EP3797893B1 - Device for the fine cutting / normal stamping of blanks made from a metal strip and for the multi-stage machining of the blanks by means of cutting and machining tools - Google Patents

Description

The invention relates to a device for fine blanking/standard punching of blanks from a metal strip and for multi-stage machining of the blanks using cutting and machining tools, the blanks being punched out being fed to the various machining tools on both sides of the metal strip by at least one rotary slide having transfer openings.

Such a device is already basically from the EP 2 842 654 B1 known, which has the title "Apparatus and Method for Transferring Workpieces into and Out of a Tool".

However, the device for fine blanking of blanks according to the prior art has the fundamental disadvantage that the overall size of the device is very large, especially when it has numerous machining tools for the blank.

The object of the invention is therefore to create a new device for fine blanking/standard punching of blanks from a metal strip and for multi-stage processing of the blanks using cutting and processing tools, with which a larger number of of cutting and processing tools can be used.

The solution to the problem results from the features of patent claim 1, which reads as follows:
Device for fine cutting / normal punching of blanks from a metal strip and for multi-stage processing Blanks by means of cutting and processing tools, the blanks being punched out being fed to the various processing tools on both sides of the metal strip by at least one rotary slide having transfer openings, characterized in that at least two spaced-apart, driven rotary slides each having a plurality of transfer openings are arranged on both sides of the metal strip, where two transfer openings of different rotary slides have intersecting trajectories, with the intersection of the trajectories corresponding to the transfer position of the machined blank/workpiece.

The device according to the invention has the significant advantage that a large number of cutting and processing tools can be positioned in a very small space, not only through the use of at least two spaced-apart driven rotary slides, but even more importantly through the intersecting movement paths of the different transfer openings of the rotary slides At the same time, the overall size of the device does not increase.

Advantageously, it is even possible to arrange a larger number of cutting and processing tools for normal punching or fine blanking in a smaller overall size of the device in order to produce "two-dimensional" workpieces.

"Normal stamping" means the production of components with the help of a press and a cutting tool without using a counter force / ring tooth force.

The term "fineblanking", on the other hand, describes the production of components using a press and a cutting tool using a counterforce with or without ring teeth, but with hold-down force.

In the following, the tools are referred to as punching tools, regardless of whether they are "standard punching" or "fine blanking".

In this application, the term “two-dimensional” workpiece is to be understood as meaning that the dimensions of the workpiece lie within the contour of the rotary slide after machining. In contrast to this, the term "three-dimensional" workpiece is to be understood as meaning a workpiece whose dimensions extend at least partially outside the contour of a rotary slide.

In an advantageous embodiment of the invention, the at least two rotary slides are also arranged in the device so that they can move vertically. Consequently, it is possible in a particularly advantageous manner not only to machine blanks which, even after machining, are completely immersed in the contour of the rotary slide, but also to produce blanks which clearly protrude beyond the contour of the rotary slide.

Due to the vertical movement of the rotary slide, the area of use of the device according to the invention is significantly larger, which has a positive effect on the manufacturing costs of each individual workpiece.

In principle, it is also possible for three rotary slides to cooperate on both sides adjacent to the metal strip, in which case the transfer openings of the rotary slides then also have intersecting movement paths. The advantage of this arrangement is that even more cutting and processing tools can be arranged in the overall device in a relatively small space.

Figur 1

eine perspektivische, schematische Gesamtansicht einer ersten Ausführungsform der Vorrichtung aus Ober- und Unterwerkzeug,

Figur 2

eine perspektivische, schematische Ansicht des Oberwerkzeugs,

Figur 3

eine perspektivische, schematische Ansicht des Unterwerkzeugs einschließlich Metallband,

Figur 4

eine schematische Darstellung einer ersten Ausführungsform der Vorrichtung mit zwei Drehschiebern,

Figuren 5 bis 6c

schematische Darstellung der ersten Bearbeitungsstation eines Rohlings in einer zweiten Ausführungsform mit zwei Drehschiebern in der Draufsicht und als Schnittdarstellung,

Figuren 7 bis 20

schematische Darstellungen der einzelnen, weiteren Stationen des Rohlings / teilbearbeiteten Werkstücks in der zweiten Ausführungsform der Vorrichtung mit zwei Drehschiebern in der Draufsicht,

