| 摘要 |
<p>This invention aims at reducing the vibration occurring during a motion of a vacuum transfer apparatus in a transfer press, and prevent the misfeeding of a work. To achieve this object, accelerometers (30, 32) are set on a crossbar (21) laid laterally on a crossbar carrier (20) on each of left and right lift bars (1), and they are connected to a controller through integrators (31, 33). An actuator (10) is provided on a drive rod (8) via which a lift lever (7) and a lift box (3) are connected together, and a hydraulic servo-valve (11) and the controller (34) are connected to each other through a servo-amplifier (35). The controller (34) is adapted to determine moment by moment the control input into an actuator (10) on the basis of measurement amounts of vibration from the accelerometers (30, 32) and the dynamic characteristics of the crossbar (21), and operate the actuator (10) every time the control input is determined, whereby the vibration of a transfer apparatus is reduced.</p> |
