ES2912562T3 - Device for precision cutting / normal punching of blanks from a metal strip as well as for multi-stage machining of blanks by means of cutting and machining tools - Google Patents

Abstract

Device (10) for precision cutting / normal punching of blanks (R) from a metal strip (13) as well as for multi-stage machining of the blanks (R) by means of cutting tools and machining (21), the punched blanks (R) being fed to the different machining tools (21) on both sides of the metal strip (13), respectively by at least one rotary slider (33, 34) that presents transfer openings (35), characterized in that, on both sides of the metal band (13), at least two rotating sliders (33, 34) located at a distance and actuated are respectively arranged, each having a plurality of transfer openings ( 35), presenting two transfer openings (35) of different rotary sliders (33, 34) paths of movement (B) that intersect, the intersection of the paths of movement (B) corresponding to the transfer position of the blank (R) / (workpiece W) machined.

Description

DESCRIPTION

Device for precision cutting / normal punching of blanks from a metal strip as well as for multi-stage machining of blanks by means of cutting and machining tools

The invention relates to a device for normal precision cutting/punching of blanks from a metal strip and for multi-stage machining of the blanks by means of cutting and machining tools, wherein the punched blanks are fed to the various machining tools on both sides of the metal strip, respectively by at least one rotary slide having transfer openings.

Such a device is basically already known from EP2842654B1 which has the title "Vorrichtung und Verfahren zum Transfer von Werkstücken in und aus einem Werkzeug".

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

The object of the invention is therefore to provide a new device for normal precision cutting/punching of blanks from a metal strip and for multi-stage machining of the blanks by means of cutting tools. cutting and machining, with which a greater number of cutting and machining tools can be used in the smallest possible space and, therefore, with a reduced construction size of the device.

The achievement of the objective results from the characteristics of claim 1 which says the following: Device for precision cutting / normal punching of blanks from a metal strip as well as for multi-stage machining of the blanks by means of cutting and machining tools, the punched blanks being fed to the various machining tools on both sides of the metal strip, respectively by at least one rotary slide having transfer openings, characterized in that , on both sides of At least two swivel sliders located at a distance and actuated are respectively arranged on the metal band, each having a plurality of transfer openings, two transfer openings of different swivel sliders having intersecting paths of movement, the intersection of the paths corresponding to move to trans position blank/machined workpiece difference.

The device according to the invention has the essential advantage that, not only due to the use of at least two driven rotary sliders located at a distance, but even more essentially due to the intersecting movement paths of the different transfer openings of the rotary sliders , a large number of cutting and machining tools can be positioned in a very small space, while at the same time not increasing the overall construction size of the device.

Advantageously, it is even possible to arrange a larger number of cutting and machining tools for normal punching or precision cutting in a smaller overall size of the device, to manufacture "two-dimensional" workpieces.

By "normal punching" is meant the manufacturing of components with the aid of a press and a cutting tool without using a counter force / retaining ring force.

The term "precision cutting", on the other hand, describes the manufacture of components with the aid of a press and a cutting tool using a counter force with or without a retaining ring, but with clamping force.

In the following, the tools are called punching tools, regardless of the machining procedure "normal punching" or "precision cutting".

In this application, by the term "two-dimensional" workpiece it is meant that the dimensions of the workpiece after machining are located within the contour of the rotary slide. By contrast, by the term "three-dimensional" workpiece is meant a workpiece, the dimensions of which extend at least partially outside the contour of a rotary slide.

In an advantageous embodiment of the invention, moreover, the at least two rotary sliders are arranged vertically movable in the device. As a result, it is particularly advantageously possible not only to machine blanks which are completely immersed in the contour of the rotary slides even after machining, but also to produce blanks which protrude significantly beyond the contour of the rotary slides.

Due to the vertical movement of the rotary slides, the field of use of the device according to the invention is considerably increased, which has a positive effect on the manufacturing costs of each individual workpiece.

Basically, it is also possible for three rotary sliders to cooperate on both sides of the metal belt, in which case the transfer openings of the rotary sliders also have intersecting movement paths. The advantage of this arrangement is that in this way even more cutting and machining tools can be arranged in the whole device in a relatively small space.

