Cutters – for shaping – Rotary cutting tool – Including holder having seat for inserted tool
Patent
1992-03-25
1993-03-02
Bishop, Steven C.
Cutters, for shaping
Rotary cutting tool
Including holder having seat for inserted tool
407113, B23C 520
Patent
active
051904187
ABSTRACT:
A rotary cutter is disclosed which includes a cutter body having an axis of rotation therethrough and a cutting insert releasably secured to a forward end of the cutter body. The cutting insert has marginal ridges defining a main cutting edge and an auxilliary cutting edge. The main cutting edge is directed radially outwardly of the cutter body while the auxiliary cutting edge is directed axially forwardly of the cutter body. The cutting insert has faces defining a first rake surface and a second rake surface. The first rake surface is disposed adjacent to the main and auxiliary cutting edges such that an axial rake angle is no less than +30.degree.. The second rake surface is disposed between the first rake surface and the auxiliary cutting edge such that an angle, defined between the second rake surface and the axis of rotation of the body as viewed in a cross-section perpendicular to the auxiliary cutting edge, is no larger than .degree.20.degree.. The second rake surface is formed such that a distance, measured in a direction parallel to the first rake surface and defined between the auxiliary cutting edge and the intersection of the first rake surface with the second rake surface, is set so as to range from 0.5 mm to 1.5 mm.
REFERENCES:
patent: 3486210 (1969-12-01), Greenleaf
patent: 3486211 (1969-12-01), Greenleaf
patent: 4645384 (1987-02-01), Shimomura et al.
patent: 4808044 (1989-02-01), Tsujimura et al.
patent: 5056963 (1991-10-01), Kameno et al.
Nakayama Masaaki
Okawa Masayuki
Saito Junichi
Bishop Steven C.
Mitsubishi Materials Corporation
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