Patent ID: 9630255
Date: 2017-04-25
CPC Classifications: B23B,Y10T

Claim:
1. A cutting-off processing tool that includes a cutting edge inclined by an end cutting edge angle with respect to a normal to a longitudinal median plane of the cutting-off processing tool, comprising; a first corner positioned at a first corner side of the cutting edge and on a foremost end of the tool, a second corner positioned at a second corner side of the cutting edge and on a tool axis rear direction side relative to the first corner, the cutting edge extending between the first corner side and the second corner side, a first breaker provided on an upper surface of the cutting-off processing tool, along a side surface on the first corner side toward the tool axis rear direction, having a first width, a second breaker provided on the upper surface of the cutting-off processing tool, along a side surface on the second corner side toward the tool axis rear direction, having a second width which is wider than the first width, a rake face provided between the first corner and the second corner, having a first rake angle on the first corner side and a second rake angle on the second corner side, the second rake angle being smaller than the first rake angle, a first inclined surface connecting the first breaker and the rake face, and a second inclined surface connecting the second breaker and the rake face, wherein the first inclined surface, the rake face, and the second inclined surface constitute a recess when viewed from the foremost end, the rake face and the first inclined surface incline downwardly from the first breaker toward the second breaker and the second inclined surface incline downwardly from the second breaker toward the first breaker, an intersection of the rake face and the second inclined surface being located closer to the second corner than to the first corner.