Further advantages of the invention result from the following dependent claims as well as from the description of various exemplary embodiments. They show:

Figure 1 a general schematic perspective view of a first embodiment of the device formed by an upper tool and a lower tool, Figure 2 a schematic perspective view of the upper tool,

Figure 3 a schematic perspective view of the lower tool including a metal band, Figure 4 a schematic representation of a first embodiment of the device with two rotary sliders,

FIGS. 5 to 6c a schematic representation of the first machining station of a blank in a second embodiment with two rotary slides in plan view from above and as a sectional representation,

FIGS. 7 to 20 schematic representations of the individual additional stations of the blank/partly machined workpiece in the second embodiment of the device with two rotary slides in top plan view,

Fig. 21 the representation of a finished "two-dimensional" workpiece which has been produced with a device according to Fig. 4,

Fig. 22 a schematic perspective view of a third embodiment of the device with three pivoting sliders and with a metal band,

FIGS. 23 to 40 show the individual positions of an exemplary blank/partly machined workpiece passing through a device with three rotary slides according to FIGS. 22 to 44 in top plan view,

Fig. 41 a schematic representation of a fourth embodiment of a device with two rotary slides that are movable vertically in different ways, and Figs. 42 to 44 the representation of finished "three-dimensional" workpieces that have been produced with a device according to figures 5 to 20a.

In the figures, the precision punching/normal punching device according to the invention is provided as a whole with the reference sign 10.

Figure 1 shows a general perspective view of a first embodiment of the device 10. The device 10 is composed of an upper tool 11 and a lower tool 12 that houses a metal band 13. The metal band 13 that moves in the direction of an arrow T has punched holes SL.

The upper tool 11 consists of a base plate 14 and an intermediate plate 15 arranged below. Between the base plate 14 and the intermediate plate 15, the upper tool 11 has guide columns 17 passing through the intermediate plate 15 to cooperate with guide bushings 30 of the lower tool 12.

Furthermore, Fig. 1 shows active elements F of the upper tool 11, which form at the ends the cutting and machining tools 21 which are shown in detail in Fig. 2.

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

Furthermore, two identically constructed die receptacles 31 are arranged on the base plate 29, only one die receptacle 31 being visible in FIG. 1. The second die receptacle 31 is rotated 180° about a center point (not shown) see black box BX2 in figure 3) on the opposite side of metal band 13.

The die receptacles 31 form a recess for the arrangement of a chute 32, through which the finished workpieces W are unloaded from the device 10.

In figure 2, the upper tool 11 is shown in detail in perspective from below. On the intermediate plate 15 guide plates 16 and 19 with active elements of the upper part are arranged. In addition, two band guide elements 18 are attached to the base plate 14, which serve to guide the metal band 13, not shown. The guide plate 19 has two first punching tools 20. These punching tools punching 20 serve to make the blanks R from the metal strip 13 shown in Figure 1.

Above the intermediate plate 15, the guide plates 16 and 19 to be moved with pressure bolts D (see Fig. 1) are provided with cutting and machining tools 21. The mentioned machining tools 21 are drilling tools 22, a stamping tool 23, second punching tools 24, third punching tools 25, edge stamping tools 26, letter stamping tools 27 and strippers 28.

On the other side of the metal band 13 a black box BX1 is represented. This black box BX1 is a placeholder for a second guide plate 16 which, starting from the aforementioned first guide plate 16 and the machining tools 21, is arranged rotated by 180° around a central axis, not shown, of the device 10 .

Figure 3 shows in detail the lower tool 12 in perspective from above. In figure 3 you can see the arrangement of the matrix housing 31.

A first rotary slider 33 and a second, larger rotary slider 34 are rotatably arranged in the die housing 31 via pivot units 36, 37 shown in Figure 4, the two rotary sliders 33, 34 operated jointly.

The rotary slides 33 and 34 each have transfer openings 35, which serve to receive the blanks R / the 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 354. to 35.7. The finished workpiece W is removed from the device 10 through the transfer opening 35.7 in the direction of the arrow C.

The transfer openings 35.1 to 35.7 of the rotary slides 33, 34 are provided with collets (not shown), which hold the blanks R or workpieces W firmly in the respective transfer opening 35.1 to 35.7 during transport within the device, so that they can be safely transported on the rotating slides 33, 34.

In the transfer openings 35.1 to 35.7, the partially machined workpieces W are shown as an example.

The partially machined workpieces W have already been machined by means of the tools 22 to 27. The machining of the partially machined workpieces W with the tools 22 to 27 is carried out respectively when the upper tool 11 and the lower tool 11 are brought together. 12. For this, the active elements F of the upper tool 11 (see FIG. 2) are each pressed with their free ends, embodied as tools 22 to 27, on the supported blanks R / partially machined workpieces W. on the ejection units 38, so that these are machined according to the tools 22 to 27.

