Compound die assembly

Description

Background of the Invention

[0001] This invention relates to dies for shearing during stamping, and more particularly, to compound die assemblies for performing blanking and piercing at the same press stroke. Such a die assembly is described in patent specification DE-A-2505667.

[0002] Generally speaking, shearing in use of a compound die assembly is employed for large scale production of small-sized precision parts of metal such as steel, aluminium and other metals, paper or other materials, because it can readily produce a large number of parts with high dimensional accuracy without dimensional distribution. However, in order to ensure the high dimensional accuracy of parts produced, it is necessary to make dies to high dimensional accuracy. Therefore, the cost of the die is quite high so that the stamping using a compound die assembly is unsuitable for small scale production of parts of various shapes.

[0003] If the compound die assembly is used for making large-sized parts, weight and size of the die are necessarily increased and, therefore, cost is also increased. Furthermore, there are difficulties and dangers in installing the die assembly on a press. In particular, there is danger in fixing a punch unit to a press ram, and skill is required for die-height adjustment.

[0004] A die holder of compound die assembly is provided with slug clearance holes in order to remove punched slugs, and the compound die assembly is mounted on the press so that the slug clearance holes are disposed over openings of a bolster and a bed of the press. However, in shearing a large-sized blank having holes distributed therein, there is the disadvantage that punched slugs corresponding to holes at peripheral portions of the blank do not drop into the bolster opening so that the slugs cannot be removed. In order to overcome this disadvantage, it might be proposed to use parallel blocks beneath the die holder to form a space between the die holder and the press bolster in which punched slugs would be accumulated. However, the central portion of the die holder would be unsupported, and therefore, there would be the disadvantage that the die holder would be bent by the pressing force during blanking. Such a disadvantage would be increased in blanking parts having many holes close together, complicated holes and/or lengthy slits. In order to overcome this disadvantage, the thickness of the die element and the die holder must be increased, but this would result in an increase in thickness and weight of the die assembly. Accordingly the compound die assembly has been thought to be unsuitable for the production of large-sized blanks.

Summary of the Invention

[0005] It is an object of this invention to provide a compound die assembly which is simple, and which can be thick in construction, economical, suitable for the production of small numbers of parts, and/or suitable for the production of large-sized blanks. Embodiments of compound die assemblies according to this invention may also be suitable for the production of large-sized parts having holes close together, complicated holes and/or lengthy slits, and punched slugs may be readily removed from the assembly.

[0006] Further, in embodiments of compound die assemblies according to the invention the punch unit need not necessarily be fixed to the press ram so that mounting the die assembly onto the press is simple and die-height adjustment is not required.

[0007] The present invention provides in a compound die assembly including a punch unit having a punch holder, at least one punch element, a blanking die element, and a knockout plate; a die unit having a die holder, a blanking punch element corresponding to said blanking die element and having a die hole corresponding to said at least one punch element, and a stripper plate; and guide post means for maintaining operative vertical alignment of said punch unit and said die unit; the improvement which comprises providing said blanking die and punch elements respectively as outer and inner pieces formed from a single plate by wire-cut electro-discharge machining and fixed directly to said punch and die holders respectively and said knock-out and stripper plates respectively as inner and outer pieces formed from a single plate by wire-cut electro-discharge machining and elastically supported on said punch and die holders. respectively and further providing the top end portion of each guide post means fixed to said punch holder with the lower end portion thereof extending through a hole formed in said die holder, together with mount means adapted to be removably mounted on a press bolster and having a flat top surface on which said die unit and punch unit are supported and a set of holes for receiving the lower ends of said guide post means, clamping means being provided for fixing said die holder on to said mount means, said die holder having a plurality of load-supporting elements fixed near edges of slug clearance holes therein to form a slug accumulating space between said die holder and said mount means which communicates with the space surrounding said die holder.

[0008] The technique of wire-cut electro-discharge machining is described in Patent Specification DE-A-2357519.

[0009] In addition, springs may be contained in respective holes of the mount to thereby urge the guide posts upwardly together with the punch unit.

