EP1935527B1 - Method and system for manufacturing moulded parts of a geometric shape made of sheet or strip material - Google Patents

Abstract

Method for producing deformed sheet metal parts comprises stacking plates in a stacking plate passage of a cutting plate over each other forming an easily wedged stacked block (30) of plates, joining a cut-out plate on the bur side of the lower plate of the block, loosening the upper plate from the block and removing from the block. An independent claim is also included for a system for carrying out the above method.

Description

The invention relates to a method for producing formed parts of sheet metal geometrically arbitrary shape of strip or strip material in a press with two separately driven plungers, in the first boards from the strip or strip material held by a press table, driven by the first plunger cutting tool are cut out in the direction of the cutting plate (die) upwardly moving cutting punch and are passed after opening the cutting tool by a slide from the tool room to a gripper device, which spans the boards in a transfer position and from there by a gripper transfer to a driven by the second plunger of the press Transfer tool for forming in their final geometry synchronously.

The invention further relates to a system for producing formed parts from sheet metal geometrically arbitrary shape of strip or strip material, comprising a two separately driven ram press comprising at least one driven by the first ram of the press cutting tool for cutting out of blanks, the lower part of the tool substantially a guide plate and a punch contains, and the tool upper part consists essentially of cutting plate, tuning plate and slide, a gripper device for transporting the boards in a transfer station for a gripping transfer, which supplies the boards to a driven by the second ram of the press transfer tool for further processing.

State of the art

From the DE 24 12 260 A1 a device for cutting and positioning of boards in presses is known, which is equipped with a cutting device with up-cutting cutting punch and at the same time driven means for receiving and transferring the boards to a transport system of the press. This solution includes presses with several successive stages of production. The cutting device consists essentially of a stationary die with a recess in the form and dimensions of the cut-to-size cutout and an up and down moving cutting punch that cuts on the upstroke. The cutting device is arranged in a position rotated by an angle relative to the production direction. The means for Card receiving and transfer to a transport system comprise a station for rotation of the boards from the given by the arrangement of the cutting angle angular position in the production direction. A clock-like, but in opposite directions with the cutting punch up and down moving sinker is rotatably formed. The cut-out boards lie obliquely to the longitudinal axis of the strip or strip material, so that the entire width of the material can be utilized.

Follow-on tooling solutions achieve low material waste by designing a layout in which the stamped shapes are oriented on the metallic strip in a mating position so that the cut shapes are nested ( DE 42 32 211 A1 ). In all these solutions, depending on the geometry of the parts, so-called free cuts are required for the forming operation and, in addition, corresponding attachment points are required for transporting the part with the material strip through the tool. Free cuts and attachment sites mean material loss.
A material consumption-optimized strip layout can result in the follow-on composite tool falling apart of the strip and therefore may not be applicable, or increases the susceptibility.

Other known solutions (see DE 27 43 981 A1 . EP 1 197 275 A1 . EP 1 316 373 A1 ) realize between the parts a common cutting line, so that virtually no scrap scrap is generated. This advantage can usually be used only for very specific part geometries.

task

In this prior art, the present invention seeks to improve a method and a system for producing sheet metal parts of any geometric shape, in particular circuit boards, of strip or strip material such that material consumption-optimized parts of high precision with a relatively large Ausbringleistung with simply constructed Tool can be provided inexpensively.

This object is achieved by a method of the type mentioned above with the characterizing features of claim 1 and by a system having the characterizing features of claim 8.

Advantageous embodiments of the method and the system can be taken from the subclaims.

The inventive solution is characterized in that the cut-out boards are already stacked and unstacked in the cutting plate, so that a compact cutting tool is created, which ensures a uniform platinum transport to the subsequent forming tools in the same press and expensive separate removal or destacking can be omitted ,

1. a) Anfahren einer Kante der oberen Platine durch die Hubbewegung des Stapelblocks im geklemmten Werkzeug an eine Abweisschräge zum Erzeugen einer in der Ebene der oberen Platine wirkenden horizontalen Schubkraft PS und eine den Stapelblock entgegen der Hubbewegung fixierenden Vertikalkraft PV;
2. b) Lösen der oberen Platine aus ihrer Verkeilung vom Stapelblock durch die Schubkraft gemäß Schritt a) und Verschieben der Platine in die Öffnung des Schiebers und Verkeilen der vom Schneidstempel ausgeschnittenen Platine an das untere Ende des Stapelblocks;
3. c) Halten des Stapelblocks im Schneidplattendurchbruch und Ausschieben der gelösten Platine mit dem Schieber aus dem geöffneten Werkzeug nach Ausfedern der Schneidplatte und der Abstimmplatte.

