Authors: V.A. Korotkov

Title of the article: Increasing grinding efficiency by using grinding wheels with ordered grain shape and highly porous structure

Year: 2025, Issue: 1, Pages: 25-38

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

Index UDK: 621.922.3

DOI: 10.26730/1816-4528-2025-1-25-38

Abstract: The research in the field of creation and application of grinding wheels with ordered form of abrasive grains and high porous structure were conducted in the present work. Experimental wheels were made from grains with controlled form of white corundum grade 24A F120. Wheels were made from grains of isometric, fragmentary and needle-plate varieties, with pores from glass microspheres of grade MS-V. During the tests, blanks made of 52100 steel (AISI) in the delivery condition and of hardened steel M2 (AISI) were processed. To produce the experimental wheels, the original abrasive 24A F120 was separated by form parameter on a vibration separator into fractions, the form of the grains in which varied discretely. The coefficients of grain form in fractions were established and the relationship between the front angles of grains and their shape, as well as the relationship between the geometric parameters of grains and the work ability indicators of grinding wheels, were investigated. The results of testing experimental tools showed that the more elongated the needle-plate form of the grains and the greater their form coefficients, the sharper the front angles of the grains and the lower the components of the cutting force, deformation of the material being processed and the temperature during grinding. It was also found that the most effective is usage of isometric grains in grinding wheels for flat grinding. This allows to reduce the wear out of the grinding wheels by 9-29% compared to a standard tool made from the original abrasive, to increase the cutting ability of the wheels by 21-28% and to reduce the roughness of the processed surfaces by the Ra parameter on 22-25% and by the Rz parameter on 12-18% depending on the processed material.

Key words: grinding abrasive grain form grain form coefficient grain rake angles highly porous grinding wheels glass microspheres grinding coefficient cutting ability cutting force components roughness

Receiving date: 12.02.2025

Approval date: 01.03.2025

Publication date: 24.03.2025

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