Optimizing the layout of a CNC lathe

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Abstract

A reasonable choice of machine layout is one of the ways to improve the quality of CNC machines and the result of a comprehensive analysis and consideration of many frequently conflicting requirements: accuracy, design feasibility, processability, productiveness, efficiency, safety, etc. The complexity of the choice of machine layout is associated with their diversity depending on the fact that machines with different designs of assembly units can have the same arrangement and, conversely, lathes with the same designs of main elements can have different layouts. Due to the multiple effects of layout on the accuracy characteristics of a machine, the optimal layout solution choice is the priority problem of machine building. The study covers the development of a technique for selecting a layout solution for the CNC lathes, which considers the random location of cutting zones and the existence of power factors related to the design and layout of a spindle unit. In the developed technique, as a criterion for choosing an optimal arrangement, the authors suggest using an accuracy layout criterion evaluated by the elastic deformations of a spindle in the cutting zone. The study resulted in analytical expressions for an objective function depending on two design variables: angles determining the location of a spindle pre-drive gear and a tool-holding group. The authors note that for the precision lathes when identifying spindle bearing radial stiffness, one should take into account the stiffness anisotropy of a housing bore for the spindle front support. For two specified design variables, the study shows the performance of a scanning method (complete enumeration for 322 points). Using this method and processing with Mathcad software, the authors obtained a possible variation range of values of specified angles for five standard layouts of spindle support bearings and limitations related to the minimization of elastic deformations of the tooling system.

About the authors

Aleksandr F. Denisenko

Samara State Technical University, Samara

Author for correspondence.
Email: sammortor@yandex.ru
ORCID iD: 0000-0001-6393-2831

Doctor of Sciences (Engineering), Professor, professor of Chair “Mechanical Engineering Technology, Machines and Tools”

Russian Federation

Roman G. Grishin

Samara State Technical University, Samara

Email: grg-s1@mail.ru
ORCID iD: 0000-0003-4511-9147

PhD (Engineering), Associate Professor, Head of Chair “Mechanical Engineering Technology, Machines and Tools”

