Indexable threading insert with pressed-in chip breaker

Details Indexable threading insert with pressed-in chip breaker Indexable threading insert with pressed-in chip breaker

1994-06-29

1996-08-27

Hughes, S. Thomas

Cutters, for shaping

Including tool having plural alternatively usable cutting edges

With integral chip breaker, guide or deflector

407115, B23B 2716

Patent

active

055494250

ABSTRACT:
A two cutting edge, indexable insert with integral pressed-in chip breaker wherein the cutting edges are symmetrically inverted relative to each other to thereby provide indexing therebetween. Each cutting edge is provided with a plurality of noses and gullets. The shape of the noses and gullets is predetermined to provide a predetermined thread contour, such as a buttress thread form. Each pressed in chip breaker is spaced from the adjacent cutting edge by a land and is in the form of a raised island having an incident face contour corresponding to the nose-and-gullet shape of the adjacent cutting edge. Each land is angled such that when the insert is mounted for use with an intended inclination, portions of the land are at neutral rake when engaging a workpiece.

REFERENCES:
patent: 4189264 (1980-02-01), Kraemer
patent: 4233867 (1980-11-01), Zimmerman
patent: 4572713 (1986-02-01), Schmidt
patent: 4669925 (1987-06-01), Lowe et al.
patent: 4705434 (1987-11-01), Patterson et al.
patent: 4854785 (1989-08-01), Lowe et al.
patent: 5059070 (1991-10-01), Baker
patent: 5122017 (1992-06-01), Niebauer

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