Pressure control apparatus for hydromechanical drawing

Details Pressure control apparatus for hydromechanical drawing Pressure control apparatus for hydromechanical drawing

1980-12-12

1983-12-13

Gilden, Leon

Metal deforming

By application of fluent medium, or energy field

With actuated tool engaging work

72 60, 72481, B21D 3908

Patent

active

044198760

ABSTRACT:
Device for the control of the pressure in the pressure chamber for the hydromechanical deep drawing of sheet metal in hydraulic presses wherein the pressure chamber constitutes the drawing die. The control system has at least one two-diametered piston transmitter mounted in a hydraulic cylinder which on the side of the smaller diameter of the piston of the piston transmitter is connected to the space of the pressure chamber and on the other, larger diameter side of the piston transmitter is provided with a supply line for the pressure medium. The control system may include several hydraulic cylinders with two-diameter piston transmitters, the volume of the parallel hydraulic cylinders at the side of the smaller diameters of pistons of the piston transmitters is equal to, or greater than, the volume of the pressing in the pressure chamber.

REFERENCES:
patent: 1015913 (1912-01-01), Stratton et al.
patent: 2856121 (1958-10-01), Buehler
patent: 2931497 (1960-04-01), Billen
patent: 3046923 (1962-07-01), Yolin
patent: 3491565 (1970-01-01), Birman
patent: 3596485 (1971-08-01), Burk
patent: 3614883 (1971-10-01), Kramer
patent: 3962895 (1976-06-01), Rydell

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