Below the transfer opening 35.1 is the workpiece W22, which has been machined by means of the tool 22. Thus, below the transfer opening 35.2 is the partially machined workpiece W23, which has been machined. previously stamped by means of the stamping tools 23.

Below the transfer opening 35.3a, the partially machined workpiece W24, which has been produced by means of the second punching tool 24, is arranged.

Shown below the transfer opening 35.4 is the partially machined workpiece W25, which has been transformed from W24 into the partially machined workpiece W25 by means of the third punching tool 25.

Furthermore, below the transfer opening 35.5 is the partially machined workpiece W26, which has already been transformed by the edge stamping tool 26.

Below the transfer opening 35.6 is the workpiece W26 machined with the letter stamping tool 27.

Finally, the finished workpiece W27 is passed to the transfer opening 35.7, so that the finished workpiece W27 is evacuated from the device 10 by means of the ejector 28 shown in Fig. 2. Not shown, in the In the die holder 31, ejector units 38.1 to 38.8 are arranged, on which the blank R / partially machined workpiece is arranged during machining. W22 to W27.

FIG. 4 shows a schematic representation of a first embodiment of the device 10 with the first rotary slider 33 and the second rotary slider 34, which are actuated together and always move within a common plane.

For ease, the upper tool 11 and the lower tool 12 are not shown in Figure 4. The first rotary slider 33 is fixed on the pivot unit 36 and the second rotary slider 34 is fixed on the pivot unit 37. The first rotary slider 33 forms the transfer openings 35.1 to 35.

3 and the second rotary slider 34 forms the transfer openings 35. 4 to 35.7.

With the help of the dashed line L, 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 schematically represented. (see figure 20).

Figure 21 shows the finished "two-dimensional" workpiece W27, which has been punched, stamped, punched twice, edge stamped from below, and letter stamped from above.

A second embodiment of the device 10 is shown in FIGS. 5 to 20. For ease of reference, the motion sequence of a single blank R / workpiece W is merely schematically represented, while in reality during operation of the device 10, all transfer openings 35.1 to 35.7 of the rotary slides 33, 34 are occupied by a blank R / partially machined workpiece W, so that a total of 14 can always be produced simultaneously. blanks / partially machined workpieces W.

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

In figures 5 and 5a, the rotary sliders 33, 34 are in a starting position^. The blank R has already been punched out of the metal strip 13 and is located in an ejection unit 38.1 in a plane H-1, as shown in Fig. 5a. The metal band 13 and the rotary sliders 33, 34 are arranged in a plane H0.

Figure 5b shows that the blank R is still located on the ejection unit 38.1 in a plane H-1. The metal strip 13, on the other hand, has been displaced towards the plane H1, so that between the blank R and the metal strip 13 a free space results. The rotary sliders 33 and 34 remain in the starting position A1 in the plane H0.

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

Figures 6 to 6c show the collection position A2. The rotary sliders 33, 34 continue to be arranged in the plane H0 of figures 6 and 6a. However, the rotary slider 33 has now been moved in the direction P1 and is located on the blank R which is still located on the ejection unit 38.1 in the plane H-1. Parallel to the rotational movement of the first rotary slider 33, the second rotary slider 34 has been moved counterclockwise, in the direction P2, so that the first rotary slider 33 has sufficient free space for movement. opposite in the P1 direction.

Next, as shown in Fig. 6b, the ejection unit 38.1 has been moved to the plane H0, so that the blank R is now also located in the plane H0. The transfer of the blank R from the ejection unit 38.1 to the transfer opening 35.1 of the rotary slide 33 is to be seen in conjunction with figures 6b and 6c. The blank R is transferred from the ejection unit 38.1, for example by means of a spring element (not shown), to the transfer opening 35.1 of the rotary slide 33, which likewise lies in the plane H0.

After the transfer to the transfer opening 35.1, in which the blank R is now clamped, the rotary slide 33 moves vertically to the plane H1 and is moved from the pick-up position A2 to a machining position where the blank R is now passed to the next ejection unit 38.2 in the plane Ho, as shown in Fig. 7, and becomes the workpiece W22. The sequence of machining the blank R or the partially machined workpiece W22 to the workpiece W27 in Fig. 19, by changing the starting position A1 to the pick-up position A2 of the metal band 13, of the rotary sliders 33, 34 and of the workpiece W, is made according to the previously described sequence according to figures 5 to 6c.

