Hydraulic punch machine, and punch carrier for a punch machine

Abstract

The invention relates to a punch carrier for a punch machine comprising a piston unit exchangeably arranged on the punch machine, and a punch holder arranged on the piston unit for exchangeably arranging a punch. Furthermore, the invention relates to a hydraulic punch machine comprising: a hydraulically driven punch carrier and a die adapted to a punch. In order to provide a punch machine as well as a punch carrier for a punch machine that reliably allows an easy exchange of the punch to adapt to changing processing requirements, the punch holder has a punch seat transversal to the direction of the longitudinal axis of the piston unit, and a stripper that can be attached to the punch machine and has a passage for the punch, wherein the stripper is designed such that it fixes the punch in an operating position in the punch seat. Furthermore, it is provided that the punch carrier is designed according to one or more of claims 1 to 5.

Claims

1. A punch carrier for a punch machine comprising: a piston unit exchangeably arranged on the punch machine, and a punch holder arranged on the piston unit for exchangeably arranging a punch, wherein the punch holder has a punch seat transversal to the direction of the longitudinal axis of the piston unit, and a stripper that can be attached to the punch machine and has a passage for the punch, wherein the stripper is designed such that it fixes the punch in an operating position in the punch seat.

2. The punch carrier according to claim 1, wherein the punch seat is formed by an elongated slot with a C-shaped cross-section that is closed at one end and open at the other end.

3. The punch carrier according to claim 1, wherein the punch seat has a magnetic retaining element in a region of a closed end of the punch seat.

4. The punch carrier according to claim 1, wherein the stripper is designed such that it can be locked in the operating position on the punch machine.

5. The punch carrier according to claim 1, wherein the stripper has an anti-friction coating in a contact region with the punch.

6. A hydraulic punch machine comprising: a hydraulically driven punch carrier and a die adapted to a punch, wherein the punch carrier is designed according to claim 1.

7. A punch carrier for a punch machine comprising: a piston unit exchangeably arranged on the punch machine, and a punch holder arranged on the piston unit for exchangeably arranging a punch, the punch holder having a punch seat transversal to the direction of the longitudinal axis of the piston unit, the punch seat is formed by an elongated slot with a C-shaped cross-section that is closed at one end and open at the other and the punch seat has a magnetic retaining element in a region of the closed end of the punch seat, and a stripper for attachment to the punch machine, wherein the stripper has a passage for the punch, and the stripper is designed such that it fixes the punch in an operating position in the punch seat.

8. The punch carrier according to claim 7, wherein the stripper is designed such that it can be locked in the operating position on the punch machine.

9. The punch carrier according to claim 7, wherein the stripper has an anti-friction coating in a contact region with the punch.

10. A hydraulic punch machine comprising: a hydraulically driven punch carrier and a die adapted to a punch, wherein the punch carrier is designed according to claim 7.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING(S)

(1) An exemplary embodiment of the invention is explained below with reference to the drawings. In the drawings:

(2) FIG. 1 shows a perspective view of a punch carrier in an exploded view;

(3) FIG. 2a shows a side view of a punch machine with a mounted punch carrier.

(4) FIG. 2b shows a side view of the punch machine from FIG. 1 with a dismounted stripper;

(5) FIG. 2c shows a side view of the punch carrier from FIG. 1 with a dismounted punch;

(6) FIG. 3a shows a side view of the punch machine from FIG. 1 with a punch to be mounted;

(7) FIG. 3b shows a side view of the punch machine from FIG. 1 with a mounted punch and stripper to be mounted; and

(8) FIG. 3c shows a side view of the punch machine from FIG. 1 with a mounted punch carrier.

DETAILED DESCRIPTION OF THE INVENTION

(9) FIG. 1 shows a perspective view of an embodiment of a punch carrier 1 with a piston unit 2 and a stripper 6. The piston unit 2 is generally exchangeably arranged on a punch machine 8 shown in FIGS. 2a to 2c and 3a to 3c so as to be movable in the direction of its longitudinal axis. To accommodate an exchangeable punch 4 on the punch carrier 1, the piston unit 2 has a punch holder 3 with a punch seat 5 which is formed by an elongated slot running transversally to the direction of the longitudinal axis of the piston unit 2 and having a C-shaped cross-section.

(10) A disk-shaped main body 12 of the punch 4 can be inserted up to the closed end of the elongated slot through an open end of the elongated slot in the region of the peripheral surface of the piston unit 2. The diameter and thickness of the main body 12 is adapted to the width and height of the elongated slot so that the C-shaped sections ensure a locking of the punch 4 in the direction of the longitudinal axis of the piston unit 2.

(11) Proceeding from the main body 12, the punch 4 extends with a section that is tapered in comparison with the main body 12, between the C-shaped sections toward the stripper 6 which can be locked on the punch machine 8. The stripper 6 serves to secure the position of the punch 4 in the operating position in which the punch 4 abuts the closed end of the elongated slot by means of the main body 12. A passage 7 in the stripper 6 ensures a passage of the punch 4 when the piston unit 2 is displaced by the punch machine 8 so that corresponding punching processes can be performed by the punch 4.

(12) FIGS. 2a to 2c depict the easy dismounting of a punch 4 from the clamp 10 of the punch machine 8. Starting from the position of the mounted punch carrier 1 depicted in FIG. 2a with the punch 4 installed thereupon, the stripper 6 is removed from the punch machine 8 for dismounting so that the piston unit 2 is accessible that can be adjusted by the drive unit 11 of the punch machine 8 in the direction of the longitudinal axis of the piston unit 2 toward the die 9. After removing the stripper 6, the punch 4 can be removed as shown in FIG. 2c.

(13) After removing the punch 4, another punch 4 can be inserted in the punch seat 5 of the punch holder 3 as shown in FIGS. 3a to 3c, and then fixed in the operating position by mounting the stripper 6. A punch process can be carried out again in the operating position shown in FIG. 3c, wherein pieces of sheet metal (not shown) are to be arranged between the stripper 6 and the die 9. By actuating the drive unit 11 of the punch machine 8, the punch 4 is moved through the passage 7 in the stripper 6 toward the die 9, wherein pieces of sheet metal (not shown) located there between are punched corresponding to the diameter of the punch 4.

REFERENCE NUMBER LIST

(14) 1 Punch carrier 2 Piston unit 3 Punch holder 4 Punch 5 Punch seat 6 Stripper 7 Passage 8 Punch machine 9 Die 10 Clamp 11 Drive unit 12 Main body