Systems for Processing Workpieces and Mechanical Arrangements for Moving Workpieces and/or Workpiece Remnants

• US 20090116939A1
• Filed: 10/27/2008
• Published: 05/07/2009
• Est. Priority Date: 04/29/2006
• Status: Active Grant

• Current Assignee: Trumpf Laser- und Systemtechnik GmbH (TRUMPF SE + Co. KG)
• Original Assignee: Trumpf Laser- und Systemtechnik GmbH (TRUMPF SE + Co. KG)
• Inventors: Weber, Joerg, Kurrer, Winfried
• Granted Patent: US 7,743,910 B2
• Time in Patent Office: Days
• US Class Current: 414/222.110
• CPC Class Codes: B23K 37/0461 Welding tables
• CPC Class Codes: B23Q 16/001 Stops, cams, or holders therefor
• CPC Class Codes: B23Q 7/1436 using self-propelled work holders
• CPC Class Codes: F16G 13/20 stiff; Push-pull chains

Abstract

A mechanical arrangement for moving workpieces and/or processing remnants from processing of a workpiece comprises a load carrier and a load carrier drive. Part of the load carrier drive is formed by a rigid chain which is acted upon by a chain driving wheel supported on the load carrier. Owing to that action, the chain driving wheel takes the load carrier with it to a target position. In the process, the chain driving wheel moves together with the load carrier relative to a chain abutment against which the rigid chain is braced. Systems for processing workpieces are provided, which make use of a mechanical arrangement of the above-mentioned kind.

Claims

1. A mechanical arrangement for moving workpieces and/or processing remnants from processing of a workpiece, the mechanical arrangement comprising:

a load carrier which can be loaded with a workpiece and/or with a processing remnant and

a load carrier drive by means of which the load carrier is movable into a target position, the load carrier drive including

a drive motor,

a rigid drive chain, and

a chain driving wheel, supported on the load carrier and drivingly connected with the drive motor, which, when driven by the drive motor, acts on the rigid drive chain,

the rigid drive chain being configured to convert a driving movement of the chain driving wheel into a movement of the load carrier into the target position, wherein the rigid driving chain is braced against a chain abutment, relative to which the chain driving wheel moves together with the load carrier.

2. A mechanical arrangement according to claim 1, further comprising a chain magazine configured to take up a chain reserve length of the rigid drive chain on the side of the site of action of the chain driving wheel remote from the chain abutment, the chain magazine being movable together with the load carrier as the load carrier moves into the target position.

3. A mechanical arrangement according to claim 1, wherein the drive motor is movable together with the load carrier as the load carrier moves into the target position.

4. A mechanical arrangement according to claim 2, wherein the chain magazine is provided on the load carrier.

5. A mechanical arrangement according to claim 1, further comprising a chain rest, relative to which the load carrier is movable during movement into the target position and on which a pushed length of the rigid chain, provided between the chain abutment and the site of action of the chain driving wheel, can be laid down or taken up during movement of the load carrier.

6. A mechanical arrangement according to claim 5, further comprising a drive housing, surrounding the chain driving wheel, which opens towards the chain rest the opening of the drive housing including a an entry and exit guide for the rigid chain.

7. A mechanical arrangement according to claim 6, wherein the entry and exit guide includes a surface that is inclined with respect to the chain rest.

8. A mechanical arrangement according to claim 5, wherein the chain rest comprises a rest element provided with a level support surface for the rigid chain.

9. A mechanical arrangement according to claim 5, wherein the chain rest includes at least one rest protrusion, and the rigid drive chain includes chain link plates which extend in the longitudinal direction of the rigid drive chain and which are spaced apart in the transverse direction of the chain, the rest protrusion being received between the chain link plates as the rigid drive chain is laid down on the chain rest.

10. A mechanical arrangement according to claim 1, wherein the rigid chain includes chain links, each chain link comprising chain link plates extending in the longitudinal direction of the chain and spaced apart in the direction transverse thereto, and link pins extending in the transverse direction of the chain and passing through the chain link plates, wherein the rigid chain is acted upon by the chain driving wheel via the link pins.

11. A mechanical arrangement according to claim 10, wherein the chain driving wheel comprises two sprocket wheels, arranged to act on axially spaced locations of each link pin.

12. A mechanical arrangement according to claim 3, wherein the drive motor is mounted on the load carrier.

13. A mechanical arrangement according to claim 5, wherein the chain rest is disposed substantially flush with a surface that supports the load carrier.

14. A mechanical arrangement according to claim 1, comprising a plurality of load carriers and an associated plurality of load carrier drives.

15. A system for processing workpieces, the system comprising:

a processing unit; and

a mechanical arrangement comprising;

a load carrier which can be loaded with a workpiece and/or with a processing remnant and

a load carrier drive by means of which the load carrier is movable into a target position, the load carrier drive including

a drive motor,

a rigid drive chain,

a chain driving wheel, supported on the load carrier and drivingly connected with the drive motor, which, when driven by the drive motor, acts on the rigid drive chain,

wherein the rigid drive chain is braced against a chain abutment and converts a driving movement of the chain driving wheel into a movement of the load carrier into the target position, the chain driving wheel together with the load carrier moving relative to the chain abutment.

16. A system according to claim 15, wherein a processing position of the load carrier at the processing unit is provided as a target position of the load carrier.

17. A system according to claim 16, wherein the chain abutment is arranged close to the processing position of the load carrier in such a manner that a pushed length of the rigid chain between the chain abutment and the site of action of the chain driving wheel when the load carrier is in the processing position is as small as possible.

18. A system according to claim 15, comprising a pair of mechanical arrangements.

19. A system according to claim 18, comprising a plurality of pairs of mechanical arrangements.

20. A system according to claim 19, wherein at least two of the pairs of mechanical arrangements are configured to move orthogonally with respect to each other.

21. A system according to claim 20 wherein at least one pair of mechanical arrangements is configured so that the mechanical arrangements of that pair can move relative to each other.

22. A system for processing workpieces, the system comprising:

a processing unit; and

a plurality of mechanical arrangements, at least two of the mechanical arrangements being configured to move orthogonally with respect to each other, each mechanical arrangement comprising;

a load carrier which can be loaded with a workpiece and/or with a processing remnant and

a load carrier drive by means of which the load carrier is movable into a target position, the load carrier drive including

a drive motor,

a rigid drive chain,

a chain driving wheel, supported on the load carrier and drivingly connected with the drive motor, which, when driven by the drive motor, acts on the rigid drive chain.

23. A system according to claim 22, wherein the rigid drive chain is braced against a chain abutment and converts a driving movement of the chain driving wheel into a movement of the load carrier into the target position, the chain driving wheel together with the load carrier moving relative to the chain abutment.

24. A system according to claim 22 wherein the mechanical arrangements are arranged in pairs, the mechanical arrangements of at least some of the pairs being configured to move together as a unit.

25. A system according to claim 24 wherein at least one pair of mechanical arrangements is configured so that the mechanical arrangements of that pair can move relative to each other.