| 摘要 |
A cutting insert (1) of one embodiment is provided with: an insert body having a top surface (2) that has a corner section (21), a first side (22) and a second side (23), a bottom surface (3), and side surfaces (4); a cutting edge (6) that is positioned at an intersection between the top surface and the side surfaces, and includes a corner cutting edge (61), a first cutting edge (62) and a second cutting edge (63); a rake face (5) that slopes downward away from the cutting edge; and a first raised part (71) that is positioned inside the rake face, and rises upward. The first raised part includes a protruding section (71 c) that is positioned on a bisecting line of the corner section and protrudes toward the corner cutting edge. The cutting insert is further provided with a second raised part (72) that is positioned on the tip side of the protruding section and extends toward the first cutting edge and the second cutting edge from the protruding section, and has a convex curved shape in which, when viewed from above, the outer peripheral edge on the corner section side forms a protuberance extending toward the corner section. |
