METHOD AND CONTROLLER FOR CONTROLLING PRESSURIZING STAGE IN PRESS APPARATUS

摘要

PROBLEM TO BE SOLVED: To prevent the generation of shock in oil pressure even when discharge is varied and to automatically increase or decrease the discharge amount in accordance with the condition of load by detecting insufficiency or excessiveness of pressurized oil from the condition of load. SOLUTION: The driving device 9 of a movable board 3 is composed of a variable discharge pump 10 which is one drive source and also, in accordance with the difference between the driving load of the movable board and prescribed driving force, the speed of the driving device is increased or decreased based on a prescribed correction rate.