| 摘要 |
A cutting insert (1) according to an embodiment of the present invention is provided with: at least one cutting blade (8) that is formed at the intersection ridge section of a rake face (6) and a flank face (7); and at least one protruding section (12). The cutting blade (8) comprises a cutting blade part that extends along a corner section (5). The protruding section (12) is formed so as to protrude at the rake face (6). The protruding section (12) comprises a width expansion part (13) that gradually becomes wider as proximity to the cutting blade part of the corner section increases. |
