Authors: D.B. Shatko, V.S. Lyukshin

Title of the article: Study of the strength of grinding grains

Year: 2023, Issue: 4, Pages: 26-35

Branch of knowledge: 2.5.5. Technology and equipment for mechanical and physical-technical processing

Index UDK: 621.921 : 621.922

DOI: 10.26730/1999-4125-2023-4-26-35

Abstract: The presented study is devoted to the study of the strength characteristics of individual grinding grains of various shapes. Abrasive materials have inherently brittle fracture during the cutting process. This destruction is extremely unstable and its theoretical description, taking into account many factors, is very difficult. At the same time, the strength of abrasive grains is one of the most important parameters affecting the performance of grinding tools. Therefore, the work aimed at a comprehensive study of the process of destruction of single abrasives of various grades, shapes and orientations is of great relevance. This kind of study will allow you to optimally select abrasives for the manufacture of grinding tools for specific working conditions. The aim of the work is to obtain and analyze the pattern of stresses that arise in grinding grains under various schemes for applying loads to them. As a research methodology, mathematical modeling tools were used, in particular, the finite element method was used with the involvement of the “MSC / NASTRAN” software. In addition, the strength of the grains was also evaluated by experimental methods of uniaxial compression, as well as using a swinging load, which made it possible to give an objective picture of the process. The results of static strength tests of grains of normal electrocorundum by the method of uniaxial compression, as well as data on the influence of the orientation and shape of the grinding grain on its impact strength, are presented.

Key words: Rupture of materials strength impact strength grain shape grain orientation stress distribution internal stress

Receiving date: 20.06.2023

Approval date: 15.09.2023

Publication date: 27.09.2023

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