CUTTING PLATE, HOLDER AND METHOD RELATED THEREWITH Russian patent published in 2012 - IPC B23C5/22 

FIELD: process engineering.

SUBSTANCE: invention relates to machine building and may be used in cutting hard metals, in particular, at rotary head milling machines. Cutting plate is shaped, in fact, to parallelogram and comprises top surface, first and second major radial rear surfaces crossing said top surface. First and second auxiliary axial rear surfaces cross top surface to connect first and second major axial rear surfaces. Major cutting edge is located on intersection of top surface and first major radial rear surface. Major cutting edge comprises variable radial front clearance angle including section with positive radial front angle and that with negative radial front angle. First and second major radial rear surfaces comprise, at least, two radial rear surfaces. First and second major axial rear surfaces comprise, at least, two axial rear surfaces. Tool for peripheral cutting comprises holder with, at least, one seat for said cutting plate. Invention covers also the method of fitting said cutting plate in said holder seat.

EFFECT: longer life, higher efficiency.

38 cl, 9 dwg