Cutting insert with twisted relief surface

Details Cutting insert with twisted relief surface Cutting insert with twisted relief surface

1994-01-24

1995-09-05

Lavinder, Jack W.

Cutters, for shaping

Including tool having plural alternatively usable cutting edges

407116, B23C 502

Patent

active

054473969

ABSTRACT:
A cutting insert, preferably for milling cutters, comprises an upper side or chip surface, a bottom surface and side surfaces extending between the upper and bottom surfaces. At least one of the side surfaces having a relief surface adjacent to a cutting edge, which relief surface is helically twisted along the cutting edge so that the relief or clearance angle decreases with increasing cutting depth. This arrangement makes it possible to obtain an equally large clearance along the cutting edge even with a negative inclination of the cutting insert in the milling cutter body.

REFERENCES:
patent: 4632607 (1986-12-01), Pantzar
patent: 4940369 (1990-07-01), Aebi et al.
patent: 5044840 (1991-09-01), Fouquer et al.
patent: 5052863 (1991-10-01), Satran
patent: 5071292 (1991-12-01), Satran
patent: 5145295 (1992-09-01), Satran
patent: 5199827 (1993-04-01), Pantzar
Derwent Abstract 92-031 445/04 which corresponds to Soviet Union 646 691.

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