Punching apparatus for stamping and method for producing the same

摘要

A stamping punch (92) of a punching apparatus for stamping (10) comprises a grip member (94) which is provided with crosspieces (95) formed between long grooves (93) on side walls of a rectangular parallelepiped, and a plurality of punch members (96) which are formed integrally with the grip member (94). The respective punch members (96) are arranged in parallel to one another. A plurality of long holes (90) are defined on a punch holder (86). A large amount of adhesive is contained in the gap between joining surfaces when the grip members (94) of the stamping punches (92) are inserted and secured into the respective long holes (90). Accordingly, the positional accuracy of the punch member (86) is improved, the accuracy of the hole defined through a workpiece is improved, and it is possible to eliminate any fear of occurrence of defect in shape. Further, the rigidity of the punch member (86) can be improved, the stripper is prevented from application of unbalanced load, and the punch is easily exchangeable.