Patent ID: 8678717
Filing Date: 2014-03-25
Classification: B23B,Y10T

Abstract:
1. A cutting insert comprising: a cutting edge formed in a ridge part of a top surface of the cutting insert; a rake face region formed continuously with the cutting edge on the top surface; and a clamp face region located more inward and higher than the rake face region on the top surface, wherein a first rake face formed continuously with the cutting edge on the rake face region; a second rake face formed in an inclined surface shape from the first rake face toward the clamp face region, on the rake face region; a projection being formed so that at least a part of the projection is located on the first rake face, and comprising a top portion disposed at a position corresponding to a middle region of the cutting edge when viewed from above; and a concave part being entirely located on the second rake face, and being located more inward than the projection when viewed from above, wherein the projection is one in number; and when viewed from above, a midpoint of a width of the concave part is located on a straight line X passing a midpoint of the cutting edge and a top portion of the projection.