[0010] The following is a detailed description of preferred embodiments of this invention referring to the accompanying drawings.

Brief Description of the Drawings

[0011] 

Fig. 1 is a sectional view of a known compound die assembly;

Fig. 2 is a perspective view of a blank produced by use of the compound die assembly as shown in Fig. 1;

Fig. 3 is a plan view of an example of a large-sized precision blank;

Fig. 4 is a perspective view of a blank produced by an embodiment of this invention;

Fig. 5 is a plan view of a compound die assembly of an embodiment according to this invention for producing the blank of Fig. 4, with the punch unit omitted;

Fig. 6 is a sectional view of the embodiment taken along the line VI-VI in Fig. 5;

Fig. 7 is a sectional view of the embodiment taken along line VII-VII in Fig. 5;

Fig. 8 is a disassembled perspective view of the punch unit and the die unit of the embodiment of Figures 5 to 7;

Fig. 9 is a bottom view of the die holder of the embodiment of Figures 5 to 8, with load-supporting elements;

Fig. 10 is a perspective view of the mount of the embodiment of Figures 5 to 9: and

Fig. 11 is a view illustrating a process for making a punch element and a die element according to the invention by wire-cut electro-discharge machining.

Detailed Description of Preferred Embodiments

[0012] Prior to the description of embodiments of this invention, a known compound die assembly will be described referring to Fig. 1. The assembly shown includes a punch unit 1, a die unit 2, and a set of guide posts 3 for maintaining operative alignment of the punch unit and the die unit. Punch unit 1 is provided with a punch holder 11 which is formed with shank 12 for fixing the punch unit to a press ram (not shown). A backing plate 13 is secured onto the bottom surface of punch holder 11 by bolt means, and a punch plate 14 is also secured onto the bottom surface of backing plate 13 by bolt means. A piercing punch 15 is secured to punch plate 14 by being inserted into a hole of punch plate 14. Punch 15 is prevented from dropping down from punch plate 14 by engagement of its top collar with a shoulder of the hole of punch plate 14, and is also prevented from moving upwardly by engagement of its top surface with backing plate 13. A blanking die element 16 is supported from the bottom surface of punch plate 14 by bolt means with a spacer ring 17 therebetween. A knockout plate 18 is slidably fitted into the die hole of blanking die element 16, and punch 15 extends through knock- out plate 18. One or more elastic members 19 of, for example, polyurethane rubber are disposed between knockout plate 18 and punch plate 14 to urge knockout plate 18 downwardly. Knockout plate 18 is also prevented from dropping down by engagement of its top outer flange with the upper edge of the die hole of blanking die element 16.

[0013] Die unit 2 is provided with a die holder 21 to be mounted on a press bolster (not shown), on which a die plate 22 is fixed. A blanking punch element 23 which corresponds to blanking die element 16 is fixed to die plate 22 and has a die hole 23a corresponding to punch 15. A stripper plate 24 is slidably fitted onto blanking pumch element 23 and is elastically supported on die plate 22 through one or more elastic members 25 of, for example, polyurethane rubber.

[0014] Die holder 21 is provided with a slug clearance hole 21a corresponding to die hole 23a of blanking punch element 23.

[0015] Guide posts 3 are fixed to die holder 21 and stand vertically thereon. Punch holder 11 is provided with guide bushings 4 receiving top end portions of guide posts 3, and operative vertical alignment of punch unit 1 and die unit 2 is maintained by fitting guide posts 3 into guide bushings 4.

[0016] The compound die assembly is mounted on a press by fixing punch unit 1 to a press ram through shank 12 and by clamping die holder 21 onto a press bolster by clamping means (not shown). When the press is operated after a work piece is located on die unit 2, a blank is obtained which has an outer shape corresponding to the outer shape of blanking punch element 23 and a hole pierced by punch element 15. The blank obtained by use of the compound die assembly of Fig. 1 is shown in Fig. 2. In the figure, 5 is the blank and 6 is a hole formed in the blank.

