АБРАЗИВНЫЙ МЕТАЛЛОРЕЖУЩИЙ ИНСТРУМЕНТ ДЛЯ БЕСЦЕНТРОВОГО ШЛИФОВАНИЯ

Abstract

The paper objective: to increase the efficiency of grinding by choosing the rational characteristics of the abrasive tool, mainly according to the criterion of ensuring the necessary temperature of the tool material, without burning, ensuring the required accuracy and roughness of the treated surfaces.
 Research results: recommendations are developed on the choice of a rational abrasive tool that provides minimal softening of the part material being ground, the required surface roughness, dimensional accuracy and treatment performance.
 Conclusions:
 1. The objective is achieved by clarifying the conceptual principles and methods of rational choice of abrasive tools.
 2. The studies allowed to estimate the cutting temperatures during grinding depending on the combination of different pairs of tool and treated material. The research results make it possible to choose the grinding tool for various materials correctly.
 3. The nature of temperature influence in the cutting zone on the probability of appearing burnings and, accordingly, on the softening of the surface layer of parts is confirmed. 
 The paper presents the results of theoretical and experimental studies of centerless grinding of parts made of various materials, namely: corrosion-resistant steel grade 12X18N10T, nickel alloy grade HN60W, composite steel 12X2NVFA and characteristic structural steel grade 30XGSA.
 Novelty of the work: a new approach to the rational choice of an abrasive tool is formed, based on modeling the cutting process, taking into account the required quality and productivity of the treatment.