Tool bit with undercut hook radius

Details Tool bit with undercut hook radius Tool bit with undercut hook radius

1997-09-05

1999-02-09

Pitts, Andrea L.

Cutters, for shaping

Including tool having plural alternatively usable cutting edges

With integral chip breaker, guide or deflector

407115, 407116, B23B 2722

Patent

active

058685316

ABSTRACT:
A tool bit for a tube end squaring tool includes a cutting edge produced by machining or grinding a hook radius in the tool bit stock on the entrance angle side of the cutting edge and an undercut portion within the hook radius just rearwardly of the cutting edge on the work entrance side thereof to cause separation from the hook radius area of metal chips parted from a metal workpiece by the cutting edge to reduce friction and workpiece metal buildup on or adjacent the cutting edge. The undercut configuration reduces manufacturing costs of the tool bit which otherwise would require additional finishing operations to obtain the same reduction of friction at the cutting edge area.

REFERENCES:
patent: 1945535 (1934-02-01), Schiltz
patent: 3381349 (1968-05-01), Newcomer
patent: 3792514 (1974-02-01), Ushijima
patent: 3947937 (1976-04-01), Hertel
patent: 4060880 (1977-12-01), Nowak
patent: 4606679 (1986-08-01), Jeremias
patent: 4754789 (1988-07-01), Jonsson
patent: 4844643 (1989-07-01), Icks
patent: 4993892 (1991-02-01), Takahashi
patent: 5049009 (1991-09-01), Beck et al.
patent: 5222843 (1993-06-01), Katbi et al.
patent: 5454670 (1995-10-01), Noda et al.

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