Obrabotka Metallov 2018 Vol. 20 No. 2

OBRABOTKAMETALLOV Vol. 20 No. 2 2018 32 TECHNOLOGY References 1. Polevoi G.V., Sukhinin G.K. Gazoplamennaya obrabotka metallov [Gas flame processing of metals]. Moscow, Akademiya Publ., 2005. 336 p. ISBN 5-7695-1604-6. 2. Sukhinin G.K. Rezka metallov bol’shoi tolshchiny [Cutting of metals of large thickness]. Moscow, Mashinostroenie Publ., 1983. 39 p. 3. Polevoi G.V., Sukhinin G.K. Plamennaya i gazotermicheskaya obrabotka materialov [Flame and gas-thermal processing of materials]. Moscow, Mashinostroenie Publ., 1993. 335 p. ISBN 5-217-01455-5. 4. Grigor’yants A.G., Sokolov A.A. Lazernaya rezka metallov [Laser cutting of metals]. Moscow, Vysshaya shkola Publ., 1988. 127 p. Evaluation of Technological Schemes of High Precision Plasma Cutting of Metallic Materials and its Compositions Kharis Rakhimyanov a, * , Alexander Loktionov b , Andrey Rakhimyanov c , Nadezhda Gaar d Novosibirsk State Technical University, 20 Prospect K. Marksa, Novosibirsk, 630073, Russian Federation a http://orcid.org/0000-0003-2781-0225, kharis51@mail.ru , b http://orcid.org/0000-0003-1168-6688 , pushkin-lok@mail.ru , c http://orcid.org/0000-0003-3805-0874, centerfht@mail.ru, d http://orcid.org/0000-0001-8517-658X , lianelas@mail.ru Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science. 2018 vol. 20 no. 2 pp. 18–34 ISSN: 1994-6309 (print) / 2541-819X (online) DOI: 10.17212/1994-6309-2018-20.2-18-34 ARTICLE INFO Article history : Received: 14 March 2018 Revised: 30 March 2018 Accepted: 25 April 2018 Available online: 15 June 2018 Keywords : Blank production High-precision plasma cutting Cutting accuracy Bimetallic composition ABSTRACT Introduction. Continuous improvement of materials cutting methods provides the appearance of new modi- fications of technological processes of blanking production, in particular, high precision plasma cutting. However, the equipment manufacturers accompany the proposed technologies with recommendations of processing modes, which are indicative and intended for a certain range of processed materials. The purpose of the paper is to improve the technological schemes of high precision plasma cutting in terms of quantity evaluation of cutting accuracy and surface quality of cut for structural steels, including bimetallic compositions in a specified thickness range. Methods. The evaluation of the accuracy and quality of the cut is carried out in accordance with ISO 9013: 2002. The steel ST3SP and the bimetallic composition “steel ST3 + steel 12H18N10T”, formed by explosion welding are chosen as the study material. Results and discussion. It is established that when HiFocus technology is used for cutting the steel ST3 in the lower thickness range (3 mm), the precision of the cut is not ensured. To increase the accuracy of the cutting the transition to a smaller nozzle size is proposed in this technology. The application of HiFocus plus technology, which is distinguished by the additional swirling of swirling gases, makes it possible to cut materials in a wider range of thicknesses. However, at cutting thicknesses of 4…6 mm, there is an excess of the acceptable devia- tion of the cut perpendicularity at both its edges. To increase the accuracy of shaping, a reduction in cutting speed is necessary. The efficiency of using Hi Focus plus technology for cutting a bimetallic composition “steel ST3 + STEEL 12H18N10Т” is shown. The optimal cutting scheme is identified with the choice of ST3 steel as the front side. It is established that the maximum cutting accuracy for this composition is achieved at a cutting speed of 1.5 m/min. For citation: Rakhimyanov Kh.M., Loktionov A.A., Rakhimyanov A.Kh., Gaar N.P. Evaluation of technological schemes of high precision plasma cutting of metallic materials and its compositions. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science , 2018, vol. 20, no. 2, pp. 18–34. doi: 10.17212/1994-6309-2018-20.2-18-34 . (In Russian). ______ * Corresponding author Rakhimyanov Kharis M. , D. Sc (Engineering), Professor Novosibirsk State Technical University, 20 Prospect K. Marksa, 630073, Novosibirsk, Russian Federation Tel.: 8 (383) 346-11-88, e-mail: kharis51@mail.ru Obrabotka metallov - Metal Working and Material Science Journal homepage: http://journals.nstu.ru/obrabotka_metallov