| 摘要 |
PROBLEM TO BE SOLVED: To obtain an excellent forming precision by arranging a protruding part, which has a prescribed height and in which its rear end face is abutted on the upper face of a work, to the base bottom part of a stripper. SOLUTION: The rear face 74 of a center protruding part 73 is abutted on the upper face of a plate 26 in forming and a stripper 32 is positioned, the space is formed between the upper face of the plate 26 and a base bottom part 72 in the region in the outer edge direction between the base bottom part 72 and the rear face 74, the interference of the projecting part of an upper emboss 70 with the stripper 32 is avoided. In forming, the upper emboss 70 is formed and is abutted on the upper face of the plate 26 to be positioned, a punched hole 71 is formed. When plural embosses having different heights are formed to the plate 26, the punched hole 71 is formed at the last among the embosses. By this method, forming a hole precision deterioration due to elastic deformation in forming is eliminated, the position and shape precision of the punched hole 71 is made excellent. Preferably, a protruding part is a stripper having a center protruding part encircling a die passing part.
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