Patent ID: 9079257
Filing Date: 2015-07-14
Classification: B23C,Y10T

Abstract:
1. An indexable cutting insert for machining composite materials, comprising: a top surface, a bottom surface and a plurality of peripheral side surfaces, said top and bottom surfaces and said peripheral side surfaces being joined to form cutting corners, the top surface having a rake face and a central plateau; a plurality of cutting edges formed at an intersection between said top surface and plurality of side surfaces; and a plurality of triangular-shaped serrations formed in the rake face and extending radially inward from each cutting edge toward the central plateau, each serration comprising an apex and a pair of side surfaces that meet at a vertex, the cutting edge comprising a base of each triangular-shaped serration, wherein the serrations on the cutting insert provide the cutting edges with both a positive axial rake angle and a negative axial rake angle, thereby reducing delamination when machining a composite material.