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US 10,040,125 B2Granted
Cutting insert
AssigneeSumitomo Electric Hardmetal Corp.
InventorsNaoki Matsuda, Yousei Tensaka, Shinya Fujisawa
Life of this patent
Estimating the term…
Abstract
A cutting insert includes a rake face, a flank face, a cutting edge formed at a ridge where the rake face and the flank face intersect, a land provided on the rake face along the cutting edge, a breaker groove provided in the rake face inside of the land, and a curved surface formed between a groove surface of the breaker groove and the land. A radius of curvature of the curved surface is 0.5 mm or greater.
Claims5
A cutting insert comprising:
- a rake face;
- a flank face;
- a cutting edge formed at a ridge where the rake face and the flank face intersect and including a corner cutting edge and a linear cutting edge;
- a land provided on the rake face along the cutting edge;
- a breaker groove provided in the rake face inside of the land;
- and
- a convex curved surface formed between an inclined groove surface of the breaker groove and the land;
- and
- the land having a distance from the corner cutting edge to a connection point with the convex curved surface being 0.05 mm or greater and less than or equal to 1/3 of a land width (L) of the land formed along the linear cutting edge,
- wherein a radius of curvature of the convex curved surface in a portion including the corner cutting edge is 0.5 mm or greater and is larger than a radius of curvature of the convex curved surface in a portion including the linear cutting edge.
7 more elements
Dependencies are inferred from the claim text.