Patent ID: 6604893
Filing Date: 2003-08-12
Classification: B23C,Y10T

Abstract:
An indexable cutting insert, comprising:a polygonal body of wear resistant material, the body including a center, top and bottom surfaces, and a plurality of side surfaces between the top and bottom surfaces; a plurality of leading cutting edges formed at an intersection of the plurality of side surfaces and the top surface; a plurality of wiper edges formed at the intersection of the plurality of side surfaces and the top surface; and a corner separating each leading cutting edge and each wiper edge, wherein for a cutting operation the insert engages a workpiece using one of the leading cutting edges for coarse cutting operations and one of the wiper edges for fine cutting operations, wherein the top surface includes a rake surface extending inwardly from each leading cutting edge toward the center of the insert body, and wherein the top surface includes a deflecting surface extending upwardly and inwardly toward the center region of the insert body and away from the leading cutting edge to form a transition zone between adjacent rake surfaces.