Obrabotka Metallov 2020 Vol. 22 No. 3

OBRABOTKAMETALLOV Vol. 22 No. 3 2020 16 TECHNOLOGY References 1. Panner Selvam M., Ranjith Kumar P. Optimization kerf width and surface roughness in wirecut electrical discharge machining using brass wire. Mechanics and Mechanical Engineering, 2017, vol. 21, no. 1, pp. 37–55. 2. Anandakumar P.A., Molla B., Biruke F., Aravind S. Analysis of copper mixed kerosene servotherm in EDM of Monel 400. IOP Conference Series: Materials Science and Engineering , 2017, vol. 197, p. 012004. DOI: 10.1088/1757-899X/197/1/012004. 3. Che Nor C.M.H., Kasim M., Mohamad E., Ito T., Sulaiman M. Study on cutting parameter on kerf width using wire electrical discharge machining of Inconel 718. 24th Design Engineering Systems Division JSME Conference Japan Society of Mechanical Engineers , Tokushima, Japan, 2014, vol. 14–27. DOI: 10.13140/2.1.1814.7844. Ensuring the Accuracy of Wire-cutting EDM processing of Products made of Hard-to-Handle Materials Evgenii Shlykov a, * , Timur Ablyaz b , Karim Muratov c a https://orcid.org/0000-0001-8076-0509, Kruspert@mail.ru , b https://orcid.org/0000-0001-6607-4692, lowrider11-13-11@mail.ru , c https://orcid.org/0000-0001-7612-8025, Karimur_80@mail.ru Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science. 2020 vol. 22 no. 3 pp. 6–17 ISSN: 1994-6309 (print) / 2541-819X (online) DOI: 10.17212/1994-6309-2020-22.3-6-17 Obrabotka metallov - Metal Working and Material Science Journal homepage: http://journals.nstu.ru/obrabotka_metallov ARTICLE INFO Article history : Received: 29 April 2020 Revised: 13 May 2020 Accepted: 02 June 2020 Available online: 15 September 2020 Keywords : Wire-cutting electrical discharge machining Processing modes Tool electrode Processing accuracy Funding This work was supported by the Ministry of Science and Higher Education of the Russian Federation on state assignment FSNM-2020- 0028. ABSTRACT Introduction. In order to improve operational properties of the manufactured product range in engineering, materials, which have enhanced physical and mechanical properties, are used. The application of such materials makes it possible to manufacture the items of small dimensions, but with high functionality. When processing such materials, significant wear of the cutting tool occurs, and when processing items of complex profile, it is necessary to use additional equipment. These factors increase the cost of manufacturing suitable products. For the processing of such products, it is advisable to use electrophysical processing methods, one of which is the technology of wire- cutting electrodischarge maching (EDM). The paper is devoted to theoretical and regression modeling of the width of the cut during EDM difficult to process materials. Subjects of research are: the magnitude of the interelectrode gap, the accuracy of EDM hard-to-handle materials. The aim of the work is to increase the accuracy of the process of EDM complex products, made of hard-to-handle materials. Methods. Experimental studies are carried out according to the method of the classical experiment. For the experiments, an Electronica EcoCut wire-cutting EDM machine is used. The experiments are carried out in the middle processing mode: pulse turn-on time T on = 10 μs, pulse fill factor T au = 30 %, average voltage U = 75 V. The electrode tool is a brass wire having a diameter of 0.25 mm. The working fluid is distilled water. Results and Discussion. Theoretical and regression models are obtained for calculating the cutting width during EDM products made of hard-to-handle materials. The dependence of the parameter on the processing conditions and the physicomechanical properties of the material is shown. It is found that with varying fill factor Tau, the response function changes according to the quadratic dependence. The maximum value of the cutting width B = 350 μm is achieved at T au = 40 %, T on = 15 μs. Awork program is written, which gives opportunity to calculate the value of the cut width, as well as the amount of correction introduced into the work program to complete a suitable size. The accuracy of manufacturing the “stator margin plate” part is ensured. This technology is introduced in the production of oil-producing equipment. For citation: Shlykov E.S., Ablyaz T.R., Muratov K.R. Ensuring the accuracy of wire-cutting EDM processing of products made of hard-to- handle materials. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science , 2020, vol. 22, no. 3, pp. 6–17. DOI: 10.17212/1994-6309-2020-22.3-6-17. (In Russian). ______ Perm National Research Polytechnic University, 29 Komsomolsky prospekt, Perm, 614990, Russian Federation * Corresponding author Shlykov Evgenii S., Ph.D. (Engineering), Associate Professor Perm National Research Polytechnic University, 29 Komsomolsky prospekt, 614990, Perm, Russian Federation Tel.: 8 (342) 2-198-324 , e-mail: Kruspert@mail.ru