Hydropunch for use in a press

Details Hydropunch for use in a press Hydropunch for use in a press

1980-01-03

1982-08-17

Crosby, Gene

Metal deforming

With means to drive tool

Including pneumatic- or fluid-actuated tool support

72 63, 7245302, B21J 738

Patent

active

043443133

ABSTRACT:
A hydropunch comprises a cylinder, with one end thereof facing the working surface of a die intended for positioning thereon a workpiece to be treated. Accommodated inside the cylinder and forming an above-the-ram chamber and a below-the-ram chamber is a ram which is actuated by means of a suitable actuator mounted on that end of the cylinder which is opposite to the aforementioned end thereof, the ram being connected with a system for returning the ram to its original position. In addition, the hydropunch includes a compressed gas receiver communicating with the above-the-ram chamber of the cylinder, and a cover adapted for closing both the cylinder and receiver. In accordance with the invention, the system for returning the ram to its original position comprises a closed chamber communicating with the below-the-ram chamber of the cylinder, and a value intended for communicating the above-the-ram chamber with the atmosphere.

REFERENCES:
patent: 1562426 (1925-11-01), Erickson
patent: 3205790 (1965-09-01), Bollar
patent: 3352143 (1967-11-01), Bollar
patent: 3376723 (1968-04-01), Chelminski
patent: 3584498 (1971-06-01), Beche

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