Russian Federation

References

  1. Kulga K.S., Asbapov E.R., Kitaev A.A., Krivosheev I.A. Automated design of CNC machine tools using CAD/CAE systems. Vestnik MGTU Stankin, 2019, no. 2, pp. 63–68.
  2. Lekhmus M.Yu., Fetsak S.I., Amirov R.F. Structural synthesis of machinetool arrangements. STIN, 2016, no. 10, pp. 1–4.
  3. Akmaev O.K., Enikeev B.A. The enhancing of technological capabilities of multi-purpose turning group machines. Vestnik Ufimskogo gosudarstvennogo aviatsionnogo tekhnicheskogo universiteta, 2012, vol. 16, no. 4, pp. 18–23.
  4. Khusainov R.M., Ziangirova E.R., Lozinskiy V.V. Modeling of accuracy indicators of the techno-logical cutting system. Metalloobrabotka, 2020, no. 3, pp. 11–18.
  5. Belousov V.E., Gayduk A.V., Zolotarev V.N. On the problem of solving problems of multicriteria optimization. Sistemy upravleniya i informatsionnye tekhnologii, 2006, no. 3, pp. 34–41.
  6. Misyurin S., Kreynin G., Nelyubin A., Nosova N. Multicriteria Optimization of a Dynamic System by Methods of the Theories of Similarity and Criteria Importance. Mathematics, 2021, vol. 9, no. 22, article number 2854. doi: 10.3390/math9222854.
  7. Moumen S., Ouhimmou S. New multiobjective optimization algorithm using NBI-SASP approaches for mechanical structural problems. International Journal for Simulation and Multidisciplinary Design Optimization, 2022, vol. 13, article number 4. doi: 10.1051/smdo/2021037.
  8. Tong V.-C., Hwang J., Shim J., Oh J.-S., Hong S.-W. Multi-objective Optimization of Machine Tool Spindle-Bearing System. International Journal of Precision Engineering and Manufacturing, 2020, vol. 21, no. 10, pp. 1885–1902. doi: 10.1007/s12541-020-00389-7.
  9. Pini B.E., Zinovev D.A. Simulation of tooling sys-tem rigidity for estimation their influence on working accuracy. Izvestiya MGTU MAMI, 2008, no. 2, pp. 129–135.
  10. Starodubov V.S. Automatic changing of cutting tools on numerically controlled machine tools on the basis of turrets application. Izvestiya vysshikh uchebnykh zavedeniy. Mashinostroenie, 2012, no. 5, pp. 31–36.
  11. Alekhin A.G., Krylov E.G., Serdobintsev Yu.P. Increasing the contact rigidity of the attachment of the tail cutting tool. STIN, 2015, no. 5, pp. 7–11.
  12. Zakovorotnyy V.L., Fam D.T., Nguen S.T. Modeling of tool deformation offsetting to workpiece in turning. Vestnik Donskogo gosudarstvennogo tekhnicheskogo universiteta, 2010, vol. 10, no. 7, pp. 1005–1015.
  13. Lin Z., Tian W., Zhang D., Gao W., Wang L. A mapping model between the workpiece geometric tolerance and the end pose error of CNC machine tool considering structure distortion of cutting process system. Advances in Mechanical Engineering, 2021, vol. 13, no. 3, pp. 1–14. doi: 10.1177/16878140211004771.
  14. Dovnar S.S., Yakimovich A.M., Azhar A.V., Kuchinskaya A.A. FEM-analysis of the rigidity of a support of a heavy lathe in statics and dynamics. Mashinostroenie. Minsk, Belorusskiy natsionalnyy tekhnicheskiy universitet Publ., 2018, pp. 171–180.
  15. Bezyazychnyy V.F., Chumak P.V. Algorithm for determining the processing error due to the rigidity of the slider of a lathe-and-boring machine. Vestnik Rybinskoy gosudarstvennoy aviatsionnoy tekhnologicheskoy akademii im. P.A. Soloveva, 2018, no. 2, pp. 30–35.
  16. Vakulenko S.V. Design and calculation lathe tool holder with adjustable position of the center of rigidity. Sovremennye innovatsionnye tekhnologii podgotovki inzhenernykh kadrov dlya gornoy promyshlennosti i transporta, 2015, no. 1, pp. 62–72.
  17. Krylov E.G., Serdobintsev Yu.P. Povyshenie effektivnosti funktsio-nirovaniya instrumentalnykh sistem avtomatizirovannogo stanochnogo oborudovaniya [Improving the efficiency of the functioning of instrumental systems of automated machine equipment]. Staryy Oskol, Tonkie naukoemkie tekhnologii (TNT) Publ., 2018. 316 p.
  18. Perepelkin Yu.K., Giditsa V.E., Moskovkin V.A. Calculation of elastic deformation error in the conditions of complex automation. Glavnyy mekhanik, 2019, no. 5, pp. 41–49.
  19. Li Y., Cao H., Zhu Y. Study on nonlinear stiffness of rolling ball bearing under varied operating conditions. 2013 IEEE International Symposium on Assembly and Manufacturing (ISAM), 2013, pp. 8–11. doi: 10.1109/ISAM.2013.6643509.
  20. Denisenko A.F., Yakimov M.V., Borisova K.R. Radial stiffness anisotropy of body boring for lathe spindle bearings. Vestnik Bryanskogo gosudarstvennogo tekhnicheskogo universiteta, 2021, no. 5, pp. 23–31. doi: 10.30987/1999-8775-2021-5-23-31.
  21. Denisenko A.F., Yakimov M.V. Elastic anisotropy front bearing spindle unit lathes. Vestnik Samarskogo gosudarstvennogo tekhnicheskogo universiteta. Seriya: Tekhnicheskie nauki, 2015, no. 3, pp. 91–99.
  22. Zverev I.A. Modern state and development prospects of high-speed spindle units. Stankoinstrument, 2016, no. 4, pp. 62–69.

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