Patent ID: 8834075
Filing Date: 2014-09-16
Classification: B23C,Y10T

Abstract:
1. A cutting insert, comprising: a top surface and a bottom surface each having a shape of a parallelogram; four side surfaces connecting the top surface and the bottom surface, the four side surfaces comprising two opposing primary side surfaces and two opposing secondary side surfaces; a mounting hole passing through the top and bottom surfaces; one or more primary cutting edges each formed at an intersection between the top surface and one of said two opposing primary side surfaces, and one or more primary cutting edges each formed at an intersection between the bottom surface and one of said two opposing primary side surfaces; one or more secondary cutting edges each formed at an intersection between the top surface and one of said two opposing secondary side surfaces, and one or more secondary cutting edges each formed at an intersection between the bottom surface and one of said two opposing secondary side surfaces; wherein the primary cutting edges form a non-zero first angle with respect to a median plane parallel to the top and bottom surfaces and being positioned therebetween; wherein the secondary cutting edges form a non-zero second angle with respect to the median plane, each secondary cutting edge being sloped relative to the median plane for a majority of that secondary cutting edge's length; wherein the primary cutting edges merge with the secondary cutting edges to form a continuous cutting edge; wherein the top surface and the bottom surface comprise a mounting surface and a rake surface, the rake surface extending from the cutting edge towards the median plane; wherein the top surface and the bottom surface are mirror symmetrical with respect to the median plane; and wherein the cutting insert is rotationally asymmetric about each axis lying in the median plane.