| 摘要 |
PROBLEM TO BE SOLVED: To improve the yield of a formed product in which working is applied to a blanked fracture. SOLUTION: The blanking apparatus comprises: a blanking punch; a die; and a stroke amount measuring means for the blanking punch. In the side face of the blanking punch, a displacement gauge measuring the distance with a workpiece is buried. The blanking device further comprises a calculation means calculating one or more kinds selected from the sagging ratio, sheared face ratio and fracture ratio on the basis of the measured value by the displacement gauge. COPYRIGHT: (C)2009,JPO&INPIT
|
