Cutting Insert
OwnerHiroyuki Nishidainventor
Life of this patent
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Abstract
Provided is a cutting insert including an insert body in the form of a substantially rhombic flat plate, a rake face on at least one rhombic surface of the insert body, a corner portion provided at a corner of the rake face, and at least one pair of cutting edges provided at a side ridge portion of the rake face and crossing the corner portion. A breaker projection is provided on the rake face near the corner portion so as to bulge gradually along a bisector of the corner portion with distance from the corner portion. The breaker projection includes a front apex portion substantially in the shape of a convex circular arc in a section along the bisector and a side portion which includes a recess substantially in the shape of a concave circular arc in a section perpendicular to the bisector.
Claims7
A cutting insert comprising an insert body in the form of a polygonal flat plate, a rake face on at least one polygonal surface of the insert body, a corner portion provided at a corner of the rake face, and at least one pair of cutting edges provided at a side ridge portion of the rake face and crossing the corner portion, the cutting insert wherein
- a breaker projection is provided on the rake face near the corner portion so as to bulge gradually along a bisector of the corner portion with distance from the corner portion, and
- the breaker projection comprises a front apex portion substantially in the shape of a convex circular arc in a section along the bisector and a side portion which comprises a recess substantially in the shape of a concave circular arc in a section perpendicular to the bisector.
Dependencies are inferred from the claim text.