[0017] Thus, the use of compound die assembly enables the performance of blanking and piercing simultaneously by one press stroke, and therefore enables the production of large numbers of blanks having holes without any variation in dimensions between the blanks. Accordingly, the compound die assembly can be employed for producing small-sized precision parts.

[0018] However, for producing large-sized blanks having many holes, for example, as shown in Fig. 3, the cost, volume and weight of the die assembly are necessarily increased. Moreover, removal of slugs is difficult and the blanking punch element and the die holder are subject to bending, as described above. Therefore, the prior art compound die assembly is unsuitable for the production of large sized parts, in particular, such as parts having one or more slits, complicated openings and/or crowded holes as shown at a, b and c in Fig. 3.

[0019] The present invention provides a compound die assembly which is suitable for the production of large-sized parts having many holes, complicated holes and/or slits.

[0020] An embodiment of this invention will be described below in connection with the production of blanks as shown in Fig. 4, for simplification of the drawings. The blank 7 in Fig. 4 has a square hole 7a and two small circular holes 7b and 7c.

[0021] Referring to Figs. 5-11, the embodiment shown is similar to the known compound die assembly in that it has a punch unit 10, die unit 20 and guide posts 30, but the construction of those units is quite different from that in the known assembly. The illustrated embodiment is provided with a mount 40 and a plurality of load-supporting elements 50.

[0022] Punch unit 10 includes a punch holder 101 and a blanking die element 103 which is directly fixed onto the bottom surface of punch holder 101 by bolt means 102. Blanking die element 103 has a die hole corresponding to the outer shape of the desired blank. Punch elements 104-106 are disposed in the die hole of blankingdie element 103. In this embodiment, punch 104 is for forming square hole 7a of the blank of Fig. 4, and will be referred to as an inner blanking punch element. Punches 105 and 106 are for piercing holes 7b and 7c of the blank in Fig. 4. Inner blanking punch element 104 is fixed to punch holder 101 by bolt means 107 and pins 108. Piercing punch elements 105 and 106 are secured to punch holder 101 by engagement of their top flange portions with shoulder portions of punch-receiving holes of punch holder 101, as best shown in Fig. 6. A knockout plate 109, which has an outer shape corresponding to the die hole of blanking die element 103 and holes corresponding to punches 104-105, is fitted in the die hole of blanking die element 103, and is supported from punch holder 101 by hanger bolts 110. One or more elastic members 111 of, for example, polyurethane rubber are disposed between knockout plate 109 and punch holder 101 so that knockout plate 109 can elastically sink into the die hole of blanking die element 103. Elastic members 111 are formed in a ring and are fixed to punch holder 101 by hanger bolts 110 and/or screws.

[0023] The die unit is provided with a die holder 201 and a die element 203 which is directly fixed onto die holder 201 by bolt means 202. Die element 203 has an outer shape corresponding to the die hole of blanking die element 103 and serves as a blanking punch element. Die element 203 is also provided with die holes 203a and 203b corresponding to punches 104-106. A stripper plate 204 having a hole corresponding to the die hole of blanking die element 103 is fitted onto die element 203, and is supported on die holder 201 by hanger bolts 205. Elastic members 206 of, for example, polyurethane rubber are disposed between stripper plate 204 and die holder 201 so that stripper plate 204 can elastically sink below the top surface of die element 203. Die holder 201 is formed with slug clearance holes 201a a and 201b corresponding to die holes 203a and 203b.

[0024] Guide posts 30 are fixed to punch holder 101 at their top end portions and extend downwardly through blanking die element 103. The lower end portions of guide posts 30 project downwardly from die holder 201 after extending through stripper plate 204 and die holder 201.

[0025] Mount 40 for supporting punch unit 10 and die unit 20 is provided with a set of holes 401 for receiving the lower end portions of guide posts 30 in the flat surface. Coil springs 402 are contained within the holes 401. Therefore, upon being inserted into holes 401, the lower end portions of guide posts 30 are pushed up by springs 402, so that punch unit 10 is elastically supported in a condition raised from die unit 20.