From the boards stacked in the cutting plate opening of the cutting plate one above the other to form a slightly wedged stacking block, a cut-out board is intermittently cut on the ridge side of the lower board Slightly wedging the stacking block is released and an upper board of the stacking block is released from the stacking block and moved out of the cutting board opening, the following work steps for releasing and removing the board (n-1) are carried out:

1. a) approaching an edge of the upper board by the lifting movement of the stacking block in the clamped tool to a Abweisschräge for generating a acting in the plane of the upper board horizontal thrust force PS and the stacking block against the lifting motion fixing vertical force PV;
2. b) releasing the upper board from its wedging from the stacking block by the pushing force in step a) and sliding the board into the opening of the slider and wedging the board cut by the cutting punch to the lower end of the stacking block;
3. c) holding the stacking block in the cutting plate breakdown and pushing the dissolved board with the slide from the open tool after rebounding of the cutting plate and the tuning plate.

In order to stack the cut-out boards in the cutting plate breakdown of the cutting plate, the cutting plate breakthrough is designed as a stacking space and provided with means, such as local, vertically cut into the wall of the cutting plate breakthrough webs to hold the stacking block even with the tool open. The insert with tuning plate is sprung to compensate for corresponding thickness tolerances of the boards to be stacked and to ensure that the upper board of the stacking block comes to lie completely in the slide after loosening and the slider is free.

The stacking space is associated with a Abweisschräge, which is arranged either in the slide or on the tuning plate. With this Abweisschräge succeeds in a simple manner to produce a horizontal thrust, with which it is possible to easily solve the top board from the stacking block. The slider picks up the loosened board and moves it out of the tool room. This is done in time with the addition of a new board to the lower board of the stacking block.

The free selectability of the position of the boards in relation to the longitudinal axis of the belt leads to a broadening or expansion of the applications of fineblanking and forming operations while optimizing the use of materials, even with parts of high precision and complexity. The boards can take any position with respect to the longitudinal axis of the strip or strip material, for example, the two boards can be rotated 180 ° to each other or the boards are obliquely, longitudinally or transversely to the longitudinal axis of the strip or strip material equal or equivalent nested aligned.

Cutting tool and transfer tool within the system according to the invention are coupled together by a transfer station, wherein a programmable gripper device feeds the board to the transfer station, the latter positioned in the desired position and a gripper transfer feeds the transferred appropriately positioned board to the transfer tool.
This is associated with the extraordinary advantage that short transport routes within the system according to the invention can be realized. This results in a compact design of the system with high modularity and ease of maintenance, which allows a more flexible use when converting the system to different parts geometries or shapes. Conveniently, a plurality of components of the system according to the invention, such as the cutting tool, the transfer tool, the gripper device or the gripper transfer can be modular and install as a compact module and replace.

The inventive method is characterized by short cycle times and high Ausbringleistungen.

Further advantages and details will become apparent from the following description with reference to the accompanying drawings.

embodiment

The invention will be explained in more detail below using an exemplary embodiment.

It show the

Fig. 1 and 2 a schematic representation of the system according to the invention, with which the inventive method is carried out,

Fig. 3a a sectional view of the cutting tool in the clamped state of Werkzeugober- and Tool lower part with free stacking space for boards arranged in the cutting plate opening,

Fig. 3b a sectional view of the arranged in the wall of the Schneidplatturchbruchs holding means for holding the boards in the stacking space,

Fig. 3c a sectional view of the cutting tool in the clamped state of Werkzeugober- and tool base with a arranged in the stacking stack block of n boards,

Fig. 3d a representation of the slightly wedged boards in a stacking block,

Fig. 3e an illustration of an upper board with force diagram starting against a deflection slope,

Fig. 3f a sectional view of the cutting tool in the clamped state of Werkzeugober- and tool base, in which the upper board of the stack block reaches its topmost position,

Fig. 3g a sectional view of the cutting tool in the open state, in which the upper board is detached from the stacking block and detected by the slide opening,

Fig. 3h a sectional view of the cutting tool in the open state, in which the slide is pushed out with board from the tool room,

Fig. 4 a variant of the arrangement of the Abweisschräge on the Abstimmplatte in sectional view,

Fig. 5a and 5b an enlarged view of the stacking block of n-boards in the stacking space of the cutting plate breakdown with open and closed tool for measuring the maximum and minimum height of the stacking block as a function of the thickness tolerance of the sheet,

Fig. 6 a plan view of the cutting tool with representation of the slider in the initial position and in the extended position and the tape running direction and

Fig. 7 a representation of the kinematic coupling of cutting tool and transfer tool and Fig. 8 a schematic representation of the gripper module.

