Technology, energy, agriculture transport AIC

Ludmila SHVETS – Candidate of Technical Sciences, Associate Professor, Department of Agricultural Engineering and Technical Service Vinnytsia National Agrarian University (Sunny str., 3, Vinnytsia, Ukraine, 21008, e-mail:  shlv0505@i.ua, https://orcid.org/0000-0002-4364-0126). 

Kateryna CHMYKH – Postgraduate Student of the Vinnytsia National Agrarian University (Sunny str., 3, Vinnytsia, Ukraine, 21008, e-mail: catherina099@gmail.com, https://orcid.org/0000-0001-8873-4436). 

Taras HUTSOL – Doctor of Engineering Sciences, Professor of the Department of Machine Operation, Ergonomics and Production Processes, Faculty of Production and Power Engineering, University of Agriculture in Krakow (Balicka 116B, 30-149 Krakow, Poland; e-mail: taras.hutsol@urk.edu.pl, https://orcid.org/0000-0002-9086-3672). 

This paper presents an in-depth analysis of the relationship between kinematic rolling parameters and the physical and mechanical properties of aluminum alloys. For the first time, a refined method for calculating spread and lead is proposed, which, unlike existing techniques, accounts for the dynamic changes in deformation resistance throughout the entire deformation zone. This allowed for the establishment of more accurate functional dependencies between the reduction degree, rolling speed, and the direction of metal flow in both longitudinal and transverse directions. Special attention is paid to the influence of the material's rheological properties on the non-uniformity of velocity distribution in the contact and internal layers of the workpiece.
A comprehensive approach was applied in this study, combining theoretical analysis of the deformation zone kinematics and mathematical modeling of plastic flow processes. The computational part is based on the principles of continuum mechanics, considering the temperature-velocity factor and contact friction conditions typical for the hot deformation of aluminum alloys. To verify the obtained data, a comparative analysis with experimental research results was conducted.
It is proved that traditional calculation models exhibit significant errors when working with high-plasticity aluminum alloys under high-temperature conditions. The refined calculation algorithm ensures high convergence with experimental data (error minimized to 5%). It was established that precise regulation of lead parameters at a heating temperature of both the workpiece and the tool within 250–350°C prevents surface defects such as laps and edge non-uniformity, which is critically important for rolling parts with complex cross-sections.
The implementation of the developed method into the production process significantly improves the geometric precision of the finished rolled products and stabilizes the mill setup process. This minimizes the volume of technological scrap and ensures the rational use of expensive raw materials. The economic effect is achieved by reducing energy consumption for scrap reprocessing and substantially increasing the yield of usable products. The research results can be recommended for use by design bureaus for roll pass design and the development of automated control systems for rolling processes.

1.    Chmykh, K. V. (2025). Doslidzhennia rozshyrennia dlia aliuminiievoho splavu ak6 pry hariachomu prokatuvanni [Investigation of spread for AK6 aluminum alloy during hot rolling]. Vibratsii v tekhnitsi ta tekhnolohiiakh, 4(119), 96-101. https://doi.org/10.37128/2306-8744-2025-4-11 [in Ukrainian].
2.    Shvets, L. V., & Trukhanska, O. O. (2022). Eksperymentalni doslidzhennia valtsiuvannia zahotovok z aliuminiievykh splaviv v umovakh izotermichnoho deformuvannia [Experimental studies of rolling aluminum alloy workpieces under isothermal deformation conditions]. Vibratsii v tekhnitsi ta tekhnolohiiakh, 2(105), 104-114. https://doi.org/10.37128/2306-8744-2022-2-13 [in Ukrainian].
3.    Shvets, L. V., & Chmykh, K. V. (2022). Analitychni doslidzhennia metodiv hariachoho deformuvannia metaliv [Analytical studies of hot metal deformation methods]. Tekhnika, enerhetyka, transport APK, 3(118), 95-104. https://doi.org/10.37128/2520-6168-2022-3-12 [in Ukrainian].
4.    Skriabin, S. O. (2007). Tekhnolohiia hariachoho deformuvannia zahotovok iz aliuminiievykh splaviv na kuvalnykh valtsiakh [Technology of hot deformation of aluminum alloy workpieces on forging rolls]. Vinnytsia: A. Vlasiuk. [in Ukrainian].
5.    Shvets, L. V., Paladiychuk, Y. B., & Trukhanskaya, O. O. (2019). Technical service in the agro-industrial complex. Vol. I. Textbook. VNAU. [in Ukrainian].
6.    Chmykh, K. (2025). Investigation of forward slip during hot rolling of the AK6 aluminum alloy. Tekhnika, enerhetyka, transport APK, 3(130), 53-58. https://doi.org/10.37128/2520-6168-2025-3-5 [in Ukrainian].
7.    Shvets, L. (2020). Extension value, with hot rolled aluminum alloy specimens, round section in smooth rollers. In Scientific foundations of modern engineering. Monography. Boston, USA, 234-240. https://doi.org/10.46299/ISG.2020.MONO.TECH.I [in Ukrainian].