Fluid forming apparatus having controllably variable forming pre

Details Fluid forming apparatus having controllably variable forming pre Fluid forming apparatus having controllably variable forming pre

1974-12-04

1976-06-15

Larson, Lowell A.

Metal deforming

By application of fluent medium, or energy field

Using fixed die

267119, B21D 2212

Patent

active

039628957

ABSTRACT:
Fluid forming apparatus having a constant-volume pressure cavity has oppositely movable rigid forming tool parts, each connected with a piston comprising a double acting cylinder mechanism. Forming pressure is developed by hydraulically forcing one tool part in the direction that tends to reduce cavity volume, thus, by reaction, forcing the other tool part in the opposite direction against restraint. A cam mechanism moving with said one tool part defines a pressure program. Sensor means, cooperating with the cam and with pressure regulating valve mechanism, controls pressure of the fluid driving said one tool part in accordance with the program and the position of that tool part.

REFERENCES:
patent: 3290919 (1966-12-01), Malinak et al.
patent: 3357218 (1967-12-01), Mitchell
patent: 3635061 (1972-01-01), Rydell
patent: 3635074 (1972-01-01), Moos et al.

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