| 摘要 |
A chamfer angle in a cross-section at a nose cutting edge is smaller than the chamfer angle in a cross-section a distance away from the nose cutting edge. The chamfer angle is minimum at a bisector of a corner. At least three side surfaces extend between an upper surface (11) and a lower surface. A transition between two adjacent side surfaces forms a rounded nose radius surface at the cutting insert corner (14). A peripheral land (15A,15B) bridges the upper surface and side surfaces at a chamfer angle. An intersection of the land and the nose radius surface forms the nose cutting edge. |
