Cutters – for shaping – Including tool having plural alternatively usable cutting edges – With integral chip breaker – guide or deflector
Patent
1976-08-31
1978-05-02
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
040871932
ABSTRACT:
A cutting tool made of a material that retains its cutting effectiveness at temperatures over 1200.degree. F., and including a chip breaker geometry, for the continuous machining of metal, having a first top generally planar surface and an end surface which join to define the cutting edge of the tool and which join at an included angle such that the tool has a relatively high positive rake angle. A second top generally planar surface extends from the first top surface away from the cutting edge and forms an included angle with the first top surface of between about 125.degree. and 145.degree.. The upper surface of the tool at the other end of the second top surface drops below the second top surface. This allows a chip formed during machining to move from the cutting edge, over the first and second top surfaces, and relatively unobstructed past the edge of the other end of the second top surface. The lengths of the first and second top surfaces are approximately equal and the edge at the other end of the second top surface lies below the cutting edge of the tool. The tool may be formed as a polygonal shaped insert.
REFERENCES:
patent: 1756516 (1930-04-01), Klopstock
patent: 3733664 (1973-05-01), McKelvey
patent: 3751782 (1973-08-01), Fruish
patent: 3973307 (1976-08-01), McCreery et al.
patent: 3973308 (1976-08-01), Lundgren
Hinson Harrison L.
Portnoy Allen J.
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