The method according to the invention is intended to produce formed parts 1 from sheet metal, preferably brake lining carriers. However, the method according to the invention is not limited to such parts and the parts may also have other geometric shapes. To produce the formed parts 1 , sheet metal blanks 9, 9.1 are first cut out of a strip or strip material 6 , which receive their final geometry in further forming and cutting operations.

The Fig. 1 and 2 show the system according to the invention, with which the method is carried out. The system essentially consists of a press 2 with two separately driven rams 3 and 4, a coil system 5 for the tape material 6, a straightening unit 7 for directing the strip material 6, a tape feeding 7.1, a Cutting tool 8 for cutting boards 9 from the strip material 6, a waste separator 18, a gripper module 12 for receiving and passing the board 9 to a transfer station 11 a gripper transfer 10, which spans the boards 9 in a predetermined position by the transfer tool, and a modular constructed transfer tool 13 for performing blanking and forming operations on the supplied board 9. the plunger 3 acting vertically upwards on the, between the plunger 3 and the press table 14 fixed cutting tool 8 and the slide 4 vertically downward onto the fixed to the press bed 14 transfer tool 13. Instead of the coil unit 5, the straightening unit 7, the tape feed 7.1 also a strip feeder can be provided.

The course of the method according to the invention is in the Fig. 3a to 3h shown.
The cutting tool 8 is - as in Fig. 3a shown from a tool upper part 15 and a lower tool part 16 together, wherein the cutting tool 8 is opened by a vertical movement downwards and a vertical movement movement is closed upwards.
The tool upper part 15 consists essentially of a cutting plate 17, a regrinding plate 18, a tuning plate 19, a slider 20 and an upper pressure plate 23 and the lower tool part 16 of a guide plate 21, a cutting punch 22 and a lower pressure plate 24. Cutting plate 17, regrinding plate 19th and tuning plate 19 are sprung.

The cutting plate 17 and the tuning plate 19, which to compensate for the insert height Regrinding serves, are thereby movable upwards. Between the tuning plate 19 and the upper pressure plate 23 , the slider 20 is guided. During the cutting process, the slider 20 also serves as a support of cutting plate 17 and tuning plate 19. The slider 20 has a receiving opening 27 for the positive reception of the cut-out boards 9 and 9.1.
In the closed position of the cutting tool 8 , the strip or strip material 6 between the lower tool part 16 and upper die 15 is clamped.

The cutting tool 8 cuts from the supplied strip or strip material 6 two boards 9 and 9.1 per stroke. It is understood that the cutting tool is also interpretable so that more than two boards per stroke can be cut out. The two boards 9 and 9.1 are cut with the bottom punch 22 up in the cutting plate 17 and pushed into the cutting plate opening 25 of the cutting plate 17 . The cutting plate 17 is designed so that the cutting plate opening 25 includes a stacking space 26 forms and for a number n of cut boards 9 and 9.1 can accommodate the latter.

To hold the inserted into the cutting plate opening 25 boards webs 28 are provided which protrude vertically at local locations of the wall of the Schneidplatturchbruchs 25 and form a constriction of the cutting gap 29 , so that the boards of a local clamping effect in the cutting plate opening 25 are subject to and held by them. The webs 28 are arranged so that they in a part of the outer contour of the board 9 and 9.1 to lie that either have to be recut or do not have quality requirements (see Fig. 3b ).

With each stroke of the cutting punch 22 , a board 9 or 9.1 is cut out (see Fig. 3f ) and pushed with its feed side ES to the ridge side GS of the previously cut-out board, so that a stacking block 30 of a number n miteinender slightly wedged boards 9 and 9.1 is formed.
Fig. 3d shows such a stacking block 30 of the boards 9. The ridge side GS of the boards 9 is the cutting punch 22 facing, ie below. The upper part of the board, ie the feed side ES, is at the top.

