Rechenko D.S. 2019 Vol. 21 No. 2

ОБРАБОТКА МЕТАЛЛОВ Том 21 № 2 2019 24 ТЕХНОЛОГИЯ The Study of the Process of Difficult-to-Machine Materials Cutting at the Micro-Level Denis Rechenko a, * Omsk State Technical University, 11 Mira ave., Omsk, 644050, Russian Federation a http://orcid.org/0000-0002-6776-6452, rechenko-denis@mail.ru Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science. 2019 vol. 21 no. 2 pp. 18–25 ISSN: 1994-6309 (print) / 2541-819X (online) DOI: 10.17212/1994-6309-2019-21.2-18-25 Obrabotka metallov - Metal Working and Material Science Journal homepage: http://journals.nstu.ru/obrabotka_metallov References 1. Denkena B., Biermann D. Cutting edge geometries. CIRP Annals – Manufacturing Technology , 2014, vol. 63 (2), pp. 631–653. DOI: 10.1016/j.cirp.2014.05.009. 2. Malekian M., Mostofa M.G., Park S.S., Jun M.B.G. Modeling of minimum uncut chip thickness in micro machining of aluminum. Journal of Materials Processing Technology , 2012, vol. 212, pp. 553–559. DOI: 10.1016/j. jmatprotec.2011.05.022. 3. Lucca D.A., Seo Y.W., Komanduri R. Effect of tool edge geometry on energy dissipation in ultraprecision machining. CIRP Annals – Manufacturing Technology , 1993, vol. 42, pp. 83–86. DOI: 10.1016/S0007- 8506(07)62397-X. 4. Woon K.S., RahmanM., Fang F.Z., Neo K.S., Liu K. Investigations of tool edge radius effect inmicromachining: a FEM simulation. Journal of Materials Processing Technology , 2008, vol. 195, pp. 204–211. DOI: 10.1016/j. jmatprotec.2007.04.137. ARTICLE INFO Article history : Received: 21 March 2019 Revised: 18 April 2019 Accepted: 25 April 2019 Available online: 15 June 2019 Keywords : Material cutting Finishing Carbide tools Quality ABSTRACT Introduction. The quality of the carbide cutting tool, characterized by sharpness (the usual inscribed radius of curvature of the blade), the size of microcracks and microshare, as well as the microhardness of the surfaces of the cutting wedge determines the quality of the treated surface and the final accuracy of the parts. The modern cutting tool together with technological system allows to receive accuracy of processing within 0.01...0.02 mm and the roughness of the treated surface R a = 0.32...0.63 μm. The purpose of the work is to study the cutting process of difficult-to-machine materials at the micro-level, to determine the performance of carbide tools in terms of the possibility of chip formation in the processing of small thickness of the cut layer Method. Amethod for studying the process of cutting difficult materials at the micro level (full-scale tests) with the use of high-quality carbide cutting tools obtained by a new method of ultra-high-speed sharpening is proposed. Results and discussion . The possibility of improving the efficiency of carbide cutting tools, which is understood in the work as a given dimensional accuracy of machining parts from hard materials in a few micrometers and a stable roughness of the treated surface with sufficient tool life, using high-quality tools obtained by high-speed sharpening is substantiated and experimentally confirmed. High-quality carbide cutting tools obtained by ultra-high-speed sharpening has prospects for use in aircraft and rocket-building enterprises in the manufacture of key high-precision parts from difficult materials. The conducted experiments on the study of the cutting process of difficult materials at the micro-level to determine the ratio of the thickness of the cut layer of the processed material to the conventional inscribed radius of rounding of the cutting tool blade, allow to determine its performance and determine the maximum dimensional accuracy of the blade processing. For citation: Rechenko D.S. The study of the process of difficult-to-machine materials cutting at the micro-level. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science , 2019, vol. 21, no. 2, pp. 18–25. DOI: 10.17212/1994-6309- 2019-21.2-18-25. (In Russian). ______ * Corresponding author Rechenko Denis S. , Ph.D. (Engineering), Associate Professor Omsk State Technical University, 11 Prospekt Mira, 644050, Omsk, Russian Federation Tel.: +7-913-631-46-74, e-mail: rechenko-denis@mail.ru