B - Operations – Transporting – 30 – B
Patent
B - Operations, Transporting
30
B
B30B 15/18 (2006.01) B30B 1/32 (2006.01) B30B 15/16 (2006.01) F03C 1/40 (2006.01) F15B 11/08 (2006.01) G01L 9/00 (2006.01) G05D 15/00 (2006.01) G05D 16/00 (2006.01)
Patent
CA 2119101
Abstract: A method and a press for carrying out the method are proposed for controlling the drive of a hydraulic press for the purpose of forming and/or cutting sheets of metal or the like. In order to propose a novel control of the drive of such a press in which, in particular, use i made of the principal of secondary control, the different movements of the press ram and of the piston/cylinder unit driving the press ram are coordinated with one another, it being the case that a pressure network operates in a closed circuit and a maximum system pres- sure is determined by a pressure accumulator. Here, the piston of a piston/cylinder unit is restrained on both sides at as high a pressure level as possible and force is applied to the press ram by performing a selective removal of volumetric flow in one piston/cylinder unit.
Beyer Joachim
Otremba Carsten
Schaich Guenther
Fetherstonhaugh & Co.
Maschinenfabrik Mueller-Weingarten Ag
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