter oder Kasten (10,28,33) mittels Schrauben, die die Platten (18,18a) des Behälters oder Kastens (10,28,33) und die Rohre (15,35) durchgreifen, hergestellt ist und
       daß dabei der Werkzeugkörper und die Arbeitsteile (16,26,34) mit den Tragplatten (1,3) der Presse verbunden werden.
  5. Verfahren nach Anspruch 4, dadurch gekennzeichnet,
    daß das Harz nach dem Einbau der Tragplatten (1,3), im flüssigen Zustand auf den Beton gegossen wird und das überschüssige Harz durch die Ablauföffnungen (25) in den Tragplatten (1,3) abgeführt wird.
  6. Verfahren nach einem der Ansprüche 4 oder 5,
    dadurch gekennzeichnet,
    daß die Arbeitsteile (16,26,34) aus gegossenem Metall hergestellt sind.
  7. Verfahren nach einem der Ansprüche 4 bis 6,
    daurch gekennzeichnet,
    daß die Arbeitsteile (16,26,34) in einer Gießform nach einem Modell gegossen werden, dessen Abmessungen das Schrumpfungsmaß des für den Guß verwendeten Metalls berücksichtigen.
  8. Verfahren nach einem der Ansprüche 4 bis 7, dadurch gekennzeichnet, daß das Gießen der Arbeitsteile (16,26,34) im Vakuum erfolgt.
  9. Verfahren nach einem der Ansprüche 4 bis 8, dadurch gekennzeichnet,
    daß wenigstens eine Tragplatte (3) dann mit der Presse verbunden wird und wenn die andere Auflageplatte (1) schon an der Presse befestigt ist.
  10. Verfahren nach einem der Ansprüche 4 bis 9,
    dadurch gekennzeichnet,
       daß man Verkleidungselemente (22) auf den Verschraubungsteilen (21) vor dem Gießen des Betons in dem Behälter (10) anordnet, und
       daß das Gießen des Betons von der Seite des Behälters (10) erfolgt, die der Tragplatte (1 bzw. 3) zugewandt ist.
EP19880402846 1987-11-13 1988-11-14 Zusammengesetztes Ziehwerkzeug für eine Ziehpresse Expired - Lifetime EP0317412B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8715710 1987-11-13
FR8715710A FR2623111B1 (fr) 1987-11-13 1987-11-13 Jeu d'outils composites pour presse d'emboutissage

Publications (2)

Publication Number Publication Date
EP0317412A1 EP0317412A1 (de) 1989-05-24
EP0317412B1 true EP0317412B1 (de) 1994-05-18

Family

ID=9356760

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880402846 Expired - Lifetime EP0317412B1 (de) 1987-11-13 1988-11-14 Zusammengesetztes Ziehwerkzeug für eine Ziehpresse

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Country Link
EP (1) EP0317412B1 (de)
DE (1) DE3889630T2 (de)
ES (1) ES2054850T3 (de)
FR (1) FR2623111B1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4976400A (en) * 1989-06-16 1990-12-11 General Motors Corporation Plastic tooling with compression adjustment
CN116394002B (zh) * 2023-02-23 2023-09-15 深圳市永义模具有限公司 一种成型后自动抛光的组合模具

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1935916A (en) * 1928-06-06 1933-11-21 Budd Edward G Mfg Co Metal die and method of making the same
US3239590A (en) * 1962-01-29 1966-03-08 Budd Co Method of making composite structure of plastic, especially forming die
FR2221201A1 (en) * 1973-03-15 1974-10-11 Arnaud Stamps dies and matrixes for presses - compositely constructed of metallic working faces on thermal-setting plastic
FR2314803A1 (fr) * 1975-06-20 1977-01-14 Matra Engins Perfectionnements aux procedes pour l'etablissement de surfaces telles, notamment, que les surfaces de travail d'outils, par exemple d'emboutissage
JPS58151925A (ja) * 1982-03-03 1983-09-09 Nissan Motor Co Ltd 簡易プレス型
US4601867A (en) * 1984-07-03 1986-07-22 General Motors Corporation Method of making cast-to-size epoxy tools for stamping sheet metal panels

Also Published As

Publication number Publication date
ES2054850T3 (es) 1994-08-16
DE3889630D1 (de) 1994-06-23
FR2623111A1 (fr) 1989-05-19
FR2623111B1 (fr) 1994-05-27
EP0317412A1 (de) 1989-05-24
DE3889630T2 (de) 1994-12-01

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