Figur 21

Darstellung eines fertigen "zweidimensionalen" Werkstücks, welches mit einer Vorrichtung gemäß Fig. 4 gefertigt worden ist,

Figur 22

perspektivische, schematische Darstellung einer dritten Ausführungsform der Vorrichtung mit drei Drehschiebern und einem Metallband,

Figuren 23 bis 40

Darstellung der einzelnen Positionen eines beispielhaften Rohlings / teilbearbeiteten Werkstücks beim Durchlauf durch eine Vorrichtung mit drei Drehschiebern gemäß Fig. 22 bis 44 in Draufsicht,

Figur 41

schematische Darstellung einer vierten Ausführungsform der einer Vorrichtung eines mit zwei vertikal unterschiedlich beweglichen Drehschiebern und

Figuren 42 bis 44

Darstellung von fertigen "dreidimensionalen" Werkstücken, die mit einer Vorrichtung gemäß Figur 5 bis 20a gefertigt worden sind.

Further advantages of the invention result from the following dependent claims and from the description of several exemplary embodiments. Show it:

figure 1

a perspective, schematic overall view of a first embodiment of the device from the upper and lower tool,

figure 2

a perspective, schematic view of the upper tool,

figure 3

a perspective, schematic view of the lower tool including metal strip,

figure 4

a schematic representation of a first embodiment of the device with two rotary slides,

Figures 5 to 6c

schematic representation of the first processing station of a blank in a second embodiment with two rotary slides in plan view and as a sectional view,

Figures 7 to 20

schematic representations of the individual, further stations of the blank / partially machined workpiece in the second embodiment of the device with two rotary slides in plan view,

figure 21

Representation of a finished "two-dimensional" workpiece, which according to a device 4 has been manufactured

figure 22

perspective, schematic representation of a third embodiment of the device with three rotary slides and a metal strip,

Figures 23 to 40

Representation of the individual positions of an exemplary blank / partially machined workpiece as it passes through a device with three rotary slides according to Figures 22 to 44 in top view,

figure 41

schematic representation of a fourth embodiment of a device with two vertically differently movable rotary slides and

Figures 42 to 44

Representation of finished "three-dimensional" workpieces with a device according to figure 5 have been manufactured up to 20a.

In the figures, the device according to the invention for fine blanking/standard blanking is provided with the reference number 10 as a whole.

the figure 1 shows a perspective overall view of a first embodiment of the device 10. The device 10 consists of an upper tool 11 and a lower tool 12, which holds a metal strip 13. The metal strip 13 moving in the direction of an arrow T has punched holes SL.

The upper tool 11 consists of a base plate 14 and a downstream intermediate plate 15. Between the base plate 14 and the intermediate plate 15, the upper tool 11 has guide columns 17 which are guided through the intermediate plate 15 in order to cooperate with guide bushings 30 of the lower tool 12.

In addition, the figure 1 Active elements F of the upper tool 11, which form cutting and processing tools 21 at the ends, which in 2 are shown in detail.

The lower tool 12 consists of a base plate 29 with the guide bushings 30. When the device 10 is in the closed state, the guide columns 17 of the upper tool 11 engage in the guide bushings 30 of the lower tool 12.

On the base plate 29 there are also two identically configured matrix receptacles 31, in which 1 only a matrix receptacle 31 can be seen. The second die holder 31 is rotated by 180° about a center point (not shown) (see black box BX ₂ in 3 ) arranged on the opposite side of the metal strip 13.

The matrix receptacles 31 form a recess for the arrangement of a chute 32, via which the finished workpieces W are discharged from the device 10.

In the figure 2 the upper tool 11 is shown in detail in perspective from below. Guide plates 16 and 19 with active elements of the upper part are arranged on the intermediate plate 15 . In addition, two strip guide elements 18 are fastened to the base plate 14, which serve to guide the metal strip 13 (not shown). The guide plate 19 has two first punching tools 20 . These punching tools 20 are used from the 1 illustrated metal strip 13 to work out the blanks R.

Above the intermediate plate 15 are those with pressure bolts D (see 1 ) to be moved guide plates 16 and 19 with cutting and machining tools 21 provided. The aforementioned processing tools 21 are punching tools 22, an embossing tool 23, second punching tools 24, third punching tools 25, edge embossing tools 26, lettering embossing tools 27 and ejectors 28.

