Cutting insert

Details Cutting insert Cutting insert

1995-11-28

1996-12-17

Rachuba, M.

Cutters, for shaping

Including tool having plural alternatively usable cutting edges

With integral chip breaker, guide or deflector

407 2, B23B 2722

Patent

active

055846165

ABSTRACT:
An indexable cutting insert having a polygonal body including top and bottom surfaces connected by a peripheral wall having sides and corners. In a generally diamond shaped embodiment, opposite corners and the adjacent sides form cutting edges at their junctures with the top surface, forming noses at the corners. A chip groove formed on the top surface includes a pair of cutting faces, sloping downwardly from respective sides to a radius blend juncture aligned with the nose and bisecting the adjacent sides. A pair of chipbreaker faces slope upward from respective ones of the cutting faces and backward from a ridge that connects the chipbreaker faces and is upwardly aligned with the juncture of the cutting faces. The chipbreaker faces preferably have a double curvature (1) outward from the ridge and (2) upward from radius blend junctures with their adjoining cutting faces. The upward curvature is preferably a radius that slopes upwardly at a declining rate with increasing distance from the respective cutting face junctures. A third cutting face at the nose adjoins the side connected faces preferably at a common angle. Various additional features are also disclosed.

REFERENCES:
patent: 4318644 (1982-03-01), Seidel
patent: 4993892 (1991-02-01), Takahashi
patent: 5222843 (1993-06-01), Katbi et al.
patent: 5249894 (1993-10-01), Bernadic et al.
patent: 5265985 (1993-11-01), Boppana et al.
patent: 5330296 (1994-07-01), Beeghly et al.
patent: 5372463 (1994-12-01), Takahashi et al.
patent: 5456557 (1995-10-01), Bernadic et al.

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