Processing unit and machine tool for the punching processing of workpieces

Patent metadata

Field	Value
Publication number	US-10543522-B2
Application number	US-201715460841-A
Country	US
Kind code	B2
Filing date	Mar 16, 2017
Priority date	Mar 17, 2016
Publication date	Jan 28, 2020
Grant date	Jan 28, 2020

Abstract

A processing unit of a machine tool for the punching processing of workpieces, in particular metal sheets, has a punching tool carrier configured to receive a punching tool and a stripper carrier for a stripper. The punching tool carrier can be moved by a punch drive along a stroke axis by a transverse drive element being driven by a punch drive motor relative to the punching tool carrier with a transverse drive movement along a transverse movement axis which extends in the transverse direction of the stroke axis. The stripper carrier can be moved along the stroke axis by a stripper drive, and the transverse drive element of the punch drive during the transverse drive movement can be moved relative to the stripper carrier along the transverse movement axis and the punching tool carrier and the stripper carrier can be moved relative to each other along the stroke axis.

First claim

What is claimed is:

1. A processing unit of a machine tool for punching processing of workpieces comprising:
a first carrier structure;
a punching tool carrier configured to receive a punching tool;
a punch drive that has a first transverse drive element and a second transverse drive element, the first and the second transverse drive elements of the punch drive being configured to move the punching tool carrier along a stroke axis,
wherein the punch drive comprises a punch drive motor configured to move the first and the second transverse drive elements of the punch drive in opposite directions relative to the punching tool carrier, the first and the second transverse drive elements of the punch drive thus performing a transverse drive movement along a transverse movement axis, the transverse movement axis being an axis that extends in a transverse direction of the stroke axis,
wherein each of the first and the second transverse drive elements of the punch drive forms a punch-drive-motor-side gear element, wherein a wedge gear mechanism includes the punch-drive-motor-side gear elements, the wedge gear mechanism being between the punch drive motor and the punching tool carrier, and
wherein with the punching tool carrier being driven along the stroke axis, the first transverse drive element of the punch drive cooperates with a first punching-tool-carrier-side gear element of the wedge gear mechanism and the second transverse drive element of the punch drive cooperates with a second punching-tool-carrier-side gear element of the wedge gear mechanism;
a stripper carrier configured to hold a stripper for the punching tool received by the punching tool carrier, wherein the punching tool carrier and the stripper carrier can be moved relative to each other along the stroke axis; and
a stripper drive configured to move the stripper carrier along the stroke axis and comprising a stripper drive motor;
wherein the first and the second transverse drive elements of the punch drive are movable relative to the stripper carrier during the transverse drive movement along the transverse movement axis,
wherein the first and the second transverse drive elements of the punch drive are movably guided in a direction of the transverse movement axis relative to the stripper carrier by the first and the second transverse drive elements of the punch drive being guided along the transverse movement axis on a second carrier structure, which second carrier structure is provided for the stripper carrier and for the stripper drive motor and supports the stripper carrier and the stripper drive motor in a direction of the stroke axis,
wherein the stripper carrier is movably supported by the second carrier structure for the stripper carrier and for the stripper drive motor in the direction of the stroke axis,
wherein the stripper carrier is connected to the stripper drive motor by a drive rod that passes the punching tool carrier along the stroke axis, and wherein the stripper carrier is arranged at a side of the drive rod remote from the stripper drive motor and is supported on the punching tool carrier by the drive rod in the direction of the transverse movement axis and movably guided on the punching tool carrier along the stroke axis, and
wherein the first and the second transverse drive elements of the punch drive are supported on the first carrier structure in the direction of the stroke axis and wherein the first and the second transverse drive elements support the second carrier structure for the stripper carrier and for the stripper drive motor in the direction of the stroke axis, wherein the first and the second transverse drive elements of the punch drive support the stripper carrier and the stripper drive motor in the direction of the stroke axis.

2. The processing unit according to claim 1 , wherein the stripper carrier is supported on the punching tool carrier in the direction of the transverse movement axis and is movably guided on the punching tool carrier along the stroke axis.

3. The processing unit according to claim 1 , wherein each of the first and the second punching-tool-carrier-side gear elements of the wedge gear mechanism is a gear wedge having a wedge face, wherein the wedge faces of the first and the second punching-tool-carrier-side gear elements are inclined in opposite directions with respect to the transverse movement axis.

4. The processing unit according to claim 1 , wherein the first and the second transverse drive elements of the punch drive further support the punching tool carrier in the direction of the stroke axis.

5. The processing unit according to claim 1 , wherein the stripper drive motor is a piston/cylinder motor.

6. The processing unit according to claim 1 , wherein each of the first and the second transverse drive elements of the punch drive as well as each of the first and the second punching-tool-carrier-side gear elements of the wedge gear mechanism is a gear wedge having a wedge face, wherein the wedge faces of the first and the second transverse drive elements of the punch drive are inclined in opposite directions with respect to the transverse movement axis, and wherein the wedge faces of the first and the second punching-tool-carrier-side gear elements of the wedge gear mechanism are inclined in opposite directions with respect to the transverse movement axis.

7. The processing unit according to claim 1 , wherein the stripper drive motor is a piston/cylinder motor, wherein the drive rod is a piston rod fitted to a piston of the piston/cylinder motor, and wherein the drive rod has an end remote from the piston/cylinder motor to which end the stripper carrier is connected.

8. The processing unit according to claim 7 , wherein the drive rod is a first drive rod and the stripper carrier is further connected to the stripper drive motor of the stripper drive by a second drive rod which is offset with respect to the first drive rod along the transverse movement axis, and which second drive rod passes the punching tool carrier along the stroke axis, wherein the stripper carrier is arranged at a side of the second drive rod remote from the stripper drive motor and is supported on the punching tool carrier by the second drive rod in the direction of the transverse movement axis and movably guided along the stroke axis.

9. The processing unit according to claim 8 , wherein the stripper drive motor comprises two motor units and one motor unit of the stripper drive motor is associated with the first drive rod and the other motor unit of the stripper drive motor is associated with the second drive rod.

10. The processing unit according to claim 8 , wherein the second drive rod passing the punching tool carrier extends through the punching tool carrier.

11. The processing unit according to claim 1 , wherein the drive rod passing the punching tool carrier extends through the punching tool carrier.

12. The processing unit according to claim 1 , wherein each of the first and the second transverse drive elements of the punch drive is a gear wedge having a wedge face, wherein the wedge faces of the first and the second transverse drive elements of the punch drive are inclined in opposite directions with respect to the transverse movement axis.

13. A machine tool for punching processing of workpieces, comprising a machine frame configured to support a workpiece, and a processing unit for punching processing of the workpiece, the processing unit comprising:
a first carrier structure;
a punching tool carrier configured to receive a punching tool;
a punch drive that has a first transverse drive element and a second transverse drive element, the first and the sec

Assignees

• Trumpf Werkzeugmaschinen Gmbh Co Kg

Inventors

• Etzel Kai
• Traenklein Dennis

Classifications

• B21D45/06

  Stripping-off devices · CPC title

• B21D45/08

  interrelated with motion of tool · CPC title

• B21D28/00 Primary

  Shaping by press-cutting; Perforating · CPC title

• B21D45/006 Primary

  Stripping-off devices · CPC title

• B30B1/40

  by wedge means · CPC title