A black box BX ₁ is shown on the other side of the metal strip 13 . This black box BX ₁ is a placeholder for a second guide plate 16 which, starting from the aforementioned first guide plate 16 and the processing tools 21, is arranged rotated by 180° about a central axis of the device 10 (not shown).

the figure 3 shows the lower tool 12 in perspective from above in detail. In the figure 3 the arrangement of the matrix receptacle 31 can be seen.

A first rotary valve 33 and a larger, second rotary valve 34 are in figure 4 pivot pin units 36, 37 shown are arranged rotatably in the matrix receptacle 31, the two rotary slides 33, 34 being driven together.

The rotary slides 33 and 34 each have transfer openings 35, which serve to receive the blanks R/partially machined workpieces W. The first rotary slide 33 has three transfer openings 35.1 to 35.3 and the second rotary slide 34 has three transfer openings 35 4 to 35.7. The finished workpiece W is removed from the device 10 in the direction of the arrow C from the transfer opening 35.7.

The transfer openings 35.1 to 35.7 of the rotary slides 33, 34 are provided with clamping grippers, not shown, which hold the blanks R or the workpieces W firmly in the respective transfer openings 35.1 to 35.7 during transport within the device, so that they are held securely in the rotary slides 33, 34 can be transported.

The partially machined workpieces W are each shown as an example in the transfer openings 35.1 to 35.7.

The partially machined workpieces W have already been machined using the tools 22 to 27 . The machining of the partially machined workpieces W with the tools 22 to 27 takes place when the upper tool 11 and lower tool 12 are moved together. For this purpose, the active elements F of the upper tool 11 (see 2 ) are pressed with their free ends, which are designed as tools 22 to 27, onto the blanks R/partially machined workpieces W resting on the ejector units 38, so that these are machined in accordance with the tools 22 to 27.

Below the transfer opening 35.1 is the workpiece W ₂₂ , which has been machined using the tool 22. The partially machined workpiece W ₂₃ is then arranged below the transfer opening 35.2, which was previously embossed by means of the embossing tools 23.

Below the transfer opening 35.3, the partially machined workpiece W ₂₄ is arranged, which was produced by means of the second punching tool 24.

Below the transfer opening 35.4, the partially processed workpiece W ₂₅ is shown, which has been formed from W ₂₄ into the partially processed workpiece W ₂₅ by means of the third punching tool 25 .

Furthermore, the partially machined workpiece W ₂₆ , which has already been formed by the edge embossing tool 26 , lies below the transfer opening 35 . 5 .

Below the transfer opening 35.6 is the workpiece W ₂₆ that has been reworked with the lettering embossing tool 27 .

Finally, the finished workpiece W ₂₇ is transferred into the transfer opening 35.7, so that the finished workpiece W ₂₇ by means of the in the 2 shown ejector 28 is discharged from the device 10.

In a way that is not shown, ejector units 38.1 to 38.8 are arranged in the die receptacle 31, on which the blank R/partially machined workpiece W ₂₂ to W ₂₇ is arranged during machining.

the figure 4 shows the schematic representation of a first embodiment of the device 10 with the first rotary valve 33 and the second rotary valve 34, which are driven together and are always moved within a common plane.

For the sake of simplicity, the upper tool 11 and lower tool 12 in the figure 4 not shown.

The first rotary valve 33 is fixed on the pivot pin unit 36 and the second rotary valve 34 on the pivot pin unit 37 . The first rotary slide 33 forms the transfer openings 35.1 to 35.3 and the second rotary slide 34 forms the transfer openings 35.4 to 35.7.

The path of movement of the blanks R/partially machined workpieces W (not shown) from the first rotary slide 33 to the second rotary slide 34 and out of the device 10 is shown on the basis of the dashed line L (see FIG 20 ) shown schematically.

the figure 21 Figure 12 shows the finished "two-dimensional" workpiece W ₂₇ which has been punched, embossed, punched twice, edge embossed from below and from above and letter embossed.

