Cutters – for shaping – Including tool having plural alternatively usable cutting edges – With integral chip breaker – guide or deflector
Patent
1990-08-28
1991-09-03
Schmidt, Frederick R.
Cutters, for shaping
Including tool having plural alternatively usable cutting edges
With integral chip breaker, guide or deflector
B23B 2722
Patent
active
050448390
ABSTRACT:
A polygonal throw-away insert defining a cutting edge at the periphery thereof, a center land and a breaker groove formed therein between the cutting edge and the center land. Pairs of slopes protrude upwardly in the breaker groove, near each corner portion of the insert, at an oblique angle of 5-20 degrees and in symmetrical relation with each other with respect to the bisectors of the corner portion so as to define a ridge therebetween. Breaker protrusions extend from the center land toward the corner portions and have tapered ends. Breaker walls extend obliquely upwardly from rear ends of the pairs of slopes to the front ends of the breaker protrusions, respectively. And ellipsoidal grooves are formed in the breaker grooves so as to be contiguous with the breaker walls.
REFERENCES:
patent: 4359300 (1982-11-01), Hazra
patent: 4411565 (1983-10-01), Hazra
patent: 4616963 (1986-10-01), Habert
patent: 4685844 (1987-08-01), McCreery
patent: 4720217 (1988-01-01), Bonjour
patent: 4859122 (1989-08-01), Patterson
patent: 4880338 (1989-11-01), Stashko
patent: 4915548 (1990-04-01), Fouquet
patent: 4941780 (1990-07-01), Takahashi
Schmidt Frederick R.
Shideler Blynn
Sumitomo Electric Industries Ltd.
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