Cutting Insert, Cutting Tool, and Method of Cutting Work Material Using the Cutting Tool

Abstract

A cutting insert comprising a cutting edge; a rake face region formed continuously with the cutting edge; and a clamp face region located more inward and higher than the rake face region. The cutting insert comprising, on the rake face region, a first rake face formed continuously with the cutting edge; a second rake face formed in an inclined surface shape from the first rake face toward the clamp face region; a projection 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 or a convex part formed so that at least a part thereof is located on the second rake face, and located more inward than the projection when viewed from above. Thereby, in groove machining in which the chip discharge space is narrow, chip accumulation into the insert and frictional resistance generated in the rake face region is decreased, exhibiting high cutting discharge performance. A cutting tool mounting the cutting insert, and a method of cutting a work material using the cutting tool are also provided.

Dependencies are inferred from the claim text.