Obrabotka Metallov 2019 Vol. 21 No. 1

OBRABOTKAMETALLOV Vol. 21 No. 1 2019 58 EQUIPMENT. INSTRUMENTS References 1. Smirnov N.N. Zubofrezerovanie mnogozakhodnymi chervyachnymi frezami s razlichnymi skhemami rezaniya . Avtoref. diss. kand. tekhn. nauk [Gear milling by much screw worm mills with different schemes of cutting. Author’s abstract of PhD eng. sci. diss.]. Kiev, 1982. 2. Nichkov A.G., Shunaev B.K. [Influence of the scheme of cutting at gear milling on wear of teeths of a worm mill]. Tezisy dokladov Vtoroi nauchno-tekhnicheskoi konferentsii Ural’skogo politekhnicheskogo instituta [Proceedings of the Second Scientific and Technical Conference of the Ural Polytechnic Institute]. Sverdlovsk, 1968. (In Russian). Modelling by a Method of Finite Elements for Determination of Stress-Deformed State in Retrofittable Hob Cutter with Indexable Inserts Dmitrij Vasilega a , Vitalii Kireev b , Vitaliy Zyryanov c, * Tyumen Industrial University, 38 Volodarskogo, Tyumen, 625000, Russian Federation a https://orcid.org/0000-0001-7618-7906, d_vasilega@mail.ru , b https://orcid.org/0000-0003-2285-1036, kireevvv@tyuiu.ru , c https://orcid.org/0000-0002-8191-3930, zyrjanovva@tyuiu.ru Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science. 2019 vol. 21 no. 1 pp. 50–60 ISSN: 1994-6309 (print) / 2541-819X (online) DOI: 10.17212/1994-6309-2019-21.1-50-60 Obrabotka metallov - Metal Working and Material Science Journal homepage: http://journals.nstu.ru/obrabotka_metallov ARTICLE INFO Article history : Received: 11 October 2018 Revised: 23 January 2019 Accepted: 29 January 2019 Available online: 15 March 2019 Keywords : Gear milling Hard alloy Assembly hob gear Stress-deformed condition of cutting elements ABSTRACT Introduction. Tooling equipment plays a major role for machine-building enterprises. The most important part in equipping the metal-cutting tool is the replacement of the cutting part from the group of high-speed steels by the cutting part made of hard alloy, which in turn gives an increase in durability and overall performance of the cutting tool. When cutting power of the tool increases then its changeability decreases. That is the reason why it is more rational to use complete approach which takes into account designing of a tool using a hard alloy WC–Co. Designing, production and test of gear cutting tools, development of cutting modes should be carried out in relation to a particular workpiece and its material. The purpose of the work: to study the influence of the geometry of the removable insert on distribution of dangerous tensile stresses. The paper studies the results of the calculation of the stress-strain state in a removable plate made of a WC-Co material. Tension and compression zones are observed on the main cutting edge. The concentration of dangerous tension stresses is located in the transition zone between the straight side cutting edge and the top, since there is the greatest constraint on cutting in this zone. Accordingly, the greatest destruction will occur in this zone. It is important that in this part of the cutting edge there will be the largest wear on the back surface. The research methods: ANSYS finite-element analysis program is used to detect dangerous tensile stresses  1 . Results and Discussion. Analysis of the stress distribution isolines showed that tensile stresses along the front surface of the removable cutting insert are reduced due to the fact that each removable cutting insert cuts off its part of the material. First, a narrowed cutting insert enters the work, which cuts off the metal with the upper part of the cutting insert, and then an understated cutting insert operates, which works with side cutting edges. As a result of the study, it was found that with a progressive cutting scheme, compared to the standard one, in which the original profile of the counterpart rack was made according to DIN3972 during gear milling, dangerous tensile stresses in cutting carbide plates are significantly reduced. For citation: Vasilega D.S., Kireev V.V., Zyryanov V.A. Modelling by a method of finite elements for determination of stress-deformed state in retrofittable hob cutter with indexable inserts. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science , 2019, vol. 21, no. 1, pp. 50–60. doi:10.17212/1994-6309-2019-21.1-50-60. (In Russian). ______ * Corresponding author Zyryanov Vitaliy A., Ph.D. (Engineering) student, Tyumen Industrial University 38 Volodarskogo, Tyumen, 625000, Russian Federation Тел.: 8 (919) 924-07-89, e-mail: zyrjanovva@tyuiu.ru