Mazur M. Development of theoretical bases and practical use of thermomechanistic model of plastic materials machining

Cutting tool, contact stresses, temperatures and wear intensity on rake and flank tool surfaces, model of cutting process. Development of theoretical bases of iterative model of plastic deformation parameters theoretical account, contact stresses and temperatures on rake and flank tool surfaces without holding experiments but only on the basis of detected correlation between them, balance and convergence of operating forces and temperature influence on a deformed material yield point. With the purpose of optimum cutting process control. Analytical, numerical (FEM) and experimental (sectional tool method, weight method, etc) reseaching model were used. The analytical-iteration method of account of temperatures and contact parameters on rake surface is offered. The specified associations for definition of contact length between a chip and rake tool surface are developed. The technique of stresses account on flank tool surface is developed. The influence of a flank surface wear process on stresses and tem peratures distribution on it is investigated in view braked body-built-up edge presence. There are offered, investigated and taken into manufacture the modes of tool wear-resistance heightening in 2…3 times by cyclical restoring of wear-resistant fragmented structures in a contact surface layer and by a modification of physical-chemical situation in cutting zone. Machine building, metal machining.