JPS5794432A - Automatic punching work device - Google Patents

Abstract

PURPOSE: To perform punching work without stopping an automatic punchig work device, by using a couple of the opposite triangularly formed punches which utilize the opposite angles of a square.

CONSTITUTION: A punch 21 is fitted to an upper turret, and four corner parts of a rectangular hole 27 to be worked are punched with the punch 21 in conformity to the sides of the rectangular hole 27. Then, the turret is rotated to position a press part, where a square punch is fitted, over work parts 28, and two corners 29 which have not be punched with the punch 21 are punched with the square punch. Then, the turret is rotated to form work holes 30 and 31 by using a laterally long rectangular punch, and the turret is rotated to form work holes 32 and 33 by using a longitudinally long punch, thus completing the prior work of the rectangular hole 34. For the punching the work parts 28 from a plate material 1, work holes 36, 37, 38, and 39 are formed by a conventional method. Then, the plate material 1 is taken out to cut eight connection parts a₁Wa₈ of the rectangular hole 34 and four connection parts b₁Wb₄ of the work parts 28, thus completing the manufacture of the work parts 28.

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