发明名称 |
Press machine |
摘要 |
A press machine includes a lifting mechanism that selectively lowers and lifts a die on a movable side. The lifting mechanism includes a motor driven lifting unit using a servomotor as a drive source thereof, and a hydraulically driven lifting unit using a hydraulic actuator as a drive source thereof. The lifting mechanism is controlled so as to enable the motor driven lifting unit to move the die on the movable side from a standby position to a drive system changeover position immediately before a press start position at which the die on the movable side starts contacting a workpiece to be processed and so as to enable the hydraulically driven lifting unit to move the die on the movable side from the drive system changeover position to a top dead center position. |
申请公布号 |
US9138794(B2) |
申请公布日期 |
2015.09.22 |
申请号 |
US201113819740 |
申请日期 |
2011.08.09 |
申请人 |
Murata Machinery, Ltd. |
发明人 |
Imaeda Wataru;Watanabe Akinobu |
分类号 |
B21D5/02;B30B15/02;B30B1/23;B30B1/18;B30B1/32;B30B15/16;B30B15/18 |
主分类号 |
B21D5/02 |
代理机构 |
Keating & Bennett, LLP |
代理人 |
Keating & Bennett, LLP |
主权项 |
1. A press machine comprising:
a main body frame; a die on a stationary side which is held in position in a fixed state relative to the main body frame; a die on a movable side, which is movable up and down between a standby position distant from the stationary die and a bottom dead center position adjacent the stationary die; a lifting mechanism to drive the movable die, the lifting mechanism including a motor driven lifting unit including a servomotor as a drive source therefor, and a hydraulically driven lifting unit including a hydraulic actuator as a drive source therefor; and a control device programmed to control the lifting mechanism; wherein the control device is programmed to control the lifting mechanism so that the movable die is driven by the motor driven lifting unit from the standby position to a drive system changeover position immediately preceding a press start position at which the movable die starts contacting a workpiece to be processed, and the movable die is driven by the hydraulically driven lifting unit from the drive system changeover position to the bottom dead center position. |
地址 |
Kyoto JP |