RESEARCH OF ELECTRO-HYDRAULIC-LINEAR（EHL） PRESS MACHINE
Hidefumi YamakataYasuhiro YamauchiProf.Ken Ichiryu
Tokyo University of Technology 1404-1 Katakura, Hachiouji, Tokyo 192-0914 Japan
摘要：<正>EHL system does not need conventional hydraulic equipment. This is possible to save space and energy. EHL press machine is consisted of five components, such as master cylinder, slave cylinder, servomotor, ball screw, etc. Master cylinder and slave cylinder are coupled by fluid line. Master cylinder reciprocal motion is made possible by suitable choice of area ratio of both cylinders. Slave cylinder is driven by master cylinder and the former force is amplified by the area ratio of the former and the latter. Accumulator is used for compensation of fluid expansion due to temperature change. Semi-closed control of EHL press machine is simple but positioning accuracy is not sufficient due to compression of fluid. Therefore full closed control is required for good position accuracy. We tried application of this system to the clamping device of 10-ton load. By this combination, tact time becomes as small as 3 second.