Cutting inserts

Details Cutting inserts Cutting inserts

1997-09-05

2000-12-26

Tsai, Henry W. H.

Cutters, for shaping

Including tool having plural alternatively usable cutting edges

407102, 407103, 407114, B23B 2700, B26D 114

Patent

active

061648787

ABSTRACT:
A cutting insert has an upper surface bounded by a cutting edge, a base, and a peripheral flank surface. The shape of the peripheral flank surface varies along the height of the cutting insert. Near the top of the peripheral flank surface, it conforms to the round or polygonal geometry of the cutting edge so as to provide support for the cutting edge. Lower down the cutting insert, the peripheral flank surface is shaped to provide transverse bearing surfaces which have considerably lower pressure angles, i.e., resistance to turning moments, than would be provided by the inherent geometry of the cutting edge. Preferably, these transverse bearing surfaces are formed by recessed features such as channels, and most preferably, as chevron-type channels. This latter possibility leads to a lower cross-sectional geometry which approximates to an n-pointed star.

REFERENCES:
patent: 637495 (1899-11-01), Arnold
patent: 1838520 (1931-12-01), Archer
patent: 4812087 (1989-03-01), Stashko
patent: 5199827 (1993-04-01), Pantzar
patent: 5236288 (1993-08-01), Flueckiger
patent: 5346336 (1994-09-01), Rescigno
patent: 5658100 (1997-08-01), Deiss et al.
patent: 5688083 (1997-11-01), Boianjiu
patent: 5733073 (1998-03-01), Zitzlaff et al.

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