Press having gas cylinders of plastically deformable members for

Details Press having gas cylinders of plastically deformable members for Press having gas cylinders of plastically deformable members for

1995-03-02

1997-12-30

Larson, Lowell A.

Metal deforming

By use of closed-die and coacting work-forcer

Cup or shell drawing

72465, B21D 2408

Patent

active

057017786

ABSTRACT:
A press including force applying means for producing a blank-holding force, a cushion pad which receives the blank-holding force when the cushion pad is lowered, cushion pins disposed on the cushion pad, and a pressure member supported by the upper ends of the cushion pins, so that the blank-holding force is transferred to the pressure member through the cushion pins to hold a blank placed on the pressure member, when the pressure member is moved down during a pressing operation on the blank. A plurality of mutually independent balancing members, such as gas cylinders each filled with a gaseous fluid, or plastically deformable members, are disposed in respective transfer paths of the blank-holding force between the pressure member and the respective cushion pins.

REFERENCES:
patent: 1503105 (1924-07-01), Balcker
patent: 1970134 (1934-08-01), Ferris
patent: 4414836 (1983-11-01), Saunders
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patent: 4592220 (1986-06-01), Martinez et al.
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patent: 5003807 (1991-04-01), Terrell et al.
patent: 5295383 (1994-03-01), Kirii et al.
patent: 5299444 (1994-04-01), Kirii et al.
"Concise Explanation of Relevance of Non-English Prior Art Documents Cited in IDS".

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