Die unit 20 is fixed onto mount 40 by fittings 403 and bolt means 404.

[0026] As best shown in Fig. 9, a plurality of load-supporting elements 50 are fixed near the opening edges of slug clearance holes 201a a and 201 b on the bottom surface of die holder 201. Therefore, a space is formed between the bottom surface of die holder 201 and mount 40. the space communicates with the surrounding space of the die holder and serves for accumulation of slugs.

[0027] Since load-supporting elements 50 are disposed not at the periphery of the die holder but near the slug clearance holes, bending of die element 203 and die holder 201 is advantageously prevented even if the holes to be pierced are slits, complicated, and/or crowded. Therefore, by utilising this arrangement of the compound die assembly, large-sized precision parts can be produced, and the die holder 201 and die element 203 can be relatively thin.

[0028] In the above-described compound die assembly, blanking die and punch elements 103 and 203 are made from a sheet of plate by W.C.E.D.M. (Wire-cut electro-discharge machining). Referring to Fig. 11, it is known in the art to produce a die or a punch by the W.C.E.D.M. or by moving a wire 70 along an outer contour of a desired blank with the establishment of an electric spark between a work plate 60 and wire of, for example, phosphor bronze 70. If wire 70 is inclined to form a tapered section, the separated inner and outer pieces 601 and 602 can be used as a punch and a die, respectively, so that punch and die sets can be produced by one cutting operation. In this connection, the wire-inclination angle θ must be selected depending on the thickness of the work plate 60 so as to make a suitable clearance I between tips of the punch 601 and die 602. Die 103 and punch 203 in the embodiment of Figs. 5-10 are made by this process. The resultant punch and die elements made according to this process fit more accurately together compared to those manufactured separately and the working time is reduced.

[0029] Further, one or more piercing die holes can also be formed in the resultant blanking punch element (601 in Fig. 11) by a similar W.C.E.D.M. process, and the separated pieces can be also used as punch elements. In Figs. 5-8, inner blanking punch element 104 is made by the process, but the other punch elements 105 and 106 are formed separately.

[0030] Knockout plate 109 and stripper plate 204 in the embodiment of Figs. 5-8 are also made by a similar W.C.E.D.M. process without wire 70.

[0031] In use of the above-described compound die assembly, mount 40 is disposed on a press bolster (not shown) and is firmly fixed thereto by any suitable clamping means. Die unit 20 is then fixed onto mount 40 by fittings and bolt means 403 and 404 after inserting coil springs 402 in holes 401 of mount 40. Thereafter, punch unit 10 is installed by inserting guide posts 30 into holes 401 of mount 40 thrugh guide-receiving holes of stripper plate 204 and die holder 201. Thus, installation of the compound die assembly onto the press is completed. In this condition, when a work plate is put on die unit 20 and the press is operated, the press ram moves downwardly to push down punch unit 10 against coil springs 402. Thus, a blank as shown in Fig. 4 is punched out. When the press ram moves upwardly, punch unit 10 is pushed up by coil springs 402. Therefore, the punched out blank can be picked up and the assembly is restored to its initial condition. Production of blanks is subsequently performed in a similar manner. Slugs are accumulated on mount 40, but they can be removed through gaps between load-supporting elements 50 at desired times.

[0032] As described above, the punch unit 10 is raised by coil springs 402 to form a space between punch unit 10 and die unit 20 in which the work plate is disposed, so that punch unit 10 does not need to be fixed to the press ram. Therefore, installing the die assembly onto the press is quite simple, and no die-height adjustment is required.

[0033] Punch elements 104 and 106 are prevented from upwardly slipping out of punch holder 101 by engagement of their top surfaces with the bottom surface of the press ram. However, if there are openings and/or depressions in the press ram surface, a flat plate may be disposed on the top surface of punch holder 101. Punch unit 10 may be fixed to the press ram if desired, and in that case coil springs 402 are not necessary.

