Development of a normative base for resource-saving technologies in mechanical processing

Abstract

The aim of the work is to analyze energy transformations in the finishing turning of steel with carbide-tipped cutting blades with the subsequent development of the regulatory framework for resource-saving technologies for machining. Universal theoretical models for determining the optimal cutting conditions should be based on consideration of the cutting process as a complex of interrelated phenomena, the intensity of each of which can be expressed through a single integral energy criterion. A significant number of interconnected physical processes in steel turning with a carbide tool with reinforcement or wear-resistant coating and the dependence of their intensity on cutting conditions and properties of the surface layer of the tool acquired by it as a result of reinforcing effect requires a comprehensive analysis of the links of the integrated energy criterion of the cutting process with cutting conditions.

The article formulated a system of links of the integral energy criterion of the cutting process with cutting conditions. During machining, the energy consumption required for chip removal is reduced by 10-15%, if not the maximum allowance is removed, but probabilistic. The consumption of thermal energy going to heat the workpiece when turning decreases by 20% when removing the actual allowance. A useful part of the energy balance will be considered constant for a given pair of "solid glow - processed material". The minimum of thermal energy or any increase in internal energy is required and sufficient to form a surface when removing the material layer with a given section of the cut. The surplus of the energy component that exceeds this minimum will be considered as a "harmful" part, which is spent on the intensification of contact processes, and, accordingly, on the demolition of the instrument. In the article on the basis of the analysis of energy transformations in the finishing of steel by cutters with carbide cutting plates, the system of connections of the integral energy criterion of cutting process with cutting modes was formulated. When machining the amount of energy needed to remove chips, it decreases if not the maximum allowable, but probabilistic. The consumption of heat energy, which goes to the heating of the workpiece at the precision, decreases, with the removal of the actual allowance.