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METHOD AND DEVICE FOR CONTROLLING THE SYNCHRONISM OF CYLINDER/PISTON UNITS AND FOR REDUCING PEAK PRESSURE DURING FORMING AND/OR FINE BLANKING IN PRESSES.
METHOD AND DEVICE FOR CONTROLLING THE SYNCHRONISM OF CYLINDER/PISTON UNITS AND FOR REDUCING PEAK PRESSURE DURING FORMING AND/OR FINE BLANKING IN PRESSES.
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机译:用于控制汽缸/活塞单元的同步性并在压力机中成形和/或精冲时降低峰值压力的方法和装置。
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摘要
The method involves maintaining a cylinder/piston unit (1) at a preadjustable cushion pressure (P1) by an accumulator (10) e.g. bladder accumulator. The unit is subjected to a preadjustable displacement pressure. A rise in pressure in the form of a pressure pulse caused by impact between a tool e.g. punch, and a workpiece is regulated, independently of quantity of control oil, from a displacement pressure (P3) in another accumulator (19) to a permissible set pressure, where available cushion pressure allows synchronization of ejection of the workpiece with retraction of a press ram. An independent claim is also included for an apparatus for controlling a piston/cylinder unit for a counterforce ram or vee ring and for reducing pressure peaks during fineblanking or forming of workpieces on a fineblanking or stamping press.
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