Patent ID: 9364898
Filing Date: 2016-06-14
CPC Classification: B23B,Y10T

Claim Text:
1. A cutting insert comprising: an insert main body having a top and a bottom surrounded by sides, each side being a flank face of the insert, and a rake face on the top of each of the sides; and a cutting edge which is formed between the rake face and the flank face in the insert main body and provided with a corner section which forms a convex arc shape when seen in a planar view from a direction facing the rake face and a linear section which is in contact with the corner section at least at one end of the corner section and extends linearly, wherein the cutting edge is provided with a first region along the corner section when seen in the planar view, a second region along the linear section and a third region positioned between the first region and the second region, and a rake angle of the cutting edge in the third region is greater than rake angles of the cutting edges in the first region and the second region.