To the Question on the Friction Assessment Methods Applied for Metal Forming Operations

Abstract:

In many technological processes, friction results strong wear of the tool set and causes defect forgings. Many experimental investigations started in XX century had shown, that there are some laboratory methods with trustable results, which can be applied for friction prediction in real processes of metal forming. Among them such tests like ring compression test, direct and backward extrusion test, double cup extrusion test and T-shape compression test can be selected. Each of them has limitations that do not allow distributing the results of one certain test on all metal forming processes. Moreover, the tests should be done in a proper way to guarantee the adequate results that could be time-consuming. With the help of FE-analysis, the authors investigated numerically the intensity of the pressure distribution on the tool's surfaces and coupled the results with the real situations, observed in the metal forming operations. For the relative young T-shape compression technique oriented on the high contact pressure values authors have examined the changing of the relative deformed material volume as the merit of the friction characterisation.

• Periodical: Key Engineering Materials (Volumes 651-653)
• Pages: 522-529
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.651-653.522
• Online since: July 2015
• Authors: Michael A. Petrov, Pavel A. Petrov*, Ramil R. Yafaev
• Keywords: FEM, Friction Coefficient, Friction Factor, Metal Forming, QForm, Ring Compression Test, T-Shape Compression Test

References

[1] P. Petrov, J. Bast, M. Petrov, V. Voronkov, M. Schajchulov, Numerische Vergleichsanalyse der Methoden zur Abschätzung der Reibung in Umformprozessen, Tribologie und Schmierungstechnik 5 (2011) 10-14. (in German).

[2] I. Kacmarcik, D. Movrin, A. Ivanisevic, One contribution to the friction investigation in bulk metal forming, Journal for technology of plasticity 36(1) (2011) 35-48.

DOI: 10.2478/v10211-011-0001-4

[3] A.T. Male, M.G. Cockroft, Method for the determination of the coefficient of friction of metals under conditions of bulk plastic deformation, Journal of the Institute of Metals 93 (1964) 38-46.

[4] M. Geiger, A. Messner, U. Engel, Production of microparts – size effects in bulk metal forming, similarity theory, Production Engineering IV/1 (1997) 55-58.

[5] G.-Y. Kim, M. Koc, Modelling of the size effect on the behaviour of metals in microscale deformation processes, Transactions of the ASME 129 (2007) 470-476.

[6] J. Jeon, A.N. Bramley, A friction model for micro forming, Int. J. Adv. Manuf. Technol. 33 (2007) 125-129.

[7] M. Geiger, M. Kleiner, R. Eckstein, N. Tiesler, U. Engel, Micro forming. Annals of the CIRP №2(50) (2001) 445-462.

DOI: 10.1016/s0007-8506(07)62991-6

[8] M. Petrov, P. Petrov, V. Voronkov, D. Grishin, Numerical investigation of the hot isothermal process and force size-effect of a clutch-half forming, Key Engineering Materials 611-612 (2014) 1608-1616.

DOI: 10.4028/www.scientific.net/kem.611-612.1608

[9] A.N. Levanov, V.L. Kolmogorov, S.P. Burkin, B.R. Kartak, U.V. Ashpur, U.I. Spasskiy, Contact friction in metal forging, Metallurgia Publisher, Moscow, 1976. (in Russian).

[10] Q. Zhang, M. Arentoft, S. Bruschi, L. Dubar, E. Felder, Measurement of friction in a cold extrusion operation: Study by numerical simulation of four friction tests, in: P. Boisse, F. Morestin, E. Vidal-Salle (Eds.), Proceedings of the 11th ESAFORM Conference on Material Forming, France, 2008, pp.1267-1270.

DOI: 10.1007/s12289-008-0133-x

[11] Q. Zhang, E. Felder, S. Bruschi, Evalution of friction condition in cold forging by using T-shape compression test, Journal of Materials Processing Technology 209 (2009) 5720-5729.

DOI: 10.1016/j.jmatprotec.2009.06.002