The slide 20 with which the cut-out boards 9 are pushed out of the tool room W with the tool open, is provided with a Abweisschräge 31 , which is formed in the inner edge of the receiving opening 27 of the slider 20 so that its upper edge OK against its lower Edge UK includes an opening angle α of 10 to 15 ° (see Fig. 3h ). This means that the rear edge HK of the upper board 9 or 9.1 of the stacking block 30 reaches the Abweisschräge 31 when the stacking block 30 completely fills the stacking space 26 and the upper board 9 or 9.1 enters the receiving opening 27 of the slider 20 .

1. a) Anfahren einer Kante der Platine n-1 durch die Hubbewegung des Stapelblocks im geklemmten Werkzeug an der Abweisschräge 31 zum Erzeugen einer in der Ebene E der Platine n-1 wirkenden horizontalen Schubkraft PS und eine den Stapelblock 30 entgegen der Hubbewegung fixierenden Vertikalkraft PV;
2. b) Lösen der Platine n-1 aus ihrer Verkeilung vom Stapelblock 30 durch die Schubkraft PS, Verschieben der gelösten Platine n-1 aus dem Stapelblock 30 in den Schieber 20 und Verkeilen der vom Schneidstempel 22 durchgetrennten Platine n+1 an das untere Ende des Stapelblocks 30;
3. c) Halten des Stapelblocks im Schneidplattendurchbruch und Ausschieben der gelösten Platine n-1 aus dem geöffneten Werkzeug.

The boards 9 and 9.1 are stacked in the cutting plate opening 25 of the cutting plate 17 and form a slightly wedged stacking block 30 of n-boards. At intervals, a cut-out board n + 1 on the ridge side of the lower board of the stacking block slightly wedged and an upper board n-1 detached from the stacking block (see Fig. 3e and 3f ). The detached board is moved out of the cutting board opening 25 , whereby the following steps for releasing and removing the board n-1 are carried out:

1. a) approaching an edge of the board n-1 by the lifting movement of the stacking block in the clamped tool on the Abweisschräge 31 for generating a acting in the plane E of the board n-1 horizontal thrust force PS and the stacking block 30 against the lifting movement fixing vertical force PV;
2. b) releasing the board n-1 from its wedging from the stacking block 30 by the pushing force PS, moving the released board n-1 from the stacking block 30 into the slider 20 and wedging the severed by the cutting punch 22 board n + 1 to the lower end of the Stacking blocks 30;
3. c) Holding the stacking block in the cutting plate opening and pushing out the dissolved board n-1 from the opened tool.

As Fig. 4 alternatively shows, the Abweisschräge 31 may also be arranged on the tuning plate 19 . The opening angle α of the Abweisschräge 28 corresponds to the angle of Abweisschräge in the slide 20th

The lying in the sliding direction edge of the tuning plate 19 is provided with a slope 32 so that the Ridge side of the board 9 or 9.1 is not pending or hooked.

Once the top board 9 and 9.1 reaches the deflector slope 31 due to the lifting movement of the stacking block 30 in the plane E of the upper plate of the stacking block 30 is generated, the horizontal thrust PS counter to the stroke movement and a vertical force component PV. The horizontal thrust PS solves the slight wedging of the wedged together boards and allows the dissolved board 9 and 9.1 to move into the receiving opening 27 of the slider 20 (see Fig. 3e ).

Fig. 3g shows the step after opening the cutting tool 8, in which the tool base 16 moves down and the guide plate 21 has stripped the strip or strip material 6 , the cutting plate 17 springs and the upper board 9 and 9.1 is free and through the slide 20 can be ejected from the tool room W.

Fig. 3h shows the slider 20 in its fully moved out of the tool room W position.

The course of the method according to the invention results in principle from the following description. The cutting punch 22 moves driven by the plunger 3 of the press from bottom dead center UT toward the top dead center OT. The slider 20 is in its rear end position as the Fig. 6 shows. The cutting punch 22 and the guide plate 21 lift the strip or strip material 6 and the cutting plate 17 with Tuning plate 19 is pushed up, that is cutting and tuning plate springs. The slider 20 is clamped between regrinding plate 18 and upper pressure plate 23 . In this state, cutting begins (see Fig. 3c and 3f ). Once the punch 22 reaches the top dead center TDC , this moves with the plunger 3 and the lower pressure plate 24 downwards, ie in the direction of press table or lower pressure plate 24. The guide plate 21 of the cutting punch 22 springs out and touches the tape or Strip material 6 off ( Fig. 3g ). The tool is open and the cutting plate 17, the tuning plate 19 and the stacking block 30 also spring out, ie move down. The slider 20 is free for pushing out (see Fig. 3h ).

und $$\mathrm{z}>\left(\mathrm{n}-1\right){\mathrm{S}}_{\max }-\mathrm{b},$$

worin bedeuten:

• n Anzahl der Platinen im Stapelblock,
• S_max maximale Blechdickentoleranz,
• S_min minimale Blechdickentoleranz,
• b Höhe des Schneidplattendurchbruchs plus Höhe der Abstimmplatte,
• a Höhe der unteren Kante der Schräge 32 ab Unterkante Schneidplatte,
• z Federweg von Schneid- und Abstimmplatte.

