| 摘要 |
<p>In a cutting insert (1), a cutting edge (4) is formed on a peripheral border of a rake face (2); a protruding section (5) is formed on the rake face (2); a pair of convex sections (7) is formed so as to extend toward the cutting edge (4); the convex sections (7) face toward a corner portion (4A); the convex sections (7) include first wall surfaces (7A) and second wall surfaces (7B); the first wall surfaces (7A) and the second wall surfaces (7B) are inclined surfaces that are inclined toward the rake face (2) as those are farther from ridgelines (M) intersecting with each other; and the intersection ridgelines (M) intersect with a wall surface (5B) of the protruding section (5), at a position lower than a top portion (5A) of the protruding section (5) in the corner portion (4A) side.
</p> |
