Plastic working method and apparatus

Details Plastic working method and apparatus Plastic working method and apparatus

1989-11-14

1991-01-15

Larson, Lowell A.

Metal deforming

By use of tool acting during relative rotation between tool...

72406, B21J 1302

Patent

active

049844431

ABSTRACT:
A plastic working method and apparatus which performs swiveling motion of an upper die mounted on a die holder. A toggle mechanism is provided for power assisting function. The toggle mechanism includes a link and the die holder. Upper and lower end portion of the die holder are movably supported by upper and lower double eccentric rotary mechanisms for changing orientation of the die holder. The link is disposed within the die holder and has upper end supported by a machine frame and a lower end supported by the die holder. Orientation of the link is also changeable.

REFERENCES:
patent: 3583192 (1971-06-01), Kocks
patent: 3990285 (1976-11-01), Dragoun
patent: 3990286 (1976-11-01), Cremonesi
patent: 4069698 (1978-01-01), Dragoun
patent: 4391121 (1983-07-01), Taruntaev
patent: 4698992 (1987-10-01), Bernet

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