In the Fig. 5a and 5 b the conditions are clarified that must be complied with, so that even with fluctuating plate thickness of the boards, the upper board of the stacking block 30 is freely displaceable and the next block in the stacking block of the upper board still remains in the stacking block when loosening the upper board.
Taking into account the sheet thickness tolerance, the maximum and minimum height of the stack block must satisfy the following conditions. $$\mathrm{a}<\left(\mathrm{n}-1\right)\times {\mathrm{S}}_{\min }$$

and $$\mathrm{z}>\left(\mathrm{n}-1\right){\mathrm{S}}_{\mathrm{Max}}-\mathrm{b}.$$

in which mean:

• n number of boards in stacking block,
• S _max maximum sheet thickness tolerance,
• S _min minimum sheet thickness tolerance,
• b Height of the cutting plate breakthrough plus height of the tuning plate,
• a height of the lower edge of the bevel 32 from the lower edge of the insert,
• z Spring travel of cutting and tuning plate.

The height of the cutting plate 17 and tuning plate 19 to be selected depends on the material thickness of the board 9 or 9.1 to be stacked . Thus, the thickness tolerances can be compensated and the slider 20 is free, the cutting plate 17 are sprung with tuning plate 19 .

In Fig. 6 the cutting tool 8 is shown with two cutting dies 22 . The slider 20 is in the starting position and the running direction L of the strip or strip material 6 is perpendicular to the slide axis SA of the slider 20. The two cutting punch 22 are offset in the direction L of the strip or strip material 6 to each other.

Each cutting punch 22 is associated with a slide 20 for pushing out the boards 9 and 9.1 from the tool room W , with quite a single slider for both boards is conceivable. In this example, it is a linear slider, which is moved by a drive, such as stepping gear, servo motor, speed or linear motor and brings the two boards in a takeover position 33 . It is understood that the slider 20 may also be designed as a rotary valve, without departing from the invention. The rotary valve has the advantage that no forward and backward movement is necessary and thus the time in which the tool is open, ie the slide 20 is free, can be shorter.

For each slide 20 a correspondingly adapted to the movement sequence of the slider controlled ejector 34 is provided, which pushes the two boards 9 and 9.1 in the gripper device 12 (see Fig. 7 ). The ejector 34 go back to its original position after this operation.

The gripper module 12 is expediently designed as an XYZC axis module (see Fig. 8 ), whose positions are freely programmable, wherein the axis movements of the module to move the press ram 3, including the gripper transfer run synchronized.
The gripper module 12 engages the respective board, holds the latter non-positively and positively and positions the board in the desired position on the transfer station 11, from which the board is fed to the transfer tool for further forming.

LIST OF REFERENCE NUMBERS remolded 1 Press 2 Pestle of the press 3, 4 Coil Line 5 Ribbon or strip material 6 straightening unit 7 Tape or strip feed 7.1 cutting tool 8th boards 9, 9.1 gripper transfer 10 Transfer station 11 gripper module 12 transfer tool 13 press table 14 Tool top 15 Tool base 16 cutting board 17 waste separator 18 tuning plate 19 pusher 20 guide plate 21 cutting punch 22 upper pressure plate 23 lower pressure plate 24 Schneidplattendurchdringung 25 stacking space 26 Receiving opening in 20 27 Stege 28 cutting gap 29 stacking block 30 deflector slope 31 Sloping at 19 32 over position 33 ejector 34 Plane of the board to be detached e Feed side to board IT Burr side to board GS Back edge on board HK Direction of 6 L upper edge of 27 OK Top Dead Center OT horizontal thrust PS vertical force component PV slide axis SA lower edge of 27 UK bottom dead center UT tool room W

Claims (15)

