Computer Simulation of the Press Fit Connection

The design of modern technology is associated with increased requirements for strength and manufacturability. Press fit connections of small size parts can withstand significant workloads, so they are widely used in mechanisms and machines. Traditionally, the calculation of press fit connections is performed according to classical formulas using a large amount of reference data. The calculations use standard recommendations that make it easier to obtain solutions with a minimum investment of time. However, the time saving limits the search to a few joints, which are not always the best in some indicators. Modeling press fit joints with different combinations of parameters leads to the formation of hundreds of potential joints. To check their performance, it is necessary to use modern computing facilities. The computer has almost unlimited possibilities for computing speed and storing arrays of information. Simulation of press fit connections on a computer allows obtaining regression metamodels, accessing the statistical significance of parameters, and determining the area of workable connections. It becomes possible to optimize the design of the joint in terms of strength, weight and assembly technology. The system for calculating and statistical analysis of press fit connections has been developed on the basis of existing standards. A program has been developed providing the joints formation and verification with an assessment of their suitability for the specified requirements.

References

[1] Wang X., Lou Z., Wang X., Xu C. A new analytical method for press-fit curve prediction of interference fitting parts. Journal of Materials Processing Technology, 2017, vol. 250, pp. 16–24, doi: https://doi.org/10.1016/j.jmatprotec.2017.06.022

[2] Mastinu G., Gobbi M., Bon A. A Railway Wheelset Optimally Designed for Cold Press Fitting. JSME International Journal. Series C, 2004, vol. 47, no. 2, pp. 502–597, doi: 10.1299/jsmec.47.502

[3] Detali mashin. [Machine details]. Ed. Ryakhovskiy O.A. Moscow, Bauman Press, 2007. 515 p.

[4] Gill A. Applied Algebra for the Computer Sciences. Prentice-Hall Inc., N. J., 1976. 430 p.

[5] Birger I.A., Shorr B.F., Iosilevich G.B. Detali mashin. Spravochnik [Machine parts. Guide]. Moscow, Mashinostroyeniye publ., 1979. 702 p.

[6] Ivanov M.N., Finogenov V.A. Detali mashin [Machine details]. Moscow, Vysshaya shkola publ., 2008. 408 p.

[7] Dunayev P.F., Lelikov O.P. Detali mashin [Machine details]. Moscow, Vysshaya shkola publ., 2017. 564 p.

[8] GOST 25346–2013. Osnovnyye normy vzaimozamenyayemosti. Kharakteri-stiki izdeliy geometricheskiye. Sistema dopuskov na lineynyye razmery. Osnovnyye polozheniya, dopuski, otkloneniya i posadki [ISO 286-1:2010. Basic norms of interchangeability. Geometrical product specifications. Code system for tolerances on linear sizes. General provisions, tolerances, deviations and fits]. Moscow, Standartinform publ., 2014. 43 p.

[9] Skvortsov S.V., Skvortsova T.S., Khryukin V.I. Selection of standard fits with random nature of sizes of holes and shafts for CAD/CAM systems. Vestnik of Ryazan state radio engineering university, 2017, no. 61, pp. 32–40 (in Russ.), doi: 10.21667/1995-4565-2017-61-3-32-40

[10] Weiskamp K. Advanced Turbo C Programming. New York, Academic Press Inc., 1988. 554 p.

[11] Montgomery D.C. Design and Analysis of Experiments. John Wiley & Sons, 2008. 680 p.

[12] Nau R. Statgraphics version 5: overview & tutorial guide. Fuqua School of Business, Duke University, 2005. 22 p.