OBRABOTKAMETALLOV Vol. 26 No. 3 2024 technology of 15–30 km/h, thus ensuring the removal of metal with a thickness of 0.2–0.3 mm at increased operating speeds. 3. The electric motor shaft rotates steadily, evenly, without seizures and noises in all grinding modes. The electric motor withstands the radial shaft load (up to 3 kN) distributed along the length of the output end of the shaft and the axial shaft load up to 3 kN. 4. The optimum current loads of operation of the high-speed electric motor depending on the grinding speed are established. 5. The values of pressure in the pneumatic system of pressing the grinding wheel to the rail to ensure optimal current loads are established. 6. The research results will be used in the design of rail grinding train RSHP 2.0, which implements high-speed grinding technology. References 1. Funke H. Rail grinding. Berlin, Transpress, 1986. 153 p. 2. Fan W., Liu Y., Li J. Development status and prospect of rail grinding technology for high speed railway. Journal of Mechanical Engineering, 2018, vol. 54 (22), pp. 184–193. DOI: 10.3901/JME.2018.22.184. 3. Schoch W. Grinding of rails on high-speed railway lines: a matter of great importance. Rail Engineering International, 2007, vol. 36 (1), pp. 6–8. 4. Abdurashitov A.Yu., Sukhov V.V. Vliyanie ispol’zovaniya rel’soshlifoval’nykh poezdov na prodlenie zhiznennogo tsikla rel’sa [The impact of the use of rail-grinding trains on the prolongation of the rail life cycle]. Put’ i putevoe khozyaistvo = Railway Track and Facilities, 2023, no. 8, pp. 20–22. 5. Suslov A.G., Bishutin S.G., Zakharov L.A. Innovatsionnye tekhnologii rel’soobrabotki vysokoskorostnykh zheleznykh dorog [Innovation technologies of rail working for high-speed railways]. Naukoemkie tekhnologii v mashinostroenii = Science Intensive Technologies in Mechanical Engineering, 2020, no. 8, pp. 11–17. DOI: 10.30987/2223-4608-2020-8-11-17. 6. Verma S., Joseph Selvi B., Yogesh Shah V. Influence of rail grinding operations on the World’s Largest Multimodal Network. International Conference on Advances in Design, Materials, Manufacturing and Surface Engineering for Mobility. SAE Technical Paper. SAE International, 2022. DOI: 10.4271/2022-28-0560. 7. Liu P., Zou W., Peng J., Xiao F. Investigating the effect of grinding time on high-speed grinding of rails by a passive grinding test machine. Micromachines, 2022, vol. 1, p. 2118. DOI: 10.3390/mi13122118. 8. Ilyinykh A.S. Skorostnoe shlifovanie rel’sov v puti [Speed rail grinding]. Mir transporta = World of Transport and Transportation, 2011, no. 3, pp. 56–61. 9. Khvostikov A.S. Povyshenie effektivnosti skorostnogo shlifovaniya rel’sov v puti [Improving the efficiency of high-speed grinding of rails in transit]. Sovremennye naukoemkie tehnologii = Modern High Technologies, 2023, no. 5, pp. 30–35. 10. Taubert M., Pyushel’ A. Skorostnoe shlifovanie rel’sov [High-speed grinding of rails]. Zheleznye dorogi mira, 2010, no. 7, pp. 31–33. (In Russian). 11. Zenga W., Lib Z., Peib Z., Treadwell C. Experimental observation of tool wear in rotary ultrasonic machining of advanced ceramics. International Journal of Machine Tools and Manufacture, 2005, vol. 45 (12– 13), pp. 1468–1473. 12. Doman D., Warkentin A., Bauer R. A survey of recent grinding wheel topography models. International Journal of Machine Tools and Manufacture, 2006, vol. 46, pp. 343–352. DOI: 10.1016/j.ijmachtools.2005.05.013. 13. Ostrovskii V.I. Teoreticheskie osnovy protsessa shlifovaniya [Theoretical basis of the grinding process]. Leningrad, LGU Publ., 1981. 143 p. 14. Koshin A.A., Chaplygin B.A., Isakov D.V. Adequacy of the operating conditions of abrasive grains. Russian Engineering Research, 2011, vol. 31 (12), pp. 1221–1226. 15. Ilinykh A.S., Pikalov A.S., Miloradovich V.K., Galay M.S. Experimental studies of high-speed grinding rails modes. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science, 2023, vol. 25, no. 3, pp. 19–35. DOI: 10.17212/1994-6309-2023-25.3-19-35. (In Russian). 16. IlinykhA.S.,PikalovA.S.,GalayM.S.,MiloradovichV.K.Povyshenieproizvoditel’nosti rel’soshlifoval’nykh poezdov metodom skorostnogo shlifovaniya [Increasing the performance of rail grinding trains by the method of speed grinding]. Izvestiya vysshikh uchebnykh zavedenii. Severo-Kavkazskii region. Tekhnicheskie nauki =
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