Formation of a microprofile of product surfaces during magneto-abrasive finishing of planes with heads based on high-energy permanent magnets

Authors

DOI:

https://doi.org/10.20535/2521-1943.2025.9.1(104).324280

Keywords:

Magneto-abrasive finishing, magneto-abrasive tool, surface microprofile, flat surface, mixture, permanent magnet, end head

Abstract

Experimental studies have been carried out on the possibility of using powder mixtures consisting of large and small particles of various shapes and diamond pastes for magneto-abrasive finishing of flat surfaces of ferromagnetic parts with end heads based on permanent neodymium magnets. It was shown that when using mixtures of powders of shattered shape, the decrease in surface roughness had been obtained from the initial roughness Ra = 0.8 μm to 0.125 μm with a polished microprofile, and the best results occur when the amount of fine fraction in the mixtures does not exceed 40%. The use of mixtures of rounded powders with a particle size of 1700/1200 μm and shattered shape particles of 640/400 μm at their equal amount in the magneto–abrasive tool made it possible to form a surface with a roughness value of Ra=0.1 μm after magneto–abrasive finishing. It has been determined that rounded coarse powders act as a moving lapping tool, transferring the force load to small particles. At the same time, in the process of direct contact with the finished surface, large rounded particles provide both plastic deformation of the surface micro-irregularities and directly of the surface layer of the samples, providing an increase in surface hardness by 1.4 times, which creates favorable conditions for the micro-cutting process with shattered small particles. When forming the magneto-abrasive tool from large rounded particles and diamond paste of different grain sizes, it was found that the best polishing ability is provided by the mixture formed from rounded powder with a particle size of 1500/1300 μm with the addition of diamond paste with a grain size of 5/3 μm. The roughness parameter Ra of the surfaces being finished using such mixtures is 0.03–0.04 μm.

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Published

2025-03-18

How to Cite

[1]
D. Dzhulii, V. Maiboroda, O. Burikov, and O. Belajev, “Formation of a microprofile of product surfaces during magneto-abrasive finishing of planes with heads based on high-energy permanent magnets”, Mech. Adv. Technol., vol. 9, no. 1(104), pp. 114–118, Mar. 2025.

Issue

Vol. 9 No. 1(104) (2025)

Section

Up-to-date machines and the technologies of mechanical engineering

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