Patent ID: 9327354
Filing Date: 2016-05-03
CPC Classification: B23B,B23C,Y10T

Claim Text:
1. A cutting insert, comprising: a polygonal shaped upper surface; a lower surface being identical in shape to the upper surface; a side surface connected to each of the upper surface and the lower surface; and an upper cutting edge located at an intersecting part of the upper surface and the side surface, wherein the upper surface comprises a first corner, and a second corner and a third corner respectively adjacent to both sides of the first corner, wherein the upper surface sequentially comprises wherein the upper cutting edge sequentially comprises a corner cutting edge, and a minor cutting edge and a major cutting edge each being inclined toward the lower surface on the basis of the perpendicular plane as going away from the corner cutting edge, and the corner cutting edge and the minor cutting edge and the major cutting edge are disposed in a direction from the first corner to each of the second corner and the third corner, wherein the rake surface comprises wherein an intersecting part of the rake surface and the connection surface comprises a highest position in a portion of the intersecting part corresponding to the minor rake surface.