Figure 11 also shows the transfer of workpiece W24 from rotary slide 33 to rotary slide 34. Transfer openings 35.3 of rotary slide 33 and transfer opening 35.4 of rotary slide 34 have motion paths B that intersect The respective movement paths are shown with the aid of the dotted line B. In this transfer position, the completely overlapping movement paths B, the transfer openings 35.3, intersect. of the rotary slide 33 and the transfer opening 35.4.3 of the rotary slide 34. This means that the machined workpiece W24 has been deposited from the transfer opening 35.3 of the first rotary slide 33 to the transfer position on a ejection unit not shown.

Once the rotary slider 33 has moved away from this transfer position, the second rotary slider 34 with the transfer opening 35.4 is moved into the transfer position to receive the partially machined workpiece W24 with the transfer opening 35.4 from the ejection unit described above to further transport the workpiece W24 to the next machining position.

Finally, figure 20 shows the ejection of the finished workpiece W27 from the device 10 with the help of the ejector 28 not shown, in the direction C.

This special arrangement and the joint action of the rotary slides 33, 34 allows to arrange and use a greater number of cutting and machining tools in the smallest possible space and, therefore, with a reduced construction size of the device.

Furthermore, due to the vertical mobility of the rotary slides 33, 34, it is possible to manufacture "three-dimensional" workpieces W which can be partially machined and transported outside the contour of the respective rotary slides 33, 34. In figures 42 to 44 shows exemplary workpieces W in detail.

FIG. 22 shows a schematic representation of a third embodiment of the device 10 with three rotary sliders 39, 40, 41 that are actuated together and are always arranged in a common plane. The rotary sliders 39, 40, 41 are arranged on pivot units (not shown), which respectively allow the rotary movement of the rotary sliders 39, 40 and 41.

The rotary slides 39, 40 and 41 are respectively 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 slider 41 forms four transfer openings 42.5 to 42.8.

The dashed line L schematically shows the movement path 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 with the help of the arrow c.

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

In figure 23, the starting position A1 of the respective rotary sliders 39, 40 and 41 with respect to the metal strip 13 is shown.

In FIGS. 24 to 40, the respective direction of rotation of the rotary sliders 39, 40 and 41 is shown with the aid of direction arrows P1 to P3.

Figures 23 to 40 show the path of movement of the blank R / partially machined workpiece from the metal belt 13 to the ejection of the device 10 by means of the rotary sliders 39, 40 and 41. In each intermediate position, the blank R / partially machined workpiece W is machined by means of eight different tools. For simplicity, in all FIGS. 23 to 40 a blank R / a workpiece W is represented as a blank R without differentiation, although this too has been machined step by step by tools and has been transformed into a workpiece. workpiece W. Figs. 27 and 31 show the respective transfer positions of the workpiece blank R / partially machined workpieces W to the respective rotary slide 40, 41 below. Fig. 27 shows in detail the transfer of the partially machined workpiece W from the first rotary slide 39 to the second rotary slide 40. The respective movement paths are represented with the help of the dotted line B. In this position of completely overlapping paths of movement, the transfer openings 42.2 of the rotary slide 39 and the transfer opening 42.3 of the Rotary slider 40. This means that the blank R / the machined workpiece W has been deposited from the transfer opening 42.2 of the first rotary slider 39 into the transfer position on a not shown ejection unit.

Once the rotary slider 39 has moved away from this transfer position, the second rotary slider 40 with the transfer opening 42.3 has been moved into the transfer position in order to receive the blank / partially machined workpiece W with the transfer opening 42.3 from the ejection unit described above to further transport the workpiece W to the next machining position.

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

In Fig. 40, the finished workpiece W is ejected from the third rotary slide 41 by means of the ejector 28 shown in Fig. 2.

Fig. 41 shows a schematic representation of a fourth embodiment of the device 10 with two pivoting sliders 43, 44 vertically movable in different ways. The rotary sliders 43, 44 form the transfer openings 45.1 to 45.7.

Fig. 41 shows that the respective rotary sliders 43, 44 are arranged in different planes. The two rotary sliders 43, 44 are made rotatable by means of a pivot unit (not shown). Direction arrows P4 and P5 show the respective directions of movement of the rotary sliders 43, 44, an arrow V indicating the direction of movement of the metal belt 13.

Of course, it is also possible that, for example, the three rotary sliders 39, 40, 41 according to FIGS. 22 to 40 are arranged vertically movable in different ways.

