Metal deforming – By application of fluent medium – or energy field – Using fixed die
Patent
1986-04-21
1987-09-15
Spruill, Robert L.
Metal deforming
By application of fluent medium, or energy field
Using fixed die
72 56, 72446, 29421R, B21D 2212
Patent
active
046931031
ABSTRACT:
A forming press of the pressure cell type comprising a press stand with two opposing force absorbing elements defining between them a working space into which a trough with forming tools and workpiece can be inserted; a press plate in communication with a pressure medium source; a diaphragm forming together with the press plate an expansible pressure cell; and side pieces extending along the side surfaces of the working space while keeping the diaphragm in abutment against a sealing ring disposed around the periphery of the diaphragm, said sealing ring in turn abutting against the press plate, providing thereby a quicker and simpler diaphragm exchange as compared to prior art constructions by the side pieces being turnable so that when upwardly swung, their long sides abut against the underside of the diaphragm, and by means for moving the unit formed of upwardly swung side pieces and diaphragm out of the working space; the invention also including a process for changing diaphragms in said forming press.
REFERENCES:
patent: 2848968 (1958-08-01), Novak
patent: 2962994 (1960-12-01), Wheelon
patent: 4573335 (1986-03-01), Persson
Asea AB
Jones David B.
Spruill Robert L.
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