CUTTING TIP WITH BENT BACK SURFACE Russian patent published in 1998 - IPC

FIELD: cutting tip to metal cutting chipping tools, particularly to milling cutters. SUBSTANCE: back surface of cutting tip is shaped in such a way that it is possible to set optimal relief angle for different cutting depth values at negative axial inclination of cutting tip in body of milling cutter. Constant relief angle is sustained along cutting edge at negative axial inclination of cutting tip in body of milling cutter. All above mentioned characteristics are provided due to making back surface between two cutting angles in the form of helix twisted in such a way that relief angle decreases when cutting depth increases. EFFECT: decrease and elimination of initial tendency of tool for vibration at working by means of absolutely new cutting edges. 9 cl, 3 dwg