[0034] As best shown in Fig. 10, mount 40 may be provided with a plurality of guide-post-receiving holes 401 for each guide post, so that mount 40 can be used for different punch and die units. For use with a different punch and die, coil springs 402 are moved to new guide-post-receiving holes. Furthermore, mount 40 may be formed by three blocks 40a, 40b and 40c as shown in Fig. 9, with guide-post-receiving holes formed in two blocks 40a and 40b on opposite sides, with the central block 40c being replaceable by different blocks. In this arrangement, the mount can be used for supporting various punch and die units.

[0035] In Fig. 10, 405 represents screw holes for receiving bolts 404 for fixing die unit 20.

[0036] As known in the prior art, the blanking die element, punch elements, die or blanking punch element, knockout plate and stripper plate are made of alloy tool steel.

[0037] The load-supporting elements need not be disks but could be blocks in the shapes of cubes, rectangles, for example. The load-supporting element is also made of alloy tool steel.

[0038] An embodiment of the invention has been described in detail in connection with the production of blanks of comparatively simple shape as shown in Fig. 4, but the skilled person will appreciate that the illustrated assembly can be adapted to produce more complicated blanks, for example as shown in Figure 3.

Claims

1. In a compound die assembly including a punch unit (10) having a punch holder (101), at least one punch element (104-106), a blanking die element (103), and a knockout plate (109); a die unit (20) having a die holder (201), a blanking punch element (203) corresponding to said blanking die element and having a die hole (203a, 203b) corresponding to said at least one punch element, and a stripper plate (204); and guide post means (30) for maintaining operative vertical alignment of said punch unit and said die unit; the improvement which comprises providing said blanking die and punch elements respectively as outer and inner pieces formed from a single plate by wire-cut electro-discharge machining and fixed directly to said punch and die holders respectively and said knock-out and stripper plates respectively as inner and outer pieces formed from a single plate by wire-cut electro-discharge machining and elastically supported on said punch and die holders respectively and further providing the top end portion of each guide post means fixed to said punch holder with the lower end portion thereof extending through a hole formed in said die holder, together with mount means (40) adapted to be removably mounted on a press bolster and having a flat top surface on which said die unit and punch unit are supported and a set of holes (401) for receiving the lower ends of said guide post means, clamping means (402, 403) being provided for fixing said die holder on to said mount means, said die holder having a plurality of load-supporting elements (50) fixed near edges of slug clearance holes (201 a, 201b) therein to form a slug accumulating space between said die holder and said mount means which communicates with the space surrounding said die holder.

2. A compound die assembly as claimed in Claim 1, which further comprises spring means (402) contained in respective holes (401) of said mount means to thereby urge said guide post means upwardly together with said punch unit.

3. A compound die assembly as claimed in claim 1 or Claim 2, wherein said mount means is provided with a plurality of sets of said guide-post receiving holes (401) adapted to selectively support different die sets.

4. A compound die assembly as claimed in Claim 3, wherein said mount means comprises first and second block portions (40a, 40b) to be fixed onto the press bolster, and a third block portion (40c) which is supportable on and between said first and second block portions, whereby said mount means may be adapted to support a different size of said die assembly by replacing said third block portion by a third block portion of a different size.

5. A compound die assembly as claimed in any preceding claim, wherein said knockout plate is supported from said punch holder by hanger-bolt means (110), and at least one elastic member (111) is disposed between said punch holder and said knockout plate to urge said knockout plate downwardly.

6. A compound die assembly as claimed in Claim 1, wherein said stripper plate is supported on said die holder by hanger-bolt means (205), at least one elastic member (206) disposed between said stripper plate and said die holder to urge said stripper plate upwardly.

