Patent ID: 6146065
Filing Date: 2000-11-14
Classification: B23B,Y10T

Abstract:
A cutting insert for bar peeling, the insert comprising a multi-cornered body having top and bottom surfaces and a peripheral edge surface extending therebetween, said peripheral edge surface including corner faces disposed at respective corners of said body and intersecting said top surface to form main cutting edges therewith, each corner face including a curved portion of convex curvature as said insert is viewed from above along a line of sight perpendicular to the top surface, each said curved portion intersecting said top surface to form a curved portion of a respective main cutting edge, said peripheral edge surface including flat interconnecting portions, each flat interconnecting portion interconnecting a respective pair of said corner faces and intersecting said top surface to form a straight edge, said top surface defining a chip face including a chip former, said chip former comprising an elevated plateau, corner portions of said plateau comprising protrusions disposed at respective ones of the corners, each protrusion being non-symmetric with respect to a corner bisector of the respective corner and including a downwardly extending side wall, said side wall of each protrusion including a first portion disposed on one side of said corner bisector and being of concave shape as said insert is viewed from above along a line of sight perpendicular to the top surface, and a second portion disposed on an opposite side of said corner bisector and being of convex shape as said insert is viewed from above along a line of sight perpendicular to the top surface, each of the first and second portions being in non-intersecting relationship with the peripheral edge surface.