| 摘要 |
PROBLEM TO BE SOLVED: To provide a consecutively punching method by a punch press hardly showing a consecutive punch mark even in the case of a work having relatively thick plate thickness. SOLUTION: After a first process consecutive punching is conducted to a work W while setting a die to an appropriate clearance corresponding to a plate thickness, another die having a width corresponding to a penetrating quantity generated to the work W in the previous working is set to the clearance, which is about 1/3-1/8 of the appropriate clearance, a second process consecutive punching is conducted.
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