Patent ID: 9623486
Date: 2017-04-18
CPC Classifications: B23B,B23C,Y10T

Claim:
1. A cutting insert, comprising: an upper surface, a lower surface, a plurality of lateral surfaces connecting the upper surface to the lower surface, a major cutting edge provided between the lateral surface and the upper surface, and a major cutting edge land surface and a major cutting edge rake surface provided in series between the major cutting edge and the upper surface, wherein: the major cutting edge rake surface has a first wavy shape in which a rake surface convex part and a rake surface concave part repeat two or more times in a direction from the major cutting edge land surface towards the upper surface; the cutting insert further comprises a minor cutting edge provided between the lateral surface and the upper surface and extended from the major cutting edge, and a corner cutting edge provided between a corner of the lateral surface and a corner of the upper surface; and the major cutting edge is positioned between the corner cutting edge and the minor cutting edge, and has a second wavy shape in which a major cutting edge convex part and a major cutting edge concave part repeat two or more times in a direction from the corner cutting edge towards the minor cutting edge.