7. A compound die assembly as claimed in Claim 5 or 6, wherein said elastic member is made of polyurethane rubber.

Revendications

1. Dans un outillage composé de matrice comprenant une unité d'emboutissage (10) avec un porte-poinçons (101), au moins un élément de poinçon (104-106), un élément de matrice de découpage (103) et une plaque d'éjecteur (109); une unité de matrice (20) comprenant un porte- matrice (201), une élément de poinçon de découpage (203) correspondant audit élément de matrice de découpage et ayant un trou de matrice (203a, 203b) correspondant audit élément de poinçon au moins, et une plaque d'éjecteur (204); et des moyens d'axe de guidage (30) pour maintenir l'alignement vertical fonctionnel entre ladite unité d'emboutissage et ladite unité de matrice; le perfectionnement qui consiste à prévoir lesdits éléments de matrice et de poinçon de découpage respectivement sous la forme de pièces extérieures et intérieures formées à partir d'une seule plaque par usinage par électro-érosion de découpage à fil, et fixés directement sur lesdits porte-poinçons et porte-matrices respectivement, et lesdites plaques d'éjecteur et de dévêtisseur respectivement sous la forme de pièces intérieures et extérieures formées à partir d'une seule plaque par usinage par électro-érosion de découpage à fil et supportés de façon élastique sur lesdits porte-poinçons et porte-matrices respectivement et en prévoyant encore la portion d'extrémité supérieure de chaque axe de guidage fixée audit porte-poinçons, avec l'extrémité inférieure de ces axes traversant un trou formé dans ledit porte-matrices, en même temps que des moyens de monture (40) adaptés à être installés de façon amovible sur un plateau de presse et ayant une surface supérieure plane sur laquelle ladite unité de matrice et ladite unité d'emboutissage sont supportées et un jeu de trous (401) pour recevoir les extrémités inférieures desdits moyens de guidage, des moyens de serrage (402, 403) étant prévus pour fixer ledit porte-matrices sur lesdits moyens de monture, ledit porte-matrice ayant une pluralité d'éléments supports de charge (50) fixés à proximité des bords de trous de dégagement des chutes (201a, 201 b) afin de ménager un espace d'accumulation des chutes entre ledit porte-matrices et lesdits moyens de monture qui communique avec l'espace entourant ledit porte-matrices.

2. Outillage composé de matrice selon la revendication 1, qui comprend encore des moyens à ressorts (402) placés dans les trous respectifs (401) desdits moyens de monture afin de pousser ainsi lesdits moyens d'axe de guidage vers le haut en même temps que ladite unité d'emboutissage.

3. Outillage composé de matrice selon l'une des revendications 1 ou 2 dans lequel lesdits moyens de monture présentent une pluralité de jeux desdits trous de réception des axes de guidage (401) adaptés à supporter de façon sélective différentes jeux de matrices.

4. Outillage composé de matrice selon la revendication 3, dans lequel lesdits moyens de monture comprennent une première et une seconde portions de bloc (40a, 40b) à fixer sur le plateau de la presse, et une troisième portion de bloc (40c) qui peut être supportée sur et entre lesdites première et seconde portions de bloc, de façon que lesdits moyens de monture puissent être adaptés à supporter une dimension différente dudit ensemble de matrices en remplaçant ladite troisième portion de bloc par une troisième portion de bloc de dimension différente.

5. Outillage composé de matrice selon l'une quelconque des revendications précédentes, dans lequel ladite plaque d'éjecteur est supportée à partir dudit porte-poinçons par des moyens de boulons de suspension (110), et au moins un élément élastique (111) est placé entre ledit porte-poinçons et ladite plaque d'éjecteur pour pousser ladite plaque d'éjecteur vers le bas.

6. Outillage composé de matrice selon la revendication 1, dans laquelle ladite plaque d'éjecteur est supportée sur ledit porte-matrices par des moyens à boulons de suspension (205) un élément élastique au moins (206) étant disposé entre ladite plaque d'éjecteur et ledit porte-matrices pour pousser ladite plaque d'éjecteur vers le haut.

7. Outillage composé de matrice selon l'une des revendications 5 ou y dans lequel ledit élément élastique est en caoutchouc de polyuréthane.

