Reconfigurable clamp for a flexible manufacturing system

• US 20050269757A1
• Filed: 06/03/2005
• Published: 12/08/2005
• Est. Priority Date: 06/04/2004
• Status: Abandoned Application

• Current Assignee: GM Global Technology Operations Incorporated (Motors Liquidation Co. GUC Trust)
• Original Assignee: GM Global Technology Operations Incorporated (Motors Liquidation Co. GUC Trust)
• Inventors: Menassa, Roland J., Sears, Ivan G., Stevenson, Robin
• Application Number:
  US11/144,262
• Publication Number:
  US 20050269757A1
• Time in Patent Office: Days
• US Class Current: 269/266
• CPC Class Codes: B23K 11/10 Spot welding; Stitch welding
• CPC Class Codes: B23K 37/0435 Clamps
• CPC Class Codes: B23K 37/0443 Jigs
• CPC Class Codes: B25B 1/2421 the parts having a linear movement

Abstract

A reconfigurable clamp for providing support for a variety of different body panel configurations employed in the vehicle assembly without requiring manual adjustment or reprogramming. The clamp includes an adjustable contact portion comprising a plurality of pins slidably engaged within sleeves formed in a body portion. The pins include a head portion and a shaft portion extending from the head portion, wherein the shaft portion has an engageable portion. The clamp further comprises a plurality of slidably mounted rods disposed generally transverse to the movement of the pins within the sleeves. The slidably mounted rods have a complementary engageable portion that lockingly engages the engageable portion of the shaft portion upon contact therewith to selectively prevent further movement of the pins within the sleeves, such as may be desired once a workpiece is loaded onto the clamp.

Claims

1. A reconfigurable clamp, comprising:

a reconfigurable contact portion comprising a body, a sleeve disposed within the body, a pin disposed in sliding engagement with the sleeve, and an opening in transverse communication with the sleeve, wherein the pin comprises a head, a shaft comprising an engageable portion extending from the head, and a compression spring in operative communication with the shaft and the body; and

a linear slide portion comprising a movable body and a rod extending from the movable body;

wherein one end of the rod is slidably mounted in the opening and comprises a geometry complementary to the engageable portion.

2. The reconfigurable clamp of claim 1, wherein the body comprises a plurality of the pins spatially located therein, wherein each one of the plurality of pins is in sliding engagement one of a plurality of the sleeves and is in operable communication with a selected one of the rods.

3. The reconfigurable clamp of claim 1 further comprising a spacer member intermediate the movable body and the body, wherein the spacer is in operative communication with the rod.

4. The reconfigurable clamp of claim 1, further comprising a compression spring intermediate the movable portion and the rod.

5. The reconfigurable clamp of claim 1, wherein the movable body is in operative communication with a cam adapted to selectively move the movable body.

6. The reconfigurable clamp of claim 1, wherein the movable body is in operative communication with a solenoid adapted to selectively move the movable body.

7. The reconfigurable clamp of claim 1, wherein the body has at least one gimbaled surface.

8. The reconfigurable clamp of claim 1, wherein the head further comprises a polymeric coating disposed thereon.

9. The reconfigurable clamp of claim 1, wherein the head has a diameter greater than a shaft diameter.

10. The reconfigurable clamp of claim 1, wherein the sleeve is dimensioned to prevent lateral movement of the pin.

11. The reconfigurable clamp of claim 1, wherein the rod comprises a compliant material adapted to provide the complementary geometry upon contact with the engageable portion.

12. A reconfigurable clamp system, comprising:

a support comprising a reconfigurable contact portion comprising a body, a sleeve disposed within the body, a pin disposed in sliding engagement with the sleeve, and an opening in transverse communication with the sleeve, wherein the pin comprises a head, a shaft comprising an engageable portion extending from the head, and a compression spring in operative communication with the shaft and the body, and a linear slide portion comprising a movable body, and a rod extending from the movable body, wherein one end of the rod is slidably mounted in the opening and comprises a geometry complementary to the engageable portion; and

a member in operative communication with the support.

13. The reconfigurable clamp system of claim 12, wherein the body comprises a plurality of pins spatially located therein, wherein each one of the plurality of pins is in sliding engagement with a selected one of a plurality of sleeves.

14. The reconfigurable clamp system of claim 12, wherein the engageable portion comprises a serrated portion or a threaded portion or a recessed portion.

15. The reconfigurable clamp system of claim 12, further comprising a spacer member intermediate the movable body and the body, wherein the spacer is in operative communication with the rod.

16. The reconfigurable clamp of claim 12, further comprising a compression spring intermediate the movable portion and the rod.

17. The reconfigurable clamp of claim 12, wherein the movable body is in operative communication with a cam or a solenoid adapted to selectively move the movable body.

18. The reconfigurable clamp of claim 12, wherein the rod comprises a compliant material adapted to provide the complementary geometry upon contact with the engageable portion.

19. A process for clamping a workpiece, the process comprising:

loading a first workpiece onto a reconfigurable clamp, wherein the reconfigurable clamp comprises a reconfigurable contact portion comprising a body, a sleeve disposed within the body, a pin disposed in sliding engagement with the sleeve, and an opening in transverse communication with the sleeve, wherein the pin comprises a head, a shaft comprising an engageable portion extending from the head, and a compression spring in operative communication with the shaft and the body, and a linear slide portion comprising a movable body, and a rod extending from the movable body, wherein one end of the rod is slidably mounted in the opening and comprises a geometry complementary to the engageable portion;

compressing the pin to conform substantially to a surface contour of the first workpiece;

moving the movable body in an amount and direction effective to advance the rod to lockingly engage the engageable portion; and

applying a member to a backside of the first workpiece.

20. The process of claim 19, further comprising removing the member;

moving the movable body in an amount and direction effective to retract the rod to locking disengage the engageable portion; and

removing the first workpiece from the reconfigurable clamp.

21. The process of claim 19, further comprising loading a second workpiece onto the reconfigurable clamp, wherein the second workpiece has a different surface contour than the first workpiece;

compressing the pin to conform substantially to a surface contour of the second workpiece;

moving the movable body in the amount and direction effective to advance the rod to lockingly engage the engageable portion; and

applying a member to a backside of the surface of the second workpiece.