Cutting insert

Details Cutting insert Cutting insert

1991-02-27

1993-06-01

Bishop, Steven C.

Cutters, for shaping

With chip breaker, guide or deflector

Comprising concave surface in cutting face of tool

407114, 407119, B23B 2722, B23B 2716

Patent

active

052154157

ABSTRACT:
In a cutting insert, a base plate is formed into a polygonal configuration having a plurality of corners. At least one cutting-edge element is mounted on an upper surface of the corner of the base plate. The cutting-edge element is composed of a high-hardness sintered section and a super-hard sintered section which are superimposed one upon the other. The cutting-edge element is brazed to the upper surface of the corner of the base plate under such a condition that the super-hard sintered section is exposed to an upper surface of the base plate. The super-hard sintered section has its upper surface which is formed therein with a chip breaker having a surface roughness within a range of from 0.5S to 10S. Furthermore, in a polygonal cutting insert having a plurality of corners which have formed therein respective chip breakers, at least one of the chip breakers is different in form from the remaining chip breakers.

REFERENCES:
patent: 2053977 (1936-09-01), Taylor
patent: 2309371 (1943-01-01), Wissler
patent: 3781956 (1974-01-01), Jones et al.
patent: 3792514 (1974-02-01), Ushijima
patent: 4437800 (1984-03-01), Araki et al.
patent: 4959929 (1990-10-01), Burnand et al.

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