Thread cutting insert

Details Thread cutting insert Thread cutting insert

2007-07-10

2007-07-10

Fridie, Jr., Willmon (Department: 3722)

Cutters, for shaping

Including tool having plural alternatively usable cutting edges

With integral chip breaker, guide or deflector

C407S115000, C407S116000, C407S113000

Reexamination Certificate

active

11258404

ABSTRACT:
A thread cutting insert includes main cutting edges that have a pair of thread cutting edges and wiper thread cutting edges for full profile on side edges of a rake face formed on the insert body respectively. The pair of thread cutting edges is formed in a convex V shape as viewed in a plane facing the rake face, and the wiper thread cutting edges for full profile are connected to posterior ends of the thread cutting edges. An inner portion of a V-shaped projection of the rake face, which is formed on the front side of the wiper thread cutting edge for full profile by the pair of thread cutting edges, is formed not to protrude from the thread cutting edges as viewed in the plane. A first convex protrusion projecting from the rake face, a second convex protrusion higher than the first convex protrusion, and the third convex protrusion higher than the first and second convex protrusions project on the rear side of the wiper thread cutting edge for full profile of the rake face as viewed in the plane, and the first and second convex protrusions are positioned closer to the main cutting edge than the third convex protrusions.

REFERENCES:
patent: 4575888 (1986-03-01), Muren
patent: 4673924 (1987-06-01), Taylor
patent: 4674924 (1987-06-01), Carlsson et al.
patent: 4993892 (1991-02-01), Takahashi
patent: 5765972 (1998-06-01), Ericksson et al.
patent: 5810518 (1998-09-01), Wiman et al.
patent: 6293738 (2001-09-01), Hartlohner et al.
patent: 9-502396 (1997-03-01), None
patent: 2001-514089 (2001-09-01), None
patent: WO-95/07159 (1995-03-01), None
patent: WO-99/11416 (1999-03-01), None
Patent Abstracts of Japan for JP08-257837 published Oct. 8, 1996.
Patent Abstracts of Japan for JP08-294804 published Nov. 12, 1996.

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