Hydraulic press with pressure cell

Details Hydraulic press with pressure cell Hydraulic press with pressure cell

1985-01-18

1986-03-04

Gilden, Leon

Metal deforming

By application of fluent medium, or energy field

Using fixed die

B21D 2212

Patent

active

045733350

ABSTRACT:
A hydraulic press with a pressure cell comprises a tray-shaped press plate with a bag-like diaphragm and a forming rubber pad and a press tray for a forming tool and a workpiece. The end wall portions projecting from the mid portions of each of the press plate and from the base of the press tray, provide thickness transitions which define a cavity in the operating position of the press tray. Between the press plate and/or the base of the press tray and the confronting force-absorbing surfaces of the yokes of the press frame of the press, play is provided in a portion above and below, respectively, the thickness transitions. This play allows the high stress levels which would otherwise arise at the thickness transitions to be reduced.

REFERENCES:
patent: 3007427 (1961-11-01), Bryan et al.
patent: 3021803 (1962-02-01), Lacey, Jr.
patent: 3033143 (1962-05-01), Grankowski
patent: 3531966 (1970-10-01), Pappas
patent: 3545241 (1970-12-01), Grankowski
patent: 3875778 (1975-04-01), Hellgren
patent: 3938361 (1976-02-01), Claesson
patent: 4079613 (1978-03-01), Syvakari
patent: 4080139 (1978-03-01), Hellgren
patent: 4112724 (1978-09-01), Claesson
patent: 4365494 (1982-12-01), Kurovich

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