Patent ID: 8961076
Filing Date: 2015-02-24
Classification: B23C,Y10T

Abstract:
1. A cutting insert, comprising: an upper surface; a lower surface; a side surface; a cutting edge which is located along an intersection of the upper surface and the side surface, and comprises a major cutting edge, a flat cutting edge, and a minor cutting edge located between the major cutting edge and the flat cutting edge; an insert center axis defined by a line passing through a center of the upper surface and a center of the lower surface a land part located along the cutting edge on the upper surface; a rake face located between the land part and a central portion of a central part of the upper surface and having a rake surface angle defined as an angle formed between a line that in a sectional side view lays tangent to the rake surface, and a line that passes through the cutting edge that is orthogonal to the insert center axis, wherein the land part comprises the minor cutting edge land portion is inclined downward toward a central part of the upper surface, and a first inclination angle (θ