Tabbing tool and method

Details Tabbing tool and method Tabbing tool and method

1995-11-13

1997-08-12

Crane, Daniel C.

Metal deforming

With cutting

By shearing tool-couple

723792, 72412, B21D 3710

Patent

active

056554010

ABSTRACT:
A tabbing tool for reducing residual tab burrs on parts punched from a generally flat sheet metal piece (50) includes a punch portion (10) and a die portion (32). The punch portion includes a first punch face (24) that extends at a shallow angle and a second punch face (26) that extends at a greater angle. The die portion includes a recess (38) bounded by a straight edge (40). The recess is further bounded by a first die surface (42), a generally vertically extending second die surface (44) and a third die surface (46) that extends at the shallow angle. In operation a tab (58) which extends between a part portion (60) and an external portion (62) is deformed between the punch and die portions of the tabbing tool to compress and thin the tab adjacent to the part portion and cause the tab to extend into the recess in the die portion. Upon defining the contour of the part by punching openings in the piece, the part is removed by shaking the piece. Shaking fractures the tab portions and minimal tab burrs remain with the part. Burrs that do remain are readily removed through automatic deburring operations.

REFERENCES:
patent: 3211034 (1965-10-01), Andris
patent: 3357078 (1967-12-01), Moltchan
patent: 4154184 (1979-05-01), Keller

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