Patent ID: 6733215
Filing Date: 2004-05-11
Classification: B23B,Y10T

Abstract:
A heavy-turning cutting insert comprising a top side and a bottom side, the insert defining front and rear parts,the front part terminating forwardly in a front surface situated between the top and bottom sides, a cutting edge formed in an area between the front surface and the top side, the front part including a chip breaker disposed in the top side behind the cutting edge, the rear part being thinner than the front part as measured in a direction from the top side to the bottom side, the rear part including two side surfaces converging rearwardly at an acute angle, the rear part including a recess formed in the top surface, the recess including a wall portion facing toward the front part and adapted for engaging a clamp, the cutting edge extending substantially perpendicularly to a center plane bisecting the front and rear sections midway between the side surfaces as viewed in a direction perpendicularly toward the top side, the chip breaker comprising a ridge disposed on the top side and spaced rearwardly from the cutting edge, the ridge extending to a height that is higher than the cutting edge, the height being measured perpendicularly to the bottom side, the top side further including a transition surface situated between the front and rear parts, the transition surface sloping rearwardly and downwardly from the ridge, a countersink formed in a central region of the ridge.