Kudryashov E.A. et al. 2018 Vol. 20 No. 1

OBRABOTKAMETALLOV Vol. 20 No. 1 2018 42 EQUIPMENT. INSTRUMENTS References 1. Kudryashov E.A., Smirnov I.M. Skorostnoe frezerovanie rez’by vrashchayushchimisya reztsami [High-speed milling of the thread by rotating cutters]. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science , 2013, no. 1 (58), pp. 4–8. 2. Kudryashov E.A., Smirnov I.M. Effektivnaya rabota instrumenta iz kompozita pri skorostnom frezerovanii rez’by [Efficient tool of composite at high-speed thread milling]. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science , 2013, no. 2 (59), pp. 25–32. 3. Song S., Zuo D. Modelling and simulation of whirling process based on equivalent cutting volume. Simulation Modelling Practice and Theory , 2014, vol. 42, pp. 98–106. doi: 10.1016/j.simpat.2013.12.011. 4. Stahl J.E. Metal cutting – theories and models . Lund, Sweden, Lund University Press, 2012. 580 p. 5. Vos P. de. Applied metal cutting physics – best practice . Fagersta, SECO Tools AB, 2016. 163 p. 6. Altintas Y. Manufacturing automation: metal cutting mechanics, machine tool vibrations, and CNC design . New York, Cambrdige University Press, 2012. 366 p. Increase of Efficiency of the Internally Cutting Mill with Composite Cutters when Cutting Trapezoidal Thread with Interrupted Elements Evgenii Kudryashov a, * , Tatyana Kameneva b Southwest State University, 50 Let Oktyabrya Street, 94, Kursk, 305040, Russian Federation a https://orcid.org/0000-0002-1627-1919 , kea-swsu@mail.ru , b http://orcid.org/0000-0002-9187-3039 , taska015@mail.ru Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science. 2018 vol. 20 no. 1 pp. 33–43 ISSN: 1994-6309 (print) / 2541-819X (online) DOI: 10.17212/1994-6309-2018-20.1-33-43 Obrabotka metallov - Metal Working and Material Science Journal homepage: http://journals.nstu.ru/obrabotka_metallov ARTICLE INFO Article history : Received: 20 November 2017 Revised: 31 January 2018 Accepted: 15 February 2018 Available online: 15 March 2018 Keywords : Spiral surface Interrupted element Cutter Shock Cutter power Machining method ABSTRACT Purpose: to increase the efficiency of the internally cutting mill due to the developed method of setting the cutters to the calculated values of the angles of shock-free cutting. This allows expanding the technological capabilities of the fragile cutting tool material when cutting trapezoidal thread with the interrupted elements. An analysis of the stress-related characteristics of cutting tool materials of a group of composites is made. The paper shows that the main reason for the low efficiency of cutting elements of the internally cutting mill is the chipping of its cutting edges when inserting (output) the tool into the workpiece and passing through the interrupted elements of the thread, located on its surface. Methods: experimental studies are carried out on a lathe, with the installation on its support of a special device for threading, equipped with a replaceable internally cutting mill, having a set of thread cutters, the cutting part of which is made of a composite material. The quality of the machined thread surface and the accuracy of the execution are controlled by optical method using standard and special measuring instruments. Results and discussion: the rational values of the geometry of the cutting element and the cutting data of the trapezoidal thread by the internally cutting mill equipped with a set of composite cutting elements tuned for cutting into the workpiece with interrupted elements so that the meeting and thread formation occurred as a region of the front surface of the cutting element as far as possible from the cutting edges are presented. The use of the tuning method, protected by the Russian Federation patent, made it possible to increase the efficiency of the internally cutting mill and to extend the range of application of the composite tool material with interrupted cutting. For citation: Kudryashov E.A., Kameneva T.E. Increase of efficiency of the internally cutting mill with composite cutters when cutting trapezoidal thread with interrupted elements. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science , 2018, vol. 20, no. 1, pp. 33–43. doi: 10.17212/1994-6309-2018-20.1-33-43. (In Russian). ______ * Corresponding author Kudryashov Evgenii A. , D.Sc. (Engineering), Professor Scientific Research Engineering Institute, 6 Shosse Entuziastov, 143912, Balashikha, Moscow Region, Russian Federation Tel.: 8 (915) 339-99-29, e-mail: kea-swsu@mail.ru