Throwaway insert and throwaway cutting tool

Cutters – for shaping – Including holder having seat for inserted tool – With chip breaker – guide or deflector

Reexamination Certificate

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Details

C407S113000, C407S116000

Reexamination Certificate

active

06935814

ABSTRACT:
A throwaway insert comprises an insert body formed in a polygonal shape, a cutting face formed by a polygonal face of the insert body, a corner cutting edge which is formed in a curved shape at a corner of the cutting face, a major cutting edge which is formed along a side edge of the cutting face that is connected to a first end of the corner cutting edge, and a concave portion which is formed, in another side edge of the cutting face that is connected to a second end of the corner cutting edge, so as to be adjacent to the second end of the corner cutting edge, and so as to be made concave toward the inside of the cutting face from a tangent of the corner cutting edge drawn at the second end of the corner cutting edge. By using the throwaway insert, cut chips are prevented from being packed in a gap between the throwaway insert and a surface being machined, and the fixing rigidity of the throwaway insert is increased.

REFERENCES:
patent: 5791832 (1998-08-01), Yamayose
patent: 5921721 (1999-07-01), Hintze et al.
patent: 6158927 (2000-12-01), Cole et al.
patent: 6213691 (2001-04-01), Leeb
patent: 44 34 297 (1996-03-01), None
patent: 100 52 963 (2002-05-01), None
patent: 1 122 010 (2001-08-01), None
patent: 2000-141123 (2000-05-01), None

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