| 摘要 |
The present invention is a tool body 1 wherein at least one insert seat 2 is formed. The insert seat 2 comprises a bottom wall surface 4 and side wall surfaces 5. The side wall surfaces 5 comprise a first side wall surface 5a and a side wall surface 5b. The first side wall surface 5a comprises at least two surface portions 5a1, 5a2. The first surface portion 5a1 is a concavely curved surface, and the second surface portion 5a2 is a flat surface or a concavely curved surface having a greater radius of curvature than the first surface portion 5a1. The two surface portions 5a1, 5a2 both abut a cutting insert. |