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

In total, the device 10 according to the invention for precision cutting / normal punching allows to arrange a large number of cutting and machining tools 21 with the same size of construction space. In addition, a universal use for the manufacture of "two-dimensional" and three-dimensional workpieces W is possible.

List of reference signs

10. Device

11. Upper tool

12. Lower tool

13. Metallic band

14. Base plate

15. Intermediate plate

16. Guide plate with active elements of the upper part

17. Guide column

18. Band guide element

19. Guide plate with active elements of the upper part

20. First punch tool

21. Machining tool

22. Drill tool

23. Stamping tool

24. Second punch tool

25. Third Punch Tool

26. Edge stamping tool

27. Letter Stamping Tool

28. Ejector

29. Base plate

30. Guide bushings

31. Housing of matrix with active elements of the lower part

32. Ramp

33. First rotary slider of the first and second embodiments

34. Second rotary slider of the first and second embodiments

35.1 to 35.7 Transfer opening of rotary slides 33, 34

36. 33 pivot unit

37. 34 pivot unit

38.1 to 38.7 Ejection unit

39. First rotary slider according to the third embodiment

40. Second rotary slide according to the third embodiment

41. Third rotary slide according to the third embodiment

42.1 to 42.8 Transfer opening of rotary slides 39 to 41

43. First rotary slide according to the fourth embodiment

44. Second rotary slide according to the fourth embodiment

45.1 to 45.7 Transfer openings of rotary slides 43, 44

A1 = starting position

A2 = Pick up position

B = Motion Path

BX1 = Black box at 11

BX2 = Black box at 12

C = Evacuation transport direction arrow

D = Pressure bolt

F = Active element of the upper part

L = Motion Path

H-1 = Drawing of ejection unit 38, blank R / partially machined workpieces W22 to W27

H0 = Drawing of ejection unit 38, rotary slide 33, 34, metal band 13, blank R / partially machined workpieces W22 to W27

H1 = Plane of the rotary slides 33, 34 and of the metal band 13

H2 = Plane of metal band 13

O = Top side

P1 = Direction arrow of 33

P2 = Direction Arrow 34

P3 = Direction arrow of 39

P4 = Direction Arrow 43

P5 = Direction Arrow 44

R= blank

SL= Punched hole

T = Direction of movement of 13

V = Movement Arrow

W = work piece

W22 = drilled workpiece

W23= Stamped work piece

W24= punched work piece

W25= Work piece punched again

W26 = Workpiece with stamped edges W27 = Finished workpiece with stamped letters

Claims (9)

1. Device (10) for precision cutting / normal punching of blanks (R) from a metal strip (13) as well as for multi-stage machining of the blanks (R) by means of tools cutting and machining (21), the punched blanks (R) being fed to the different machining tools (21) on both sides of the metal strip (13), respectively by at least one rotary slider (33, 34 ) that has transfer openings (35), characterized in that , on both sides of the metal strip (13), at least two rotating sliders (33, 34) located at a distance and actuated, respectively, are respectively arranged with a plurality of openings of transfer (35), having two transfer openings (35) of different rotary slides (33, 34) intersecting paths of movement (B), the intersection of the paths of movement (B) corresponding to the transfer position d e the blank (R) / (workpiece W) machined. Device (10) according to claim 1, characterized in that the at least two rotary sliders (33, 34; 43, 44) are arranged vertically movable in the device. Device (10) according to claim 1 or 2, characterized in that the at least two rotary sliders (33, 34; 43, 44) are driven in opposite directions. Device (10) according to one of the preceding claims, characterized in that three rotary sliders (39, 40, 41) cooperate with each other adjacently on both sides of the metal band (13). 5. Apparatus (10) according to one of the preceding claims, characterized in that the adjacent rotary sliders (33, 34; 39, 40, 41; 43, 44), arranged on both sides of the metal band (13), have coupled drives forcefully with each other. Device (10) according to one of the preceding claims, characterized in that the respective adjacent rotary sliders (33, 34; 39, 40, 41; 43, 44) form geometric shapes that differ from each other and partially engage with each other in the rotary movement. Device (10) according to one of the preceding claims, characterized in that respectively two of the rotary sliders (33, 34; 39, 40, 41; 43, 44) arranged on both sides of the metal band (13) form geometric shapes identical. Device (10) according to one of the preceding claims, characterized in that one of the rotary sliders (34, 41, 43) is approximately trapezoidal in shape. Device (10) according to one of the preceding claims, characterized in that one of the rotary sliders (33, 39, 40, 43) is approximately triangular in shape.