| 摘要 |
PROBLEM TO BE SOLVED: To improve work efficiency of a crank press for performing a processing of a workpiece, while racing a motor.SOLUTION: When performing continuously a processing having a plurality of steps to a workpiece by a crank press, as for prescribed two continuous steps, after performing a processing of a preceding step, a processing of a subsequent step is also performed while racing a motor, and after finish of the processing of the preceding step, the motor is driven to remove a period for increasing speed of a flywheel, and to thereby improve work efficiency of the crank press.SELECTED DRAWING: Figure 2 |
