HYDRAULIC PUNCH DEVICE

Abstract

The invention relates to a hydraulic punch device with a hydraulically driven punch carrier for releasably seating a punch and a die with a die opening adapted to the punch cross-section of the punch. To provide a punch device that makes it possible to reliably produce differently shaped holes, the punch has a punch cross-section different from a circular cross-section.

Claims

1. A hydraulic punch device comprising: a hydraulically driven punch carrier for releasably seating a punch, and a die with a die opening adapted to the punch cross-section of the punch, wherein the punch has a punch cross-section different from a circular cross-section.

2. The hydraulic punch device according to claim 1, characterized by a punch guide unit with a guide element that at least sectionally abuts the outside of the punch such that the punch is secured against rotation.

3. The hydraulic punch device according to claim 1, wherein the guide element is mounted movably in the adjusting direction of the punch on a seating unit of the punch guide unit.

4. The hydraulic punch device according to claim 1, wherein the guide element is biased toward the punch carrier.

5. The hydraulic punch device according to claim 1 claims, wherein the seating unit and a die carrier are designed as a single-part basic carrier.

6. The hydraulic punch device according to claim 1, wherein the seating unit has a seating opening for exchangeably arranging the guide element, and/or the die carrier has a die seat for exchangeably arranging a die.

7. The hydraulic punch device according to claim 1, wherein the basic carrier is designed to releasably connect to a punch yoke.

8. The hydraulic punch device according to claim 1, wherein the die carrier is designed to contact the punch yoke on its side opposite the die seat.

9. The hydraulic punch device according to claim 1, wherein the basic carrier has a contact section for arranging a workpiece in the region between the seating unit and the die carrier.

10. The hydraulic punch device according to claim 2, wherein the guide element is mounted movably in the adjusting direction of the punch on a seating unit of the punch guide unit.

11. The hydraulic punch device according to claim 4, wherein the guide element is spring-biased.

Description

[0028] An exemplary embodiment of the invention will be explained below with reference to the drawings. In the drawings:

[0029] FIG. 1 shows a side view of an embodiment of a hydraulic punch device with a hydraulic unit and a punch yoke;

[0030] FIG. 2 shows a perspective view of the punch yoke region of the punch device from FIG. 1;

[0031] FIG. 3 shows an exploded view of a punch guide unit from FIG. 1;

[0032] FIG. 4 shows a side view of the yoke region of the punch device from FIG. 1, partially in a section in a home position of the punch, and

[0033] FIG. 5 shows a side view of the yoke region of the punch device from FIG. 1, partially in a section in an extended position of the punch.

[0034] The punch device 1 shown in a side view in FIG. 1 has a hydraulic unit 15 as well as a punch yoke 13 connected to the hydraulic unit 15. A piston of the hydraulic unit 15 (not shown) makes it possible to adjust toward a die 4 a punch carrier 3 for punching in the direction of the longitudinal axis of a punch 2 arranged on the punch carrier 3. By means of the punch device 1, it is accordingly possible to provide workpieces arrangeable in the region between the punch 2 and the die 4, such as pieces of sheet metal, with holes. The punch 2 is arranged with a connecting pin 21 in a punch seat 22 of the punch carrier 3 (see FIG. 1 to 3).

[0035] The punch carrier 3 is designed to releasably seat the punch 2, wherein it does not have a circular cross-section but rather a punch cross-section that can produce a slot. In this context, the punch 2 is additionally guided on its perimeter by a guide element 7 of a punch guide unit 6, wherein a guide section 18 of the guide element 7 abuts an outer surface of the punch 2. The guide element 7 accordingly prevents the punch 2 from twisting during the punching process and ensures an unchanging alignment of the punch 2 relative to the punch yoke 13.

[0036] For its part, the guide element 7 is arranged movably in the direction of the longitudinal axis of the punch 2 on a seating unit 8, wherein the seating unit 8 has a seating opening 11 for this purpose that is adapted to a guide element 20 of the guide element 7. In the event that the punch 2 moves longitudinally during a punching process starting from the home position shown in FIG. 4 to the end position shown in FIG. 5, a shoulder of the punch 2 running in the region of the punch carrier 3 comes to rest on a face of the guide element 7 facing the punch carrier 3 and then moves it in the seating opening 11 toward a die carrier 9 that has a die seat 12 for arranging a die 4 that is adapted to the punch 2 and has a die opening 5 corresponding to the punch cross-section.

[0037] In the end position shown in FIG. 5, the punch 2 extends with its punch cross-section through the die opening 5 of the die 4. When the punch 2 returns toward the home position shown in FIG. 4, the guide element 7 also reaches its home position, wherein it comes to rest in the home position on a cover plate 19 screwed on in the region of the seating unit 8 viewed in the direction toward the punch carrier 3. Given the positional fixation of the guide element 7 relative to the punch 2, it also serves as a scraper during the return movement.

[0038] The seating unit 8 and the die carrier 9 of the punch guide unit 6 are a component of a one-piece basic carrier 10 that has an elongated contact section 14 for arranging a workpiece in the region between the die 4 and the punch 2. In the region of die carrier 9, the basic carrier 10 is screwed to an end of the punch yoke 13 opposite the punch carrier 3. The position of the basic carrier 10 of the punch guide unit 6 on the punch yoke 13 is additionally fixed by two securing legs 17 adjoining the outside of the punch yoke 13 and screwed thereto. On their ends opposite the punch yoke, the securing legs 17 are also screwed to a retaining bar 16. Together with a section of the seating unit 8 and sections of the securing legs 17, this forms an opening for the guide element 7.

[0039] In this case, the guide element 7 is biased toward the punch carrier 3 by spring elements 23, which contact the cover plate 19 at one end and the guide element 7 at the other end.

REFERENCE SIGN LIST

[0040] 1 Punch device [0041] 2 Punch [0042] 3 Punch carrier [0043] 4 Die [0044] 5 Die opening [0045] 6 Punch guide unit [0046] 7 Guide element [0047] 8 Seating unit [0048] 9 Die carrier [0049] 10 Basic carrier [0050] 11 Seating opening [0051] 12 Die seat [0052] 13 Punch yoke [0053] 14 Contact section [0054] 15 Hydraulic unit [0055] 16 Retaining bar [0056] 17 Securing leg [0057] 18 Guide section [0058] 19 Cover plate [0059] 20 Guide element [0060] 21 Connecting pin [0061] 22 Punch seat [0062] 23 Spring element