Patent ID: 8998542
Filing Date: 2015-04-07
Classification: B23C,Y10T

Abstract:
1. A cutting insert, comprising: an upper surface; a lower surface; a side surface which is connected to each of the upper surface and the lower surface, and comprises a first side surface and a second side surface adjacent to each other; and a cutting edge comprising a major cutting edge located at an intersection of the upper surface and the first side surface, and a minor cutting edge located at an intersection of the upper surface and the second side surface, wherein the upper surface comprises a rake surface which is located along the major cutting edge and is inclined downward as the upper surface separates from the major cutting edge, and the second side surface comprises a second upper constraining surface and a second lower constraining surface in order as the second side surface goes from the upper surface to the lower surface, wherein the second upper constraining surface is inclined inward at an inclination angle α