Press-forming method of a sheet and apparatus therefor

Details Press-forming method of a sheet and apparatus therefor Press-forming method of a sheet and apparatus therefor

1996-05-02

1998-05-26

Jones, David

Metal deforming

By application of fluent medium, or energy field

With actuated tool engaging work

72350, B21D 2222, B21D 2602

Patent

active

057551294

ABSTRACT:
A sheet pressing method and apparatus using a die and a punch. The invention encompasses holding a sheet between the die and a blank holder to form a first contact surface between the die and the sheet and a second contact surface between the sheet and the blank holder; forming a third contact surface between the punch and the sheet; supplying a pressurized liquid to at least one contact surface; and pressing the sheet through the die with an aid of the punch.

REFERENCES:
patent: 2821156 (1958-01-01), Lyons
patent: 3756051 (1973-09-01), Rebsamen et al.
patent: 4361020 (1982-11-01), Hirota et al.
patent: 4472955 (1984-09-01), Nakamura et al.
patent: 5159826 (1992-11-01), Miyazawa et al.

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