Forming parts from ductile materials

Details Forming parts from ductile materials Forming parts from ductile materials

1990-04-18

1992-05-26

Larson, Lowell A.

Metal deforming

By use of non-deforming work-gripping clamp and relatively...

By individually non-deforming clamps

72 22, B21D 2502

Patent

active

051156610

ABSTRACT:
Method of stretch forming a workpiece comprising placing the workpiece on a former, gripping the workpiece by at least one gripper, pulling the workpiece to a desired configuration over the former by the at least one gripper, disposing a force-applying device between a fixed reaction workpiece and the workpiece and applying a desired force to the surface of the workpiece, such that the force is reacted by the force-applying device and the reaction surface. The position of the force-applying device is altered by a positioning device such that as the force is applied to different parts of the surface of the workpiece the force continues to be reacted through the force-applying device and the reaction surface in preference to being reacted through the positioning device. The positioning device is also operable to alter the position of the force applying device independently of the position of the grippers. Apparatus is also provided for carrying out the method.

REFERENCES:
patent: 2309942 (1943-02-01), Ekstedt et al.
patent: 2872964 (1959-02-01), Hollis
patent: 2924261 (1960-02-01), Zygmunt
patent: 2961028 (1960-11-01), Bath
patent: 2986194 (1961-05-01), De Marco
patent: 3354688 (1967-11-01), Bodine, Jr.
patent: 3392566 (1968-07-01), Sporck
patent: 3596492 (1971-03-01), Swanson
patent: 4077247 (1978-03-01), Stewart
patent: 4857412 (1989-08-01), Fleury
Patent Abstracts of Japan, vol. 7, No. 237 (M-250) (1382) Oct. 11, 1983.

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