OBRABOTKAMETALLOV Vol. 27 No. 2 2025 101 TECHNOLOGY References 1. Östling D., Brede P.K., Jensen T., Bjønnum R., Standal O., Sæthertrø P.I., Holmström O.B.T. Real-time compensation of tool defl ection using a sensor embedded boring bar with wireless signal feedback to the machine tool controller. 9th CIRP Conference on High Performance Cutting (HPC 2020), 2021, vol. 101, pp. 102–105. DOI: 10.1016/j.procir.2020.09.191. 2. Chernoivanova A.G., Tarasenko B.F., Os’kin S.V. Resursosberegayushchee ustroistvo dlya rastochki korpusnykh otverstii [Resource-saving device for boring hull holes]. Chrezvychainye situatsii: promyshlennaya i ekologicheskaya bezopasnost’ = Emergencies: industrial and environmental safety, 2015, no. 2–3, pp. 81–88. 3. Maslov A.R., Molodtsov V.V. Modelirovanie kolebanii instrumental’noi sistemy dlya rastachivaniya otverstii [Vibration simulation tooling system for boring]. Vestnik MGTU “Stankin” = Vestnik MSTU “Stankin”, 2014, no. 4, pp. 196–199. Ensuring hole shape accuracy in fi nish machining using boring Vadim Stelmakov a, *, Mikhail Gimadeev b, Aleksandr Nikitenko c Paci fi c National University, 136 Tihookeanskaya St., Khabarovsk, 680035, Russian Federation a https://orcid.org/0000-0003-2763-1956, 009062@togudv.ru; b https://orcid.org/0000-0001-6685-519X, 009063@togudv.ru; c https://orcid.org/0000-0003-4729-5558, 005392@togudv.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. 2 pp. 89–102 ISSN: 1994-6309 (print) / 2541-819X (online) DOI: 10.17212/1994-6309-2025-27.2-89-102 ART I CLE I NFO Article history: Received: 02 February 2025 Revised: 25 February 2025 Accepted: 27 March 2025 Available online: 15 June 2025 Keywords: Shape accuracy Radial displacement cut layer area Boring Finishing Funding This work has funded by the Ministry of science and higher education of Russian Federation (project № FEME– 2024–0010). ABSTRACT Introduction. In modern manufacturing, hole processing is one of the more labor-intensive operations. The presence of a large number of body parts with high-precision holes, which are subject stringent accuracy requirements regarding parameters such as size, shape and axis location, contributes to the complexity of their machining. Achieving these accuracy specifi cations often requires a diverse range of tools and multipurpose machining. Currently, there are numerous methods for hole processing, and boring is a key one for achieving high levels of accuracy. However, despite the many advantages of this method in achieving diametrical size accuracy, the shape deviation of the resulting holes has not been suffi ciently investigated. The subject. The paper analyzes the main technological parameters of the hole boring process, and establishes their relationship with hole shape indicators, such as deviation from roundness and cylindricity. The study includes the development of an approach to predict error magnitude, considering the kinematics and dynamics of the machining process. The purpose of the work is to predict the radial displacement of the tool axis and to develop methods for ensuring the accuracy of the hole shape in fi nishing operations using boring. The main tasks of the present study involve establishing dependencies between technological processing parameters and the values of deviations from roundness and cylindricity, as well as determining the magnitude of the radial displacement of the tool to enable error magnitude prediction. Method and methodology. Methods for measuring deviations from roundness and cylindricity are considered, and their advantages and disadvantages are presented. Special attention is given to determining the infl uence of key factors during machining using frequency analysis method, which allows for evaluation the quality and reliability of the measurements performed. The hardware used for the experimental studies, along with the selected materials and processing modes, is described. Results and discussion. This paper examines the main factors aff ecting the accuracy of the hole shape obtained by boring. The application of the developed algorithms and models enables engineers to select optimal processing parameters based on the specifi ed functional accuracy requirements of the hole, thereby ensuring the required shape accuracy. For citation: Stelmakov V.A., Gimadeev M.R., Nikitenko A.V. Ensuring hole shape accuracy in fi nish machining using boring. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science, 2025, vol. 27, no. 2, pp. 89–102. DOI: 10.17212/1994-6309-2025-27.2-89-102. (In Russian). ______ * Corresponding author Stelmakov Vadim A., Ph.D. (Engineering), Associate Professor Pacifi c National University, 136 Tihookeanskaya st., 680035, Khabarovsk, Russian Federation Tel.: +7 962 221-74-60, e-mail: 009062@togudv.ru
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