Forming machine

Details Forming machine Forming machine

1993-09-30

1995-09-05

Jones, David

Metal deforming

With means to drive tool

Including pneumatic- or fluid-actuated tool support

7245306, 7245208, 72402, B21J 912

Patent

active

054470501

ABSTRACT:
In a forming machine of the hydraulic press or forging machine type having at least one press cylinder acted on by a pair of values of stroke frequency and stroke volume predetermined by a first piston pump, the stroke frequency and stroke volume of the press cylinder can be adapted to the working requirements from cogging to planishing if the press cylinder has associated with it a second piston pump in parallel with the first piston pump and having a second pair of values of stroke frequency and stroke volume different from the first pair of values, and if the two piston pumps can be switched to connect them to the press cylinder simultaneously or alternatively.

REFERENCES:
patent: 3835682 (1974-09-01), Elger
patent: 3916667 (1975-11-01), Paknke et al.
patent: 4502307 (1985-03-01), Grunewald

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