| 摘要 |
The present invention discloses an insert being capable of performing successively a cutting process and a chamfering process after mounting to the tool holder. An insert according to the present invention comprises a parting section for cutting a rotating work-piece; and a chamfering section having a width larger than that of the parting section, the chamfering section being formed integrally with the parting section at a rear side of the parting section to chamfer the work-piece cut by the parting section. A cutting edge to be contacted with the work-piece is formed at an upper edge of a front end surface of the parting section for cutting the work-piece, and the chamfering section has a step on at least one lateral side, and the forward surface of the step is formed of a curved surface to make an upper edge to chamfer an edge portion of a cut surface of the work-piece. |
