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Technical gazette, Vol. 26 No. 5, 2019.

Original scientific paper

https://doi.org/10.17559/TV-20161215205553

Simulation of Flat Die Deep Drawing Process by Variable Contact Pressure Sliding Model

Milan Djordjević orcid id orcid.org/0000-0001-7317-8334 ; Faculty of Technical Sciences, University of Priština, Filipa Višnjiča bb, 38220 Kosovska Mitrovica, Serbia
Srbislav Aleksandrović ; Faculty of Engineering, University of Kragujevac, Sestre Janjić 6, 34000 Kragujevac, Serbia
Slaviša Djačić ; 1) Coal Mine, Pljevlja, Montenegro / 2) Faculty of Engineering, University of Kragujevac, Sestre Janjić 6, 34000 Kragujevac, Serbia
Aleksandar Sedmak orcid id orcid.org/0000-0002-5438-1895 ; Faculty of Mechanical Engineering, University of Belgrade, Kraljice Marije 16, 11120 Belgrade 35, Serbia
Vukić Lazić ; Faculty of Engineering, University of Kragujevac, Sestre Janjić 6, 34000 Kragujevac, Serbia
Dušan Arsić orcid id orcid.org/0000-0003-0326-0898 ; Faculty of Engineering, University of Kragujevac, Sestre Janjić 6, 34000 Kragujevac, Serbia
Milan Mutavdžić ; High Technical School, 24. novembra nn, 38218 Leposavić, Serbia

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Abstract

Influence of the contact pressure in the deep drawing processes is a very actual research topic in the metal forming technology. Within this research the tribological model of the strip sliding in the flat die was developed. The original experimental computerized apparatus for testing of the strip sliding in the variable contact pressure conditions was developed, as well. The complex, multi-factor experiment was performed by application of the Al thin sheet, with the contact elements of various roughnesses, with different lubricants application and with the variable contact pressure. Besides the description of the developed apparatus, the theoretical way for determination of the pressure dependences was also presented. Based on the theoretical changes of pressure, set in advance, the real influence of the contact pressure was obtained, for each of the given conditions. That makes possible to determine the influence of the tribological factors on the actual pressure. The obtained real contact pressure has verified the reliability of the experimental apparatus, namely the degree of the theoretical pressure dependences deviation from the real ones.

Keywords

computerized experimental apparatus; contact pressure; deep drawing; flat-die test; friction coefficient; tribological model

Hrčak ID:

225999

URI

https://hrcak.srce.hr/225999

Publication date:

8.10.2019.

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