South Ural State University, Chelyabinsk, Russia

A. V. Vydrin, Dr. Eng., Prof., Head of the Dept. of Processes and Machines for Metal Forming, e-mail: vydrinav@susu.ru
A. P. Pellenen, Cand. Eng., Associate Prof., Dept. of Processes and Machines for Metal Forming, e-mail: pellenenap@susu.ru
V. S. Gorbunova, Postgraduate Student, Dept. of Processes and Machines for Metal Forming, e-mail: vika.salkova6039@gmail.com

Nosov Magnitogorsk State Technical University, Magnitogorsk, Russia

A. M. Pesin, Dr. Eng., Prof., Dept. of Materials Processing Technologies, e-mail: a.pesin@magtu.ru

The paper is aimed at a detailed study of the rolling-driving process from the point of view of application of different friction coefficients on the driven and driving rolling rolls. The novelty of the work is to obtain a modernized condition of strip capture and to determine the reach of different ratios of friction coefficients in a particular case. The application of such scientific novelty will allow researchers to determine in advance the possibility of application of this or that ratio of friction coefficients on rolls, and also to exclude the application of impossible and fruitless ratios of friction coefficients. According to the results of the made theoretical research, it was possible to estimate the influence of friction coefficients on the value of compression of short plates and to form a modernized condition of strip capture for the rolling-driving process, without the application of longitudinal forces on the boundaries of the deformation center. Also, it was possible to verify the realization of the strip gripping condition at the given different friction coefficients on the driving and driven rolls, in the process of which the limitations of the friction coefficient ratios in the special case were revealed and the area of their reach was found. To achieve the obtained results it was necessary to consider the deformation center for asymmetrical rolling of short plates, to refer to the standard condition of strip gripping and to perform the calculation for the process of strip rolling-drawing with respect to relative compression.
The study was supported by the grant of the Russian Science Foundation (No. 23-79-30015).

1. Polukhin V. P., Skorokhodov V. N., Polyakov M. G. Efficiency of the asymmetric process of rolling thin strips. Theory and technology of metal deformation: collection of scientific papers of the Moscow Institute of Steel and Alloys. 1978. No. 110. pp. 71–77.
2. Vydrin V. N., Ageev L. M. Fundamental and theoretical foundations of the new process “rolling - drawing”. Theory and technology of rolling: collection of scientific papers. Chelyabinsk : ChPI, 1971. pp. 3–21.
3. Grudev A. P. Theory of rolling: textbook for universities in the specialty “Metal Forming”. Moscow : Metallurgiya, 1988. 239 p.
4. Mazur V. L., Nogovitsyn A. V. Theory and technology of thin sheet rolling (numerical analysis and technical applications). Dnepropetrovsk : RBA “Dnipro-VAL“, 2010. 500 p.
5. Vincze G., Simões F., Butuc M. C. Asymmetrical rolling of aluminum alloys and steels: a review. Metals. 2020. Vol. 10. 1126. DOI: 10.3390/met10091126
6. Kosturek R., Mróz S., Stefanik A., Szota P. et al. Study on symmetry and asymmetry rolling of AA2519-T62 alloy at room-temperature and cryogenic conditions. Materials. 2022. Vol. 15. 7712. DOI: 10.3390/ma15217712
7. Taali S., Moazzen P., Toroghinejad M. R., Chen G. et al. Microstructure, texture, and mechanical properties of asymmetrically cold-rolled Ni1.5FeCrCu0.5 high-entropy alloy. Journal of Materials Research and Technology. 2022. Vol. 21. pp. 3489–3501. DOI: 10.1016/j.jmrt.2022.10.147
8. Graça A., Vincze G., Wen W., Butuc M. С. et al. Numerical study on asymmetrical rolled aluminum alloy sheets using the visco-plastic self-consistent (VPSC) method. Metals. 2022. Vol. 12. 979. DOI: 10.3390/met12060979
9. Skorokhodov V. N., Muravlev M. A., Skorokhodov S. N. Geometry of the deformation zone during asymmetric thin-sheet rolling. Izvestiya vuzov. Chernaya metallurgiya. 1988. No. 11. pp. 56–61.
10. Salganik V. M., Pesin A. M. Asymmetric thin sheet rolling: development of theory, technology and new solutions. Moscow : MISiS, 1997. 192 p.
11. Vydrin A. V. Theory of plastic deformation of metals and alloys. Chelyabinsk : Izdatelskiy tsentr YuUrGU, 2020. 218 p.
12. Grudev A. P., Zilber Yu. N., Telik V. T. Friction and lubrication in metal forming. Moscow : Metallurgiya, 1982. 312 p.