Shearing in punch press and die therefor

Details Shearing in punch press and die therefor Shearing in punch press and die therefor

1986-11-03

1988-04-19

Yost, Frank T.

Cutting

Processes

With reorientation of tool between cuts

83 49, 83556, 83620, 83916, B26D 502

Patent

active

047381736

ABSTRACT:
A method for shearing a plate-like workpiece using a punch press includes providing a punch having two adjacent blades disposed at a specified angle with respect to one another and a die having two blades corresponding to the blades of the punch. The punch and die are adjusted so that one of the blades on one of the punch and die will not mate with the corresponding blade on the other of the punch and die, and the other blade on one of the punch and die will mate with the corresponding blade of the other of the punch and die. The punch and die are brought together to shear the workpiece between the mating, corresponding blades of the punch and die. In one embodiment the blades of the punch are fixed on the base of the punch so as to be fixed with respect to one another. In a second embodiment, the punch is divided into two parts by a sliding surface which bisects the specified angle between the blades of the punch, so that the blades of the punch are longitudinally slidable with respect to one another.

REFERENCES:
patent: 4483227 (1984-11-01), Camisa
patent: 4534255 (1985-08-01), Salvagnini
patent: 4674373 (1987-06-01), Kuppinger
patent: 4696211 (1987-09-01), Bitzel

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