| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a die which is suitable to blanking of a metal sheet-like material or the like, in which the life of the cutting edge part of punch components and die components is prolonged without degrading the quality of a product. Ž<P>SOLUTION: In the blanking die for use in blanking of a planar material 6, a stepped part 4a where the side face interval of a short side of a cutting edge part-inserting opening hole 4 of the die parts 3 into which the cutting edge part 2 of the punch parts 1 is to be inserted is expanded in the blanking direction of the punch parts 1 is provided on the way of the depth into which the cutting edge part 2 is inserted. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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