ДОСЛІДЖЕННЯ ПРОЦЕСІВ ОБРОБКИ ПОВЕРХОНЬ ЕЛАСТИЧНИМИ АБРАЗИВНИМИ ІНСТРУМЕНТАМИ

Abstract

The article discusses the process of interaction of an elastic abrasive wheel with the surface being treated, for which the stiffness and cutting micro-relief of elastic abrasive wheels are experimentally investigated and mathematically described, the mathematical expectations for the number of grains in contact with the treated. The material and the depth of their contact with the machined surface are considered to be the forces acting on the machined surface, the wear resistance of elastic abrasive wheels and the temperature in the cutting zone were experimentally investigated. Microgeometry issues of the cutting surface of an abrasive disc, the process of cutting with an abrasive grain, and also the question of removing material, forming the surface layer after processing with an abrasive disc, rounding out sharp edges, as well as options for solving the problem of efficient processing with an abrasive tool. In the article, the parameters of material removal and roughness of the treated surface during surface cleaning are calculated. The results of experimental studies of material removal and surface roughness in the processing of parts with elastic abrasive wheels are presented. The experimental data are compared with the data obtained from the calculations. The microrelief of the cutting part of the elastic abrasive wheel and its interaction with the treated surface (in turn, which has its own microrelief) were investigated, as a result of which the material is removed and the surface roughness is formed. For experimental studies of the stiffness of elastic wheels, (Minnesota Mining and Manufacturing Company) elastic abrasive wheels made of Scotch-Brite ™ abrasive material were used. This material consists of synthetic fibers forming a three-dimensional non-woven fabric, throughout the volume of which the abrasive grains are evenly distributed. It has been substantiated that profilographing should be adopted as a method for obtaining primaryinformation about the microrelief of the working surface of an elastic abrasive wheel. Theoretical positions of the interaction of the cutting microrelief of an elastic abrasive tool with the surface to be processed were developed on the basis of the theory of random processes with the determinationof the force of interaction of an elastic abrasive wheel with the surface being processed.