METHOD FOR CONTROLLING THE DRIVE OF A HYDRAULIC PRESS AND DEVICE FOR CARRYING OUT THE METHOD

摘要

: 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 pressure 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.