Die assembly for use in general type mechanical press machine

Details Die assembly for use in general type mechanical press machine Die assembly for use in general type mechanical press machine

1984-04-09

1987-03-31

Spruill, Robert L.

Metal deforming

With means to actuate both elements of tool-couple

72354, 72360, 7245303, 72449, 72450, B21J 500, B21J 918

Patent

active

046533109

ABSTRACT:
A die assembly for use in a general type mechanical press machine has opposite upper and lower dies adapted to be fitted in upper and lower die sets, respectively, so as to be slidable freely by a predetermined stroke, and a differential mechanism interposed between the upper and lower dies so as to transmit a predetermined rate of displacement to the lower die in accordance with the movement or displacement of the upper die set. The differential mechanism comprises a rack and pinion mechanism or linkage having two pair of link mechanisms.

REFERENCES:
patent: 290449 (1883-12-01), Meatyard
patent: 1979931 (1934-11-01), Beche
patent: 4274276 (1981-06-01), Mettler

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