Cutting insert with raised cutting edge

Details Cutting insert with raised cutting edge Cutting insert with raised cutting edge

1977-01-03

1978-11-07

Hinson, Harrison L.

Cutters, for shaping

Including tool having plural alternatively usable cutting edges

With integral chip breaker, guide or deflector

B26D 112

Patent

active

041243269

ABSTRACT:
A cutting insert of hard wear resistant material such as sintered tungsten carbide having a raised negative rake cutting land forming an obtuse cutting edge angle with side walls extending normal to the cutting face. A gradual sloping surface from the inner margin of the raised cutting land provides strength compatible with downward chip flow to meet the internal substantially flat face of the insert. In a preferred embodiment a center island is provided extending to the top level of the raised cutting land which permits relatively lighter starting feeds and greater range of feed rates.

REFERENCES:
patent: 1756516 (1930-04-01), Klopstock
patent: 3416209 (1968-12-01), Contrucci et al.
patent: 3421196 (1969-01-01), Reich
patent: 3733664 (1973-05-01), McKelvey
patent: 3973307 (1976-08-01), McCreery et al.

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