Influence of Cutting Dynamic on the Selection of the Technological Regimes to Ensure Minimal Wear of Cutting Tools

OBRABOTKAMETALLOV Vol. 22 No. 4 2020 67 EQUIPMENT. INSTRUMENTS References 1. Ryzhkin A.A. Sinergetika iznashivaniya instrumental’nykh materialov pri lezviinoi obrabotke [Synergetics of tool wear in blade processing]. Rostov-on-Don, Don state technical University Publ., 2019. 289 p. ISBN 9785789016695. 2. Starkov V.K. Fizika i optimizatsiya rezaniya materialov [Physics and optimization of cutting materials]. Moscow, Mashinostroenie Publ., 2009. 640 p. ISBN 978-5-94275-460-0. In fl uence of Cutting Dynamic on the Selection of the Technological Regimes to Ensure Minimal Wear of Cutting Tools Vilor Zakovorotny a , Valery Gvindjiliya b, * Don State Technical University, 1 Gagarin square, Rostov-on-Don, 344000, Russian Federation a https://orcid.org/0000-0003-2187-9897, vzakovorotny@dstu.edu.ru , b https://orcid.org/0000-0003-1066-4604, sinedden@yandex.ru Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science. 2020 vol. 22 no. 4 pp. 54–70 ISSN: 1994-6309 (print) / 2541-819X (online) DOI: 10.17212/1994-6309-2020-22.4-54-70 Obrabotka metallov - Metal Working and Material Science Journal homepage: http://journals.nstu.ru/obrabotka_metallov ARTICLE INFO Article history : Received: 14 August 2020 Revised: 28 August 2020 Accepted: 17 September 2020 Available online: 15 December 2020 Keywords : С utting ef fi ciency Nonlinear dynamic Self-organization Wear tool intensity Technological regimes Funding The reported study was funded by RFBR according to the research projects: “Development of the theory of analysis and synthesis of controlled self-organization in a dynamic cutting system during processing on the example of manufacturing parts on lathes”, No. 19-08-00022; “Development of methods for analysis and synthesis of a dynamic cutting system based on the criterion of minimizing the reduced manufacturing costs”, No. 20-38-90074. ABSTRACT Introduction. The intensity of tool wear, as an increment of wear to the cutting path, characterizes one of the important processing indicators. It is used in the development of algorithms for controlling the cutting process, including the calculation of trajectories in CNC machines. As the cutting speed increases, there is a value at which the wear rate is minimal. It corresponds to the optimal value of heat production in the cutting zone, that is, the power of irreversible transformations of the energy supplied to cutting. Heat production depends on the dynamic system parameters that change along the tool path. In this regard, at the initial stage and during processing, it is necessary to coordinate the control with the properties of the dynamic cutting system. Subject. The paper offers a study and analysis of the relationship between the tool wear rate and the dynamic properties of the cutting process, and on this basis, the de fi nition of technological modes in which the wear rate is minimal. The purpose of this work is to study the dependence of the tool wear rate on the initial and changing dynamic properties of processing along the path, and to create on this basis methods for matching technological modes with the current cutting dynamics to reduce the wear rate. Method and methodology of the work. In this paper, experimental and analytical methods are used to study the evolutionary changes in the properties of the system in relation to the development of tool wear. The developed mathematical models of the cutting system are presented, which differ from the known ones in that the power of irreversible energy transformations of the mechanical system in the interface of the back faces of the tool with the workpiece is additionally modeled. The dependence of the wear rate on the power of irreversible transformations, that is, on a given time interval in the increment of wear, is given. This takes into account the dependence of wear on the dynamic properties of the cutting system, including during its evolution. Results and discussions. It is shown that the properties of evolution are sensitive to small variations in the parameters of the dynamical system. These variations make signi fi cant changes in the wear rate. The paper reveals the dependence of wear on the properties of a dynamic system, that is, on its parameters, technological modes, beats, and other perturbations. Conclusions. The disclosure of the dependence of wear resistance on the dynamic properties of the cutting process characterizes new ideas about the factors that affect wear resistance. For citation: Zakovorotny V.L., Gvindjiliya V.E. In fl uence of cutting dynamic on the selection of the technological regimes to ensure minimal wear of cutting tools. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science , 2020, vol. 22, no. 4, pp. 54–70. DOI: 10.17212/1994-6309-2020-22.4-54-70. (In Russian). ______ * Corresponding author Gvindjiliya Valery E. , Post-graduate Student Don State Technical University, 1 Gagarin square, 344000, Rostov-on-Don, Russian Federation Tel.: +7 (918) 583-23-33, e-mail: sinedden@yandex.ru