JPS51145989A - Punching machine - Google Patents

Abstract

PURPOSE: An applying plate 22 to the second position-determining apparatus 7 is set so that the second co-ordonate of parts to be perforated,of a material to be processed 30 passes through the center of a die 4, and at the same time, the position of each holder 10 is set so that while the first co-ordinate of each of the parts to be perforated,of the material to be processed 30 reaches the upper surface of the center of the die 4, the end of the material to be processed 30 butts each of butting parts 19. A reset arm 12 of the first position-determining apparatus 6 is rotation-operated upward, and all butting members 11 are rotation-reset so that the butting parts 19 protrude upwards from the upper surface of the die 4, In this state, the material to be processed 30 is carried above the die 4 while its end is rub-contacted with said applying plate 22, and the other end of the material to be processed 30 is caused to butt the butting part 19 of the first butting member 11. Thus the first part to be perforated is subjected to perforation operation, by the determination of the position of the center of the die 4.

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