CORNER CUTTING THROW AWAY TIP AND THROW AWAY TYPE TURN CUTTING TOOL

摘要

PROBLEM TO BE SOLVED: To smoothly cut a cutting object so as the corner of the cutting object may be close to a square without damaging the outer circumferential cutting edge with regard to a throw away type turn cutting tool having a corner cutting throw away tip fitted to the outer circumferential end of the tool body. ;SOLUTION: A corner cutting throw away tip 10, which is composed of cutting edges 11a, 11b of their plane figures forming nearly a parallelogram and formed in at least two linear shapes with their outer circumferential cutting edges 11 crossing each other in a way of protruding a little to the outer circumferential side and which includes a first flank 12a of a flank 12 on the outer circumferential cutting edge 11 being a small clearance angle and a second flank 12b of a larger clearance angle than that of the first flank 12a, is fitted to the outer circumference of the tool body end so that the axial rake angle is within the range of 10°±5°, the radial rake angle is within the range of -20° +10°, and the radius of gyration of the tip end and the rear end of the outer circumferential cutting edge 11 may coincide by using the corner cutting throw away tip 10.;COPYRIGHT: (C)1998,JPO