Atapin V.G. et. al. 2019 Vol. 21 No. 1

OBRABOTKAMETALLOV Vol. 21 No. 1 2019 68 EQUIPMENT. INSTRUMENTS References 1. Lull B. Statische und dynamische berechnung von werkzeugmaschinengestellen. Maschinenbautechnik , 1977, vol. 26, no. 1, pp. 10–13. 2. Roscher A. Berechnung der dynamischen eigenschaften von werkzeugmaschinengestellen mit hilfe der methode der finiten elemente. Maschinenbautechnik , 1978, vol. 27, no. 4, pp. 156–160. 3. Kameswara Rao N.S.V. Foundation design: theory and practice . Singapore, John Wiley & Sons (Asia) Pte Ltd, 2011. 544 p. ISBN 978-0-470-82534-1. 4. Bhatia K.G. Foundations for industrial machines and earthquake effects. ISET Journal of Earthquake Technology , 2008, vol. 45, no. 1–2, pp. 13–29. 5. Haug E.J., Choi K.K., Komkov V. Design sensitivity analysis of structural systems. Mathematics in Science and Engineering . Vol. 177. Orlando, Florida, Academic Press, 1986. 381 p. Improving the Technical Characteristics of Machining Center at the Design Stage Vladimir Atapin a, * Novosibirsk State Technical University, 20 Prospekt K. Marksa, Novosibirsk, 630073, Russian Federation a http://orcid.org/0000-0002-5030-6054, atapin.49@mail.ru Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science. 2019 vol. 21 no. 1 pp. 61–69 ISSN: 1994-6309 (print) / 2541-819X (online) DOI: 10.17212/1994-6309-2019-21.1-61-69 Obrabotka metallov - Metal Working and Material Science Journal homepage: http://journals.nstu.ru/obrabotka_metallov ARTICLE INFO Article history : Received: 14 September 2018 Revised: 12 February 2019 Accepted: 15 February 2019 Available online: 15 March 2019 Keywords : Machining center System carriers Design Finite element method ABSTRACT Introduction. The development of optimal technical characteristics of machine-tools at the design stage is a long-range objective of the machine-tool industry. To solve this problem, a technology for designing basic details of heavy machining center with using of the finite element method and optimization methods are proposed. The design procedure includes: 1) calculation of the system carriers with basic details of simple geometry (rod, plate, shell), 2) calculation of the base part to determine the required geometry of its cross section, 3) dynamic analysis of the machine-tool as a whole. The purpose of this work is to present the main results of the design of the system carriers of the heavy machining center of a drilling, milling and boring group. Results and discussion. At the design stage of the system carriers, the adequate overall dimensions of the base parts and the boundary conditions (force and deformation) in the areas of its contact are determined. At the second stage, a separate basic part of the actual layout is explored using the column as an example with the selection of a small fragment in the contact zone of the column and the spindle head. It is shown that the calculated field of displacements of the nodes of the column fragment is adequate to the field of displacements of the corresponding nodes of the column, obtained by calculating it as part of the system carriers. As a result of the optimization, the torsional stiffness of the column is increased by 48%. To study the dynamics of the machine, a dynamic model is built and comparative calculations with forced oscillations of the machine is carried out. For a machine with optimal base parts, there is a reduction in compliance by 30% in the direction of the greatest component of the cutting force and a decrease in mass by 17% in comparison with the serial version. For citation: Atapin V.G. Improving the technical characteristics of machining center at the design stage. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science , 2019, vol. 21, no. 1, pp. 61–69. doi:10.17212/1994-6309-2019-21.1- 61-69. (In Russian). ______ * Corresponding author Atapin Vladimir G. , D.Sc. (Engineering), Professor Novosibirsk State Technical University, 20 Prospect K. Marksa, 630073, Novosibirsk, Russian Federation Tel.: 8 (383) 346-17-77 , e-mail: atapin@mail.ru