Improving the efficiency of metal-bonded diamond abrasive end tools by improving manufacturing technology

OBRABOTKAMETALLOV Vol. 20 No. 3 2018 MATERIAL SCIENCE EQUIPMENT. INSTRUMENTS 3 2 21 Improving the efficiency of metal-bonded diamond abrasive end tools by improving manufacturing technology Valentin Smirnov 1, a , Dmitry Lobanov 1, b, * , Vadim Skeeba 2, c , Ivan Golyushov 1, 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/0000-0003-2721-9849, vms53@inbox.ru , b https://orcid.org/0000-0002-4273-5107, lobanovdv@list.ru , с https://orcid.org/0000-0002-8242-2295, skeeba_vadim@mail.ru , d https://orcid.org/0000-0001-9757-1368, ivan.golyushov.97@mail.ru Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science. 2021 vol. 23 no. 2 pp. 66–80 ISSN: 1994-6309 (print) / 2541-819X (online) DOI: 10.17212/1994-6309-2021-23.2-66-80 Obrabotka metallov - Metal Working and Material Science Journal homepage: http://journals.nstu.ru/obrabotka_metallov ARTICLE INFO Article history : Received: 14 March 2021 Revised: 27 March 2021 Accepted: 14 April 2021 Available online: 15 June 2021 Keywords : Abrasive tools Metal bond Condenser welding Tool design Technology Funding: This work was financially supported within the framework of the NSTU Research and Development Thematic Plan (project No. TP–PTM–1_21 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. Difficult-to-machine materials with enhanced physical and mechanical properties are increasingly being used in various industries. Such materials are used in mechanical engineering for the manufacture of parts and assemblies of machines and mechanisms, in the production and processing of food products where increased operational requirements are required. In modern production, along with traditional methods of intensifying technological operations, combined and hybrid processing technologies are used. For the finishing of products, abrasive grinding with a diamond tool is used. One of the problems hindering the wide practical application of this method in industry is the fact that it has a high prime cost caused by the cost of materials used in the manufacture and the laboriousness of the tool shaping process. This leads to the need to develop a new technology for manufacturing diamond tools . The purpose of the work is to increase the efficiency of the end diamond abrasive tool with a metal bond by using carbon steels as a body material, increasing the strength of the connection between the body and the diamond-bearing part, as well as choosing an effective tool manufacturing technology . Research methodology. To gain this task, a technology for manufacturing end diamond abrasive tools is developed and tested. Allowing using the technology of capacitor welding to connect the diamond-bearing part with the shank and use medium-carbon hardened high-quality steels with a hardness of 45-60 HRC as the shank material. The strength of the connection of the body with the working diamond-bearing part of the grinding head samples is determined by tensile testing on a 1958U10 tensile machine with maximum load 100 kN. The quality of the joint is assessed visually by the presence of discontinuities in the joint, as well as by examining the microstructure and measuring the microhardness of the weld and heat-affected zones. The microhardness of the welded joint is measured using an HMV-G21ST semi- automatic microhardness tester (Shimadzu, Japan) at a load of 50 g. Results and discussion. Thus, the results of comparative studies allow us to assert that the strength of the connection between the shank and the working diamond-bearing part according to the proposed technology surpasses similar characteristics of the strength of the connection between the shank and the diamond-bearing layer of grinding heads obtained by the method selected by the prototype. Conclusions . The proposed technology for the manufacture of diamond heads increases the strength of the connection between the body and the diamond-bearing working part, reduces the cost of manufacturing the grinding heads due to the use of hardened medium-carbon steels as the material of the tool body instead of high- speed steel grades, the technology is simplified and the possibility of automating the manufacture of tools appears . For citation: Smirnov V.M., Lobanov D.V., Skeeba V.Yu., Golyushov I.S. Improving the efficiency of metal-bonded diamond abrasive end tools by improving manufacturing technology. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science , 2021, vol. 23, no. 2, pp. 66–80. DOI: 10.17212/1994-6309-2021-23.2-66-80. (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 Introduction In the context of a modern economy, one of the fundamental indicators is the competitive advantage of products. In mechanical engineering, products that guarantee advanced performance characteristics of work-pieces, along with high quality characteristics, have often greater competitive advantage. Parts made