| 摘要 |
<p>To enable a press machine to reliably reposition a workpiece without causing it to become offset. A press machine 1 includes a punch tool for punching a workpiece and a workpiece gripping section 23 for gripping and moving a workpiece on a table . A workpiece gripping section 23 repositions the workpiece. A control means 35 stops the punch tool while it is penetrating the workpiece during a punching operation. In this stop condition, the control means causes the workpiece gripping section 23 to perform a repositioning operation. During the repositioning operation, the control means 35 selects a punch tool with a shape other than a perfect circle to fix the workpiece. <IMAGE></p> |