In the Figures 5 to 20 a second embodiment of the device 10 is shown. For the sake of simplicity, the movement sequence of just one blank R/workpiece W is shown purely schematically, with all transfer openings 35.1 to 35.7 of the rotary slides 33, 34 actually being occupied by a blank R/partially machined workpiece W during operation of the device 10, so that a total of 14 Blanks / partially machined workpieces W can be produced simultaneously.

the Figures 5 to 20 show different positions of the rotary slide 33 and 34 in plan view including a blank R / partially machined workpiece W, while the Figures 5a and 6a show the associated sectional views according to section lines Va to Vla. In the figures 5b , 6b and 6c are intermediate positions between the figures 5 and 7 shown.

In the Figures 5 and 5a are the rotary valve 33, 34 in a starting position A ₁ . The blank R has already been punched out of the metal strip 13 and, as in Figure 5a to see on an ejector unit 38.1 in a plane H- ₁ . The metal band 13 and the rotary slides 33, 34 are arranged in a plane H ₀ .

the Figure 5b shows that the blank R is still on the ejector unit 38.1 in a plane H _-1 . The metal strip 13, on the other hand, has been moved to the level H ₁ so that a free space is created between the blank R and the metal strip 13 . The rotary slides 33 and 34 remain in the starting position A ₁ in the plane H ₀ .

In the operating situation between the Figure 5b and Fig. 6 / 6a the upper tool 11, on which the metal strip 13 is guided, was moved into the open position, so that the metal strip ₁₃ is now in a plane H2.

the Figures 6 to 6c show the pick-up position A ₂ . The rotary valve 33, 34 are in the Figures 6 and 6a still arranged in the plane H ₀ . However, the rotary slide 33 has now been moved in the direction of P1 over the blank R, which is still lying on the ejector unit 38.1 in the plane H _-1 . Parallel to the rotational movement of the first rotary slide 33, the second rotary slide 34 was moved counterclockwise in direction P ₂ so that the first rotary slide 33 has sufficient free space for the opposite movement in direction P ₁ .

Subsequently, as in Figure 6b shown, the ejector unit 38.1 has been moved to the H ₀ plane, so that the blank R is now also in the H ₀ plane. The transfer of the blank R from the ejector unit 38.1 into the transfer opening 35.1 of the rotary slide 33 is shown in synopsis Figures 6b and 6c consider. The blank R is transferred from the ejector unit 38.1, for example by means of a spring element (not shown), into the transfer opening 35.1 of the rotary slide 33, which is also located in the plane H ₀ .

After the transfer to the transfer opening 35.1, in which the blank R is now clamped, the rotary slide 33 is moved vertically into the level H ₁ and shifted from the pick-up position A ₂ to the next processing position, in which the blank R is now moved to the next Ejector unit 38.2 in level Ho, as in 7 shown, relocated and reworked into workpiece W ₂₂ .

The process from machining the blank R or the partially machined workpiece W ₂₂ to the workpiece W ₂₇ in 19 , Based on the change from the starting position A ₁ to the pick-up position A ₂ of the metal strip 13, the rotary valve 33, 34 and the workpiece W, takes place in accordance with the above-described process according to Figures 5 to 6c .

In the 11 the transfer of the workpiece W ₂₄ from the rotary slide 33 to the rotary slide 34 is also shown. The transfer openings 35.3 of the rotary slide 33 and the transfer opening 35.4 of the rotary slide 34 have movement paths B that intersect. The respective trajectories are shown by the dotted line B. In this transfer position, the completely overlapping movement paths B overlap the transfer openings 35.3. of the rotary slide 33 and the transfer opening 35.4.3 of the rotary slide 34. This means that the processed workpiece W ₂₄ has been deposited from the transfer opening 35.3 of the first rotary slide 33 into the transfer position on an ejector unit, not shown.

After the rotary slide 33 has moved away from this transfer position, the second rotary slide 34 with the transfer opening 35.4 is moved into the transfer position in order to pick up the partially machined workpiece W ₂₄ with the transfer opening 35.4 from the ejector unit described above in order to take the workpiece W ₂₄ to the next machining position to be transported further.

Ultimately, the 20 the ejection of the finished workpiece W ₂₇ from the device 10 using the ejector 28 (not shown) in direction C.

This special arrangement and the interaction of the rotary slides 33, 34 make it possible for a larger number of cutting and machining tools to be arranged and used in the smallest possible space and thus in a smaller overall size of the device.

