OBRABOTKAMETALLOV Vol. 27 No. 3 2025 34 TECHNOLOGY Infl uence of cutting speed on pulse changes in the temperature of the front cutter surface during turning of heat-resistant steel 0.17 C-Cr-Ni-0.6 Mo-V Valery Gvindjiliya a, *, Evgeny Fominov b, Andrey Marchenko c, Tatiana Lavrenova d, Svetlana Debeeva e Don State Technical University, 1 Gagarin square, Rostov-on-Don, 344000, Russian Federation a https://orcid.org/0000-0003-1066-4604, vvgvindjiliya@donstu.ru; b https://orcid.org/0000-0002-0165-7536, fominoff 83@mail.ru; с https://orcid.org/0000-0003-4028-6712, tobago13@yandex.ru; d https://orcid.org/0000-0002-8283-7730, bys_ka87@mail.ru; e https://orcid.org/0000-0002-2796-2424, sve_tchk@mail.ru Obrabotka metallov - Metal Working and Material Science Journal homepage: http://journals.nstu.ru/obrabotka_metallov Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science. 2025 vol. 27 no. 3 pp. 23–36 ISSN: 1994-6309 (print) / 2541-819X (online) DOI: 10.17212/1994-6309-2025-27.3-23-36 ART I CLE I NFO Article history: Received: 13 April 2025 Revised: 25 April 2025 Accepted: 21 May 2025 Available online: 15 September 2025 Keywords: Longitudinal turning Heat-resistant steel Kinematic disturbance Front surface temperature ABSTRACT Introduction. This paper is devoted to the evaluation of the infl uence of periodic fl uctuations of machining mode parameters on the change of the maximum temperature of the front surface of the cutter. Subject of research. Fluctuations of cutting mode parameters are considered as deviations of their values relative to the nominal ones, resulting in periodic changes in the cross-sectional area of the cut layer and the interaction conditions between the chip and the tool’s front surface, which aff ect temperature changes in the cutting zone. The purpose of this work is to evaluate the infl uence of periodic fl uctuations of machining mode parameters at diff erent cutting speeds on the variation of the maximum temperature of the cutting tool’s front surface during turning of heat-resistant steel 0.17 C-Cr-Ni-0.6 Mo-V on a long-life machine without cooling. Method and methodology. The fi nishing longitudinal turning process of heat-resistant steel 0.17 C-Cr-Ni-0.6 Mo-V on a long-life machine without cooling was investigated. During machining, tool vibrations were measured along three coordinate axes while varying the cutting speed at constant depth of cut and feed. Using digital simulation modeling based on input data obtained from in-situ experiments, the moments in the system dynamics when each cutting mode parameter reaches extreme values due to fl uctuations were identifi ed. Deviations of the maximum design temperature from the corresponding nominal value were then determined. Results and discussion. It is established that variations in machining speed change the factors destabilizing the thermal state: at low speeds, the main sources of temperature deviations in the investigated cutting system are moments when extreme values of cutting depth and speed are reached; at higher speeds, fl uctuations of cutting depth and feed have the greatest eff ect. It is revealed that when machining parameters reach extreme values, instantaneous temperature generally increases, and cutting speeds at which such deviations are minimal are identifi ed. For citation: Gvindjiliya V.E., Fominov E.V., Marchenko A.A., Lavrenova T.V., Debeeva S.A. Infl uence of cutting speed on pulse changes in the temperature of the front cutter surface during turning of heat-resistant steel 0.17 C-Cr-Ni-0.6 Mo-V. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science, 2025, vol. 27, no. 3, pp. 23–36. DOI: 10.17212/1994-6309-2025-27.323-36. (In Russian). ______ * Corresponding author Gvindjiliya Valery E., Ph.D. (Engineering), Senior Lecturer Don State Technical University, 1 Gagarin square, 344000, Rostov-on-Don, Russian Federation Tel.: +7 918 583-23-33, e-mail: vvgvindjiliya@donstu.ru References 1. Komanduri R., Hou Z.B. Areview of the experimental techniques for the measurement of heat and temperatures generated in some manufacturing processes and tribology. Tribology International, 2001, vol. 34 (10), pp. 653–682. DOI: 10.1016/S0301-679X(01)00068-8. 2. Grzesik W. Experimental investigation of the cutting temperature when turning with coated indexable inserts. International Journal of Machine Tools and Manufacture, 1999, vol. 39 (3), pp. 355–369. DOI: 10.1016/S08906955(98)00044-3.
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