1. Method for the production of sheet metal forming parts of any geometrical shape from strip material in a press with two separately driven rams, wherein at first blanks are cut out of the strip material by a driven by the first ram cutting tool with a shearing punch moving upwards in the direction of the cutting die (die plate) and after the cutting tool opened by a slide are transferred out of the tool to a claw device which brings the blanks to a transfer station and from there by a claw transfer they are synchronous fed to a transfer tool driven by the second ram of the press for forming their final geometry, characterized in that the blanks (9, 9.1) are piled up in the opening (25) of the cutting die one over the other to a slightly wedged pile block (30) of n blanks to which according to the working cycle is added slightly wedging a cut out blank (n + 1) at the raw edge of the lower blank of the pile block and an upper blank (n - 1) is detached from the pile block and shifted from the opening of the cutting die, wherein the following working steps are carried out to detach and remove the blank (n - 1):

   a) Moving one edge of the blank (n - 1) to a guiding bevel (31) by the lifting movement of the pile block in the clamped tool for creating a horizontal sliding force (PS) effective in the plane (E) of blank (n - 1) and a vertical force (PV) fixing the pile block against the lifting movement;

   b) Detaching the blank (n - 1) from its wedging with the pile block by the sliding force (PS) according to step a), sliding blank (n - 1) out of the pile block into the slide and wedging the cut out by the shearing punch blank (n + 1) to the lower end of the pile block;

   c) Holding the pile block in the opening of the cutting die and sliding the detached blank (n - 1) out of the opened tool.
2. Method according to claim 1, characterized in that the sliding force (PS) is created by a guiding bevel of 10° to 15°.
3. Method according to claims 1 and 2, characterized in that the sliding force (PS) for detaching the blank (n - 1) from the pile block is created by the slide (20) provided with the guiding bevel (31).
4. Method according to claims 1 and 2, characterized in that the sliding force (PS) for detaching the blank (n - 1) from the pile block is created by an adjusting plate provided with the guiding bevel (31) belonging to the cutting tool.
5. Method according to claims 1 to 4, characterized in that as slides are used linear or rotary slides.
6. Method according to claim 1, characterized in that the pile block is clamped and hold in the opening of the cutting die.
7. Method according to claim 1, characterized in that the blanks are cut out of the strip in the same direction or in the diametrically opposed direction with regard to the orientation towards the longitudinal axis of the strip.
8. System for the production of sheet metal forming parts of any geometrical shape from strip material realizing the method according to claim 1 with a press (2) comprising two separately driven rams (3, 4), at least one driven by the first ram (3) of the press cutting tool (8) for cutting blanks (9, 9.1) out of the strip material, the lower tool part (16) of which essentially contains a pressure pad (21) and a shearing punch (22) and the upper tool part (15) of which essentially consists of cutting die (17), adjusting plate (19) and slide (20), a claw device (12) for transferring the blanks into a transfer station (11) for a claw transfer (10), which feeds the blanks to a driven by the second ram (4) of the press transfer tool (13) for forming the blank into the final geometry of the forming part, characterized in that the cutting die (17) of the cutting tool (8) within its cutting die opening (25) has a pile space (26) for receiving a pile block (30) consisting of a number (n) of cut out slightly wedged with each other blanks, wherein the pile space (26) is allocated a provided at slide (20) and/or at the adjusting plate (19) guiding bevel (31) for detaching a blank (n-1) from the pile block (30), and that the cutting die opening (25) is provided with means (28) to hold the pile block (30) in the pile space (26) when the cutting tool is open.
9. System according to claim 8, characterized in that the guiding bevel (31) is formed at the receiving opening (27) of the slide (20) .
10. System according to claims 8 and 9, characterized in that the guiding bevel (31) has an angle (α) von 10° to 15°.
11. System according to claim 8, characterized in that the adjusting plate (19) has a bevel (32) for the adjacent bur of the blanks.
12. System according to claim 8, characterized in that as slide (20) is provided a linear or rotary slide.
13. System according to claim 8, characterized in that the means for holding the pile block (30) in the pile space (26) of cutting die (17) are brackets (28) vertically projecting from the wall of cutting die opening (25).
14. System according to claim 8, characterized in that in the cutting tool (8) at least two blanks are cut out per stroke, which with regard to the orientation towards the feeding direction (L) of the strip (6) are arranged in the strip in the same direction or in the diametrically opposed direction.
15. System according to claim 8, characterized in that the cutting tool (8) and the transfer tool (13) are kinematicly coupled by a freely programmable claw module (12) and a claw transfer (10) synchronized with the ram (3, 4).

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