Press forming method and apparatus

Details Press forming method and apparatus Press forming method and apparatus

2006-04-19

2008-11-25

Banks, Derris H. (Department: 3725)

Metal deforming

By use of closed-die and coacting work-forcer

Cup or shell drawing

C072S348000, C072S414000

Reexamination Certificate

active

07454940

ABSTRACT:
A press forming method includes the following steps: (a) approaching an upper die to a lower die to form a space having a shape corresponding to at least one of concave and convex, the upper die having at least one of convex and concave, the lower die having at least one of concave and convex corresponding to at least one of convex and concave of the upper die; (b) forcing a workpiece disposed between the upper and lower dies, into the space so as to form at least one of preliminary concave and convex in the workpiece; (c) striking the upper die against the lower die so as to form at least one of concave and convex in the workpiece.

REFERENCES:
patent: 2510024 (1950-05-01), Mayer
patent: 3748889 (1973-07-01), Miller et al.
patent: 5775060 (1998-07-01), Ferrero
patent: 5881593 (1999-03-01), Bulso, Jr. et al.
patent: 5950483 (1999-09-01), Schneider et al.
patent: 195 40 294 (1997-04-01), None
patent: 673 127 (1992-08-01), None
patent: 9-024425 (1997-01-01), None
patent: 2001-314921 (2001-11-01), None
patent: 416 131 (1974-01-01), None

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