METHOD OF DETERMINATION OF LENGTH OF CHIP CONTACT WITH CUTTING TOOL FRONT SURFACE

摘要

FIELD: machining of metals. SUBSTANCE: method consists in action of impact load on metal specimen and determination of identical radius r on metal specimen, cutting of it at speed V and measurements of chip thickness Q, determination of length C1 of its plastic contact with cutting tool front surface, determination of chip contact overall length Cc, comparison of Cc with experimentally obtained value of chip contact overall length Ce. Besides, the value of allowable error of one parameter, characterizing the specimen condition, is determined, with due account of which chip contact overall length Cc is determined and this parameter is corrected before determination of chip contact overall length Cc for different cutting parameters. Prior to action of impact load, metal specimen is subjected to action of tensile load, and stress sigma in specimen, modulus of elasticity E and deformation delay time T in specimen are determined from relation , where epsi - deformation rate. This time is selected as a correctable parameter. Length C1 of chip plastic contact with cutting tool front surface is determined from relations involving the above parameters, as well as gamma - front top rake angle of non-cutting tool. EFFECT: facilitated procedure. 1 tbln