In addition, due to the vertical mobility of the rotary slides 33, 34, it is possible to produce "three-dimensional" workpieces W, which are partially machined outside the contour of the respective rotary slides 33, 34 and can be transported. Exemplary workpieces W are detailed in the Figures 42 to 44 pictured.

In the figure 22 is a schematic representation of a third embodiment of the device 10 with three rotary slides 39, 40, 41, which are driven together and are always arranged in the same plane. The rotary slides 39, 40, 41 are arranged on pivot bolt units, not shown, which enable the rotary movement of the rotary slides 39, 40 and 41, respectively.

The rotary slides 39, 40 and 41 are each provided with transfer openings 42 for receiving blanks R/partially machined workpieces W. The rotary slide 39 forms two transfer openings 42.1 and 42.2, the second rotary slide 40 forms two transfer openings 42.3 and 42.4 and the third rotary slide 41 forms four transfer openings 42.5 to 42.8. the end.

The dashed line L shows schematically the path of movement of the blank R/partially machined workpiece W from the first rotary slide 39 to the third rotary slide 41 and out of the device 10, as shown by the arrow C, out.

the Figures 23 to 40 show the individual processing and pick-up positions of the blank R/partly processed workpiece W, which is moved from the first rotary slide 33 to the third rotary slide 39 within the device 10.

In the 23 is the starting position A ₁ of the respective rotary slide 39, 40 and 41 in relation to the metal strip 13 is shown.

In the Figures 24 to 40 the respective direction of rotation of the rotary slides 39, 40 and 41 is shown by means of the directional arrows P ₁ to P ₃ .

the Figures 23 to 40 show the trajectory of the blank R / partially machined workpiece from the metal strip 13 to ejection from the device 10 by means of the rotary slides 39, 40 and 41. In each intermediate position, the blank R / the partially machined workpiece W is machined using eight different tools. For the sake of simplicity, one blank R / one workpiece W in all Figures 23 to 40 shown undifferentiated as a blank R, although this has also been processed step by step by tools and formed into a workpiece W.

the figures 27 and 31 show the respective transfer positions of the blank R/the partially machined workpieces W to the respective subsequent rotary slide 40, 41. In 27 the transfer of the partially machined workpiece W from the first rotary slide 39 to the second rotary slide 40 is shown in detail. The respective trajectories are shown by the dotted line B. In this transfer position, the completely overlapping movement paths of the transfer openings 42.2 of the rotary slide 39 and the transfer opening 42.3 of the rotary slide 40 overlap. This means that the blank R / the machined workpiece W from the transfer opening 42.2 of the first rotary slide 39 into the transfer position on a not shown Ejector unit has been filed.

After the rotary slide 39 has moved away from this transfer position, the second rotary slide 40 with the transfer opening 42.3 was moved into the transfer position in order to pick up the blank / the partially machined workpiece W with the transfer opening 42.3 from the ejector unit described above in order to move the workpiece W to the next To transport further processing position.

the figure 31 shows a transfer of the partially machined workpiece W from the second rotary valve 40 to the third rotary valve 41, wherein the Movement paths of the transfer opening 42.4 of the second rotary slide 40 and the transfer opening 42.5 of the third rotary slide 41 also completely overlap here, as already shown in FIG 27 described.

In the figure 40 is the finished workpiece W using the in 2 shown ejector 28 discharged from the third rotary valve 41.

the figure 41 shows the schematic representation of a fourth embodiment of the device 10 with two differently vertically movable rotary slides 43, 44. The rotary slides 43, 44 form the transfer openings 45.1 to 45.7.

In the figure 41 is shown that the respective rotary valve 43, 44 are arranged in different planes. The two rotary slides 43, 44 are designed to be rotatable by means of a pivot pin unit (not shown). The directional arrows P ₄ and P ₅ show the respective directions of movement of the rotary slides 43, 44, with an arrow V showing the direction of movement of the metal strip 13.

Of course, it is also possible that, for example, the three rotary valves 39, 40, 41 according to Figures 22 to 40 are arranged differently vertically movable.

the Figures 42 to 44 show exemplary workpieces W, which with the device according to Figures 5 to 20 have been manufactured.

Overall, the device 10 according to the invention for fine blanking/standard punching allows the arrangement of a large number of cutting and processing tools 21 with the same size of installation space.

