STUDIES ON INCREASING THE HARDNESS OF THE WORKING SURFACE OF THE REPLACEABLE ELEMENT OF A FIBER SEPARATOR GRID BAR BY ULTRASONIC TREATMENT

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Published: 22.09.2026
DOI: https://doi.org/10.70769/3030-3214.SRT.4.3.2026.42
Keywords:
fiber separator, grid bar, replaceable insert, ultrasonic treatment, surface hardness, Steel 45, cotton fiber, friction coefficient, wear resistance, surface roughness, hardened layer, plastic deformation, nanostructure

Main Article Content

Axmedov, X.A.
M.T. Urazbaev Institute of Mechanics and Seismic Stability of Structures, Academy of Sciences of the Republic of Uzbekistan
Xaydarova, M.X.
Department for Putting Land Plots of Bukhara District up for Auction

Abstract

This article investigates the improvement of the working-surface hardness of a replaceable insert of the grid bar of a 4DP-130 saw-type cotton fiber separator using ultrasonic treatment. Steel 45, which is widely available and economically advantageous in Uzbekistan, was selected as the insert material. Treatment regimes were investigated at a frequency of 22 kHz, amplitudes of 10–25 µm, and a static force of 200 N. The results showed that under the optimal treatment regime of A=20 µm, P=200 N, and n=2 passes, the surface hardness increased from 210 HV to 480 HV, corresponding to a 2.3-fold increase, while the hardened layer depth reached approximately 200 µm. Surface roughness Ra decreased from 1.25 to 0.34 µm, and the friction coefficient with cotton fiber decreased from 0.34 to 0.23. A 45% reduction in abrasive wear confirms the effectiveness of ultrasonic treatment in improving the service life of the replaceable insert. The obtained results are of practical importance for the modernization of working components of cotton-processing machines using locally available Steel 45.

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Article Details

Issue

Vol. 4 No. 3 (2026)

Section

Light Industry Sectors
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Author Biographies

Axmedov, X.A., M.T. Urazbaev Institute of Mechanics and Seismic Stability of Structures, Academy of Sciences of the Republic of Uzbekistan

Leading Researcher, M.T. Urazbaev Institute of Mechanics and Seismic Stability of Structures, Academy of Sciences of the Republic of Uzbekistan, Doctor of Technical Sciences (DSc), Tashkent, Uzbekistan

Xaydarova, M.X., Department for Putting Land Plots of Bukhara District up for Auction

Specialist, Department for Putting Land Plots of Bukhara District up for Auction, Bukhara, Uzbekistan

How to Cite

Axmedov, X. A., & Xaydarova, M. X. (2026). STUDIES ON INCREASING THE HARDNESS OF THE WORKING SURFACE OF THE REPLACEABLE ELEMENT OF A FIBER SEPARATOR GRID BAR BY ULTRASONIC TREATMENT. Digital Technologies in Industry, 4(3), 303-309. https://doi.org/10.70769/3030-3214.SRT.4.3.2026.42

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