| 摘要 |
The present invention is directed to a cutting insert (10) with a rake face (20), a seating surface (25) and a plurality of flank faces (30a-30d) extending between the rake face and the seating surface. The intersection of the rake face and the plurality of flank faces define a plurality of cutting edges (35a-35d). The rake face (20) of the insert (10) has a plurality of corner regions (40a-40d) formed at the intersection of side cutting edges (35a 35d) to define corner cutting edges (45a-45d). The corner cutting edge (45a-45d) in at least one corner region (40a-40d) has a recessed profile (50a) when viewed from the side of the insert. The recessed profile (50a) has a concave shape and extends inwardly from the cutting edge (45a). At the cutting edge, the recess has a conical shape to define a conical portion (55a) and further inward from the cutting edge the recess may have a cylindrical shape to define a cylindrical portion (60a). |
