JSC NPP Mashprom, Ekaterinburg, Russia¹ ; Ural Federal University named after the first President of Russia B. N. Yeltsin, Ekaterinburg, Russia²:

S. V. Mylnikov, Technical Expert¹, Postgraduate Student²
R. F. Iskhakov, Cand. Eng., Associate Prof., Director on Engineering Technology¹, Dept. of Metal Forming², e-mail: r.f.iskhakov@urfu.ru

Ural Federal University named after the first President of Russia B. N. Yeltsin, Ekaterinburg, Russia:
D. L. Shvarts, Dr. Eng., Associate Prof., Head of the Dept. of Metal Forming

When rolled and cooled on cooling beds, the long product acquires defects such as sickliness, longitudinal curvature and boxiness. To eliminate these defects, leveling in roller leveling machines with the method of elastic-plastic bending is used. In the course of material research, it was found that there are no works related to leveling asymmetric profiles. This paper is a starting point for the development of a leveling technology for asymmetric profiles, by the example of rail dressing. According to the other authors it is necessary to achieve a high rate of plastic deformation penetration in the straightening process. The article presents the results of 3D modelling of asymmetric profile leveling process by the example of rail liner profile in Deform 3D software package. Stress-strain state data were obtained and results were analysed. According to calculation results, distribution graph of plastic strain penetration coefficient has been plotted. It is noted that the maximum value of plastic strain penetration coefficient is observed for roll 3. The defects of the rolled products will be eliminated.

1. Nedorezov I. V. Modeling of steel straightening processes on roller machines. Ekaterinburg : AKVA-PRESS, 2003. 256 p.
2. Slonim A. Z., Sonin A. L. Flattening sheet and straightening section metal (technology and equipment). Moscow : Metallurgiya, 1981. 232 p.
3. Ostrinsky A. S. Determination of design parameters of roller straightening machines. Trudy VNIIMETMASH: collection of articles. No. 18. 1966. pp. 7–32.
4. Maksimov E. A. Parameters, designs and adjustments of roller flattening machines when flattening sheet metal. Mekhanicheskoe oborudovanie metallurgicheskikh zavodov. 2020. No. 1 (14). pp. 31–38.
5. Maksimov E. A., Shatalov R. L. Adjustment of tension multi-roller devices in the processing of flat products. Stal. 2014. No. 1. pp. 49–51.
6. Korolev A. A. Design and calculation of machines and mechanisms of rolling mills. Moscow : Metallurgiya, 1983. 371 p.
7. Storozhev M. V., Popov E. A. Theory of metal forming. Moscow : Mashinostroenie, 1971. 419 p.
8. Behrens B.-A., Nadi T. E., Krimm R. Development of an analytical 3D simulation model of the levelling process. Journal of Materials Processing Technology. 2011. Vol. 211, Iss. 6. pp. 1060–1068.
9. Kaiser R., Hatzenbichler T., Buchmayr B., Antretter T. Simulation of the roller straightening process with respect to residual stresses and the curvature trend. Materials Science Forum. 2014. Vol. 768. pp. 456–463.
10. Garber E. A., Bolobanova N. L., Trusov K. A. Modeling and study of the design parameters of roller straightening machines. Scientific and technical progress in ferrous metallurgy – 2017 : Proceedings of the III International Scientific Conference, Cherepovets, October 19–20, 2017. Cherepovets : Cherepovets State University, 2017. pp. 63–69.
11. Trusov K. A., Mishnev P. A., Garber E. A., Bolobanova N. L. et al. Investigation of blank bow defect after roller leveller by finite element analysis. Journal of Physics: Conf. Series. 2018. Vol. 1063. 012192.
12. Maksimov E. A. Development of a mathematical model for calculating the parameters of straightening profiles on a roller straightening machine. Chernaya metallurgiya. Byulleten nauchno-tekhnicheskoy i ekonomicheskoy informatsii. 2020. Vol. 76. No. 7. pp. 721–727.