Reference List

10

contraption

11.

upper tool

12.

lower tool

13.

metal strap

14

base plate

15

intermediate plate

16

Guide plate with active elements of the upper part

17

guide column

18

strip guide element

19

Guide plate with active elements of the upper part

20

first punching tool

21

editing tool

22

punch tool

23

embossing tool

24

second punch tool

25

third punch tool

26

edge embossing tool

27

lettering embossing tool

28

ejector

29

base plate

30

guide bushes

31

Die holder with active elements of the lower part

32

slide

33

first rotary valve of the first and second embodiment

34

second rotary valve of the first and second embodiment

35.1 - 35.7

Transfer opening of rotary valves 33, 34

36

Pintle unit from 33

37

Pintle unit of 34

38.1 to 38.7

ejector unit

39

first rotary valve according to the third embodiment

40

second rotary valve according to the third embodiment

41

third rotary valve according to the third embodiment

42.1 to 42.8

Transfer opening of rotary valves 39 to 41

43

first rotary valve according to the fourth embodiment

44

second rotary valve according to the fourth embodiment

45.1 to 45.7

Transfer openings of rotary valves 43, 44

A1 =

starting position

A2 =

collection position

B =

trajectory

BX1 =

Black box in 11

BX2 =

Black box in 12

C =

Directional arrow of the transport

D =

pressure bolt

F =

Active element of the upper part

L =

trajectory

H-1 =

Ejector unit level 38, blank R / partially machined workpieces W ₂₂ to W ₂₇

H0 =

Level of the ejector unit 38, rotary slide 33, 34, metal strip 13, blank R / partially machined workpieces W ₂₂ to W ₂₇

H1 =

Level of the rotary valve 33, 34 and metal strip 13

H2 =

Level of the metal band 13

O =

top

P1 =

Direction arrow from 33

P2 =

Direction arrow from 34

P3 =

Direction arrow from 39

P4 =

Direction arrow from 43

P5 =

Direction arrow from 44

R=

blank

SL=

punch hole

T =

direction of movement of 13

V =

movement arrow

W =

workpiece

W22 =

perforated workpiece

W23=

embossed workpiece

W24=

stamped workpiece

W25=

re-stamped workpiece

W26 =

edge stamped tool

W27 =

embossed, finished workpiece

Claims (9)

1. Device (10) for precision cutting/nonnal punching of blanks (R) from a metal strip (13) and for multi-stage machining of the blanks (R) by means of cutting and machining tools (21), wherein the punched blanks (R) are fed to the various machining tools (21) on both sides of the metal strip (13) in each case by at least one rotary slide (33, 34) having transfer openings (35), characterised in that at least two spaced-apart, driven rotary slides (33, 34), each having a plurality of transfer openings (35), are arranged on each side of the metal strip (13), wherein two transfer openings (35) of different rotary slides (33, 34) have intersecting movement paths (B), wherein the intersection of the movement paths (B) corresponds to the transfer position of the machined blank (R) / (workpiece W).
2. Device (10) according to claim 1, characterised in that the at least two rotary slides (33, 34; 43, 44) are arranged vertically moveably in the device.
3. Device (10) according to claim 1 or 2, characterised that the at least two rotary slides (33, 34; 43, 44) are driven in opposite directions.
4. Device (10) according to one of the preceding claims, characterised in that three rotary slides (39, 40, 41) cooperate with one another adjacent to the metal strip (13) on both sides.
5. Device (10) according to one of the preceding claims, characterised in that the adjacent rotary slides (33, 34; 39, 40, 41; 43, 44) arranged on both sides of the metal strip (13) have drives which are positively coupled to one another.
6. Device (10) according to one of the preceding claims, characterised in that the respective adjacent rotary slides (33, 34; 39, 40, 41; 43, 44) form geometric shapes which differ from one another and partially interlock in the rotary movement.
7. Device (10) according to one of the preceding claims, characterised in that, in each case, two of the rotary slides (33, 34; 39, 40, 41; 43, 44) arranged on both sides of the metal strip (13) form identical geometric shapes.
8. Device (10) according to one of the preceding claims, characterised in that one of the rotary slides (34, 41, 43) is approximately trapezoidal in shape.
9. Device (10) according to one of the preceding claims, characterised in that one of the rotary slides (33, 39, 40, 43) is approximately triangular in shape.

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