OPTIMIZING CNC MACHINING TECHNOLOGIES VIA DIMENSIONAL STRUCTURAL EFFECTS

Alexei TOCA, Aurel STRONCEA, Tatiana NITULENCO

Abstract


This paper explores the structural optimization of CNC machining processes, considering that in complex dimensional structures, the structural effect manifests as increased machining allowance tolerances, which reduces the degree of technological assurance of accuracy. This structural effect increases the required machining accuracy. The phenomenon of error compensation and its impact on reducing tolerances in both formed technological dimensions and machining allowances is evaluated. The paper proposes a tool for evaluating technological dimensional structures, based on the relationship between acceptable tolerances in formed technological dimensions and machining allowances.

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P. Gust, A. Sersch, T. Steger, Ch. Schluer. Analysis of approaches of tolerance allocation regarding to economic efficiency. Proceedings of the Design Society: International Conference on Engineering Design (ICED19), 2019, pp. 3481-3490. Doi.org/10.1017/dsi.2019.355.

A. Armillotti. Selection of parameters in cost-tolerance functions: review and approach. International Journal of Advanced Manufacturing Technology, 2020, vol. 108, pp.167–182. Doi.org/10.1007/s00170-020-05400-z.

C. Sornsiri, C. Chungchoo. Application of tolerance charting using rooted tree graph for allocating manufacturing specifications into the precision machined part: detailed explanation of manufacturing a standard weight of mass. International Journal of Applied Engineering Research, 2017, Vol. 12, No18, pp. 7838-7852, ISSN 0973-4562, https://www.ripublication.com/ijaer17/ijaerv12n18_97.pdf.

L. Slătineanu, M. Coteaţă, O. Dodun, G. Nagîţ, A. Hriţuc, I. Beşliu-Băncescu. Ways for determining the intermediate dimensions when designing the machining technology. IOP Conf. Series: Materials Science and Engineering. 1018, 2021, 012019. Doi:10.1088/1757-899X/1018/1/012019.

C. Balamurugan et al. Concurrent optimal allocation of geometric and process tolerances based on the present worth of quality loss using evoluţionary optimisation techniques. Research in Engineering Design. 2017, vol. 28, pp.185–202. Doi: 10.1007/s00163-016-0230-7.

M.S. Kumar, S.M. Kannan, V.A. Jayabalan. A new algorithm for optimum tolerance allocation of complex assemblies with alternative process selection. International Journal of Advanced Manufacturing Technology, 2009, vol. 40, pp. 819–836. Doi: 10.1007/s00170-008-1389-5.

A. Toca. About the mutual influence of design and technological dimensional structures at creation of the optimum technological processes to machining. Procedings of the 14th International Conference ModTech 2010, 2010, pp. 623 – 626.

A. Stroncea, A. Toca, A., T. Nitulenco. Considerations regarding the optimal dimensional design of machining technologies. Acta Technica Napocensis. Series: Applied Mathematics, Mechanics, and Engineering. Vol. 66, Issue Special II, October, 2023, pp. 345-354.

M. Ghali, M. Tlija, N. Aifaoui, E. Pairel. A CAD method for tolerance allocation considering manufacturing difficulty based on FMECA tool. International Journal of Advanced Manufacturing Technology. 2017, vol. 91, pp. 2435–2446. Doi: 10.1007/s00170-016-9961-x.

ISO 10791-7:2020. Test conditions for machining centres - Part 7: Accuracy of finished test pieces.

A. Toca., T. Niţulenco, R. Ciuperca. Analiza sistemică şi funcţională. Chisinau, Editura UTM, 2022, 280 p. ISBN 978-9975-45-767-5.

A. Toca, I. Stingaci, I. Rushica. The effects of error’s compensation in machining. Procedings of International Conference ModTech 2012, 2012, Vol 2, pp. 953-956.


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