Ansprüche

1. Mehrfach-Werkzeug, mit einem Stempelsatz (10), der einen Stempelhalter (101), wenigstens ein Stempelelement (104-106), ein Schnittmatrizenelement (103) und eine Auswerferplatte (109) umfaßt, mit einem Matrizensatz (20), der einen Matrizenhalter (201), ein mit dem Schnittmatrizenelement übereinstimmendes Schnittstempelelement (203), das ein mit dem Stempelelement übereinstimmenden Matrizenloch (203a, 203b) aufweist, und eine Abstreiferplatte (204) umfaßt, und mit Führungssäulen (30) zur Beibehaltung einer arbeitsmäßig vertikalen Ausrichtung des Stempelsatzes und des Matrizensatzes, dadurch gekennzeichnet, daß die Schnittmatrizen- und Schnittstempelelemente als äußere und innere Werkzeugteile aus einer einzigen Platte mit einer Ekektroerosions-Drahtschneidemaschine herausgeschnitten und direkt an den Stempel- und Matrizenhaltern befestigt sind, daß die Auswerfer- und Abstreiferplatten als innere und äußere Werkzeugteile aus einer einzigen Platte mit einer Elektroerosions-Drahtschneidemaschine herausgeschnitten und an den Stempel- und Matrizenhaltern elastisch abgestützt sind, und daß das obere Ende jeder Führungssäule an dem Stempelhalter befestigt und ihr unterer Endbereich durch ein in dem Matrizenhalter vorgesehenes Loch hindurchgeführt ist für eine Vereinigung mit einem Haltemittel (40), das zur auswechselbaren Befestigung am Matrizeneinsatz einer Presse ausgebildet ist und eine flache Oberseite aufweist, an welcher der Matrizensatz und der Stempelsatz abgestützt sind, sowie eine Anzahl von Löchern (401) hat, welche die unteren Enden der Führungssäulen aufnehmen, wobei zum Befestigen des Matrizenhalters an dem Haltemittel Klemm-Mittel (402, 403) vorgesehen sind und der Matrizenhalter eine Anzahl von lastabstützenden Elementen (50) aufweist, die nahe den Rändern von Abfall-Abführlöchern (201 a, 201 b) befestigt sind und die einen Sammelraum für Abfälle zwischen dem Matrizenhalter und dem Haltemittel schaffen, der mit dem den Matritzenhalter umgebenden Raum in Verbindung steht.

2. Mehrfach-Werkzeug nach Anspruch 1, dadurch gekennzeichnet, daß in den Löchern (401) des Haltemittels Federn (402) aufgenommen sind, um die Führungssäulen zusammen mit dem Stempelsatz nach oben zu drücken.

3. Mehrfach-Werkzeug nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Haltemittel mit einer Vielzahl von Sätzen der Führungssäulen aufnehmenden Löcher (401) versehen ist, um wahlweise verschiedene Matrizensätze abzustützen.

4. Mehrfach-Werkzeug nach Anspruch 3, dadurch gekennzeichnet, daß das Haltemittel erste und zweite Blockteile (40a, 40b) umfaßt, die zur Befestigung an dem Matrizeneinsatz einer Presse vorgesehen sind, sowie einen dritten Blockteil (40c), der an und zwischen den ersten und zweiten Blockteilen abstützbar ist, wodurch das Haltemittel für eine Abstützung einer unterschiedlichen Größe des Mehrfach-Werkzeuges ausgebildet ist, wenn dafür der dritte Blockteil durch einen dritten Blockteil einer unterschiedlichen Größe ausgetauscht wird.

5. Mehrfach-Werkzeug nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Auswerferplatte an dem Stempelhalter mittels Hängerbolzen (110) aufgehängt und daß wenigstens ein Elastikkörper (111) zwischen dem Stempelhalter und der Auswerferplatte angeordnet ist, um die Auswerferplatte nach unten zu drücken.

6. Mehrfach-Werkzeug nach Anspruch 1, dadurch gekennzeichnet, daß die Abstreiferplatte an dem Matrizenhalter mittels Hängerbolzen aufgehängt und daß wenigstens ein Elastikkörper (206) zwischen der Abstreiferplatte und dem Matrizenhalter angeordnet ist, um die Abstreiferplatte nach oben zu drücken.

7. Werkfach-Werkzeug nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß der Elastikkörper aus Polyurethan-Gummi besteht.

Drawing