Special boring insert

Details Special boring insert Special boring insert

1992-11-23

1994-08-02

Howell, Daniel W.

Cutters, for shaping

Including tool having plural alternatively usable cutting edges

407114, B26D 100

Patent

active

053339720

ABSTRACT:
An indexable, on edge, reversible cutting insert for use with a boring toolhead, comprising a body having parallelogram shaped top and bottom seating faces equipped with an off center aperture there through, and at least one cutting face. The cutting face is equipped with a bidirectional chip breaker groove on each side of the cutting face to define an island, each side groove having a slotting, progressively deepening recess extending along the edge of said cutting face, said groove presenting an increasing incident angled and having a positive rake and an axial rake around the edge of the cutting face, which together form an obtuse angle, said groove forming at least two cutting corners diagonally apposed to each other. Each cutting corner is comprised of a scalloped radius formed in the island which intersects a chip directional flat formed in the groove, at an obtuse angle to form a bidirectional pocket area.

REFERENCES:
patent: 3694876 (1972-10-01), Erkfritz
patent: 3887974 (1975-06-01), Sorice
patent: 4028782 (1977-06-01), Stansak
patent: 4111589 (1978-09-01), Goeke
patent: 4131383 (1978-12-01), Powers
patent: 4278369 (1981-07-01), Jakobs et al.
patent: 4626141 (1986-12-01), Malaker et al.
patent: 4940369 (1990-07-01), Aebi et al.

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