| 摘要 |
A metal cutting insert having front and side cutting edges (27,25a,b) located in a plane and having a front chip deflector surface (37,38) spaced from the cutting edges, projecting out of said plane and directed along the length of the front cutting edge (27) and first and second side chip forming grooves (30a,b) directed respectively along the lengths of the side cutting edges (25a,b), each groove (30a,b) comprising a descending surface (31a), a groove base (32a) and a rising chip deflector surface (33a) the latter projecting out of said plane, said descending and rising surfaces being formed with successive ridges (34a,b) and recesses (35a,b) along the length thereof. |
