A circular cup deep-drawing process was investigated using a magnesium alloy material, which is the lightest practical material for use in manufacturing structural components. An improