Obrabotka Metallov 2020 Vol. 22 No. 1

OBRABOTKAMETALLOV Vol. 22 No. 1 2020 13 TECHNOLOGY Investigation of the Process of Automatic Control of Current Polarity Reversal in the Conditions of Hybrid Technology of Electrochemical Processing of Corrosion-Resistant Steels Mikhail Borisov 1, a , Dmitry Lobanov 1, b, * , Alexander Yanyushkin 1, c , Vadim Skeeba 2, d 1 I.N. Ulianov Chuvash State University, 15 Moskovsky Prospekt, Cheboksary, 428015, Russian Federation 2 Novosibirsk State Technical University, 20 Prospekt K. Marksa, Novosibirsk, 630073, Russian Federation a https://orcid.org/0000-0001-9084-1820, borisovmgou@mail.ru , b https://orcid.org/0000-0002-4273-5107, lobanovdv@list.ru , с https://orcid.org/0000-0003-1969-7840, yanyushkinas@mail.ru, d https://orcid.org/0000-0002-8242-2295, skeeba_vadim@mail.ru Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science. 2020 vol. 22 no. 1 pp. 6–15 ISSN: 1994-6309 (print) / 2541-819X (online) DOI: 10.17212/1994-6309-2020-22.1-6-15 Obrabotka metallov - Metal Working and Material Science Journal homepage: http://journals.nstu.ru/obrabotka_metallov ARTICLE INFO Article history : Received: 25 November 2019 Revised: 21 December 2019 Accepted: 20 January 2020 Available online: 15 March 2020 Keywords : Electrochemical grinding Programmable device Hybrid technology Automatic control Corrosion Resistant Steel Funding This work was fi nancially supported within the framework of the NSTU Research and Development Thematic Plan (project No. TP-PTM-1_20 project). Acknowledgements The studies were performed at the Col- lective use center “Structure, mechani- cal and physical properties of materi- als” NSTU for help in conducting joint research work. ABSTRACT Introduction. In various industries, heat-treated structural materials with enhanced physical and mechanical properties are increasingly used. Such materials include corrosion-resistant steels. These steels are used in mechanical engineering for the manufacture of parts and components of machines and mechanisms, in the petrochemical and gas processing industries, in the production and processing of food products, in pharmaceuticals for the manufacture of medical implements and equipment, and in medicine for the manufacture of prostheses. In modern production, along with traditional methods of intensi fi cation of technological operations, a direction is developing to increase the ef fi ciency of machining by temporarily reducing the strength of the processed material, changing the mechanism of contact processes that occur on the working surfaces of tools and in the contact surface layer of the processed work pieces. In this case, combined and hybrid processing technologies are used. For processing complex products, it is possible to use a hybrid technology of electrochemical processing, in which periodic electrochemical dressing of the diamond wheel is carried out by changing the polarity of the current fl owing along the chain directly during grinding without using an additional tool dressing chain. One of the main problems hindering the wide practical application of hybrid and combined technologies in industry is that to implement these technologies, equipment is needed that combines the main type of machining with additional energy sources, which can operate in automatic mode. This leads to the need to create special control systems for organizing hybrid and combined technologies in automated production conditions. Purpose of work is to increase the ef fi ciency of hybrid technology for the electrochemical treatment of corrosion-resistant steels due to automatic control of the change in current polarity. Results and discussion . To accomplish this task, a programmable device for automatically controlling the reversal of current polarity in an electric circuit is developed and manufactured. It can implement two operating modes in turn. The fi rst mode is electrochemical grinding of the part. The second mode is the electrochemical dressing of the diamond wheel. The study of the process of electrochemical grinding of samples made of 12Kh18N10T steel and electrochemical dressing of a diamond tool using a device for automatically controlling the change in current polarity is carried out on an original bench. To assess the quality parameters of the treated surface, the microhardness of the processed samples is measured on an HMV-G21S microhardness meter, the microrelief of the samples obtained using an AFM Solver Next scanning probe microscope is measured, and the surface roughness is measured on a Model 130 pro fi lometer. Analysis of the results of the study suggests that the use of programmable device allows automating the process of controlling the change in polarity of the electric current without reducing the quality of surface grinding in hybrid technology of electrochemical treatment. For citation: Borisov M.A., Lobanov D.V., Yanyushkin A.S., Skeeba V.Yu. Investigation of the Process of Automatic Control of Current Polarity Reversal in the Conditions of Hybrid Technology of Electrochemical Processing of Corrosion-Resistant Steels. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science , 2020, vol. 22, no. 1, pp. 6–15. DOI: 10.17212/1994-6309- 2020-22.1-6-15. (In Russian). ______ * Corresponding author Lobanov Dmitry V. , D.Sc. (Engineering), Associate Professor I.N. Ulianov Chuvash State University, 15 Moskovsky Prospekt, 428015, Cheboksary, Russian Federation Tel.: + 7-908-303-47-45, e-mail: lobanovdv@list.ru