| 摘要 |
<p>This die cushion control device (80) controls a die cushion device (2) configured from a cushion pad (30) and an actuator (40) in lockstep with the rising/falling operation of a slide (10), and has the function of, before contact between the slide and the cushion pad, changing the amount of operation of the actuator to a stepped form or a ramped form during a period of time shorter than a characteristic period in a manner so that a desired cushioning force is obtained at a first timing, and then changing the amount of operation to a stepped form in the opposite direction at a second timing set in a settable period from the first maximum value of the cushioning force until a decline to half the value thereof. By means of the present invention, it is possible to provide a die cushion control device that can achieve a reduction in power consumption and the limitation/elimination of cycling time.</p> |
