Sevastopol State University, Sevastopol, Russia

S. M. Bratan, Dr. Eng., Prof., Head of the Dept. of Mechanical Engineering Technology, e-mail: serg.bratan@gmail.com
N. I. Pokintelitsa, Dr. Eng., Prof., Dept. of Mechanical Engineering Technology, e-mail: NIPokintelitsa@sevsu.ru
A. O. Kharchenko, Cand. Eng., Prof., Dept. of Mechanical Engineering Technology, e-mail: khao@list.ru

Crimean State Engineering Pedagogical University, Simferopol, Russia
Ch. F. Yakubov, Cand. Eng., Rector of the University, e-mail: rector@kipu-rc.ru

The features of the process of thermofriction processing of metals with disk tools are considered. Insufficient knowledge of it and a large number of factors influencing shaping pose the task of creating the necessary conditions for meeting modern requirements for the quality of products, in particular, the required parameters of waviness of the processed surface. To purposefully select the parameters of vibration movements of a part, mathematical modeling of table movements when exposed to random loads caused by cutting forces was carried out. In this case, a change in the vibrating table rigidity within a wide range changes the natural frequency of vibrations, and, accordingly, the waviness of the treated surface. A relation has been established between the spectral characteristics of vibrations of the elements of the machine tool technological system and the spectrum of the machined surface waviness. The use of special dampers for the tool significantly changes the resonant properties of the dynamic thermal friction processing system. By choosing the proposed optimal parameters of the dampers, resonant vibrations of the tool are eliminated, which has a positive effect on the treatment process and reduces surface waviness. In this case, the structure of the surface layer of a part made of steel 45 changes at a depth of up to 0.6–1.0 mm (up to 0.2 mm there is a finely dispersed structure of the troostite type, ferrite appears in deeper layers, and then there is a consistent transition to pearlite-ferrite core structure). As a result, the hardness of the surface layer is 1.3–1.5 times higher than the hardness of the core of the workpiece.

1. Nasad T. G., Ignatiev A. A. High-speed processing of difficult-to-cut materials with additional energy flows in the cutting zone. Saratov : Izdatelstvo Saratovskogo gosudarstvennogo tekhnicheskogo universiteta, 2002. 110 p.
2. Gik L.A. Rotational cutting of metals. Kaliningrad: Knizhnoe izdatelstvo, 1990. 254 p.
3. Zarubitsky E. U. Thermofriction treatment of flat surfaces of steels. Kuibyshev : Kuibyshevskoe knizhnoe izdatelstvo, 1988. 42 p.
4. Sherov K., Kuanov I., Imanbaev Ye., Mussayev M. et al. The investigation and improvement of the hardness of the clad surface by thermal friction milling methods. International Journal of Mechanical Engineering and Robotics Research. 2022. Vol. 11, Iss. 10. pp. 784–792. DOI: 10.18178/ijmerr.11.10.784-792
5. Zahaf M. Z., Benghersallah M., Amirat A. Surface roughness and vibration analysis in end milling of annealed and hardened bearing steel. The International Journal of Advanced Manufacturing Technology. 2020. Vol. 111. pp. 525–535. DOI: 10.1016/j.measen.2020.100035
6. Momeni A., Arabi H., Rezaei A., Badri H. et al. Hot deformation behavior of austenite in HSLA-100 microalloyed steel. Materials Science and Engineering: A. 2011. Vol. 528. Iss. 4-5. pp. 2158–2163. DOI: 10.1016/ j.msea.2010.11.062
7. Sipos K., Lopez M., Trucco M. Surface martensite white layer produced by adhesive sliding wear friction in AISI 1065 steel. Rev Latinoam Metal Mater. 2008. Vol. 28, Iss. 1. pp. 46–50.
8. Bannikov A. I., Bannikov A. A., Kurchenko A. I., Dyatlov N. A. et al. Increasing the efficiency of thermofriction cutting of rolled pipes. STIN. 2010. No. 10. pp. 34–37.
9. Zarubitsky E. U. Development and research of the process of efficiency of thermofriction processing of materials. Kiev : VIPOL, 1993. 76 p.
10. Sizy Yu. A. Theory and practice of friction cutting. Kharkov : KhPI, 1995. 333 p.
11. Volkov O. A. Study of the influence of thermofriction processing on the stress state in 15Kh11МF steel. Vestnik NTU "KhPI". 2005. Iss. 12. pp. 84–88.
12. Nasad T. G. Surface quality after high-speed heat treatment. Mechanical engineering technology. 2004. Vol. 3, Iss. 27. pp. 11–13.
13. Pokintelitsa N. I., Strelyanaya Yu. O., Bratan S. M. Plastic deformation during thermofriction processing of materials. Uchenye zapiski Krymskogo inzhenerno-pedagogicheskogo universiteta. 2022. No. 3 (77). pp. 188–190. DOI: 10.34771/UZCEPU.2022.77.3.036
14. Kharchenko A. O., Bratan S. M., Kharchenko A. A. et al. Workshop on research activities in mechanical engineering. Moscow : Tsentrkatalog, 2022. 288 p.
15. Bratan S. M., Levchenko E. A., Pokintelitsa N. I. Automatic control of machining processes. Moscow : INFRA-М, 2018. 228 p.
16. Karpenko V. A., Voloshina N. A., Volkov S. P. Interchangeability, standardization and technical measurements. Sevastopol : Izdatelstvo SevNTU, 2007. 372 p.
17. Pokintelitsa N. I., Bratan S. M. Features of contact interaction between the tool and workpiece in the zone of thermofriction cutting of steels. Vestnik sovremennykh tekhnologiy. 2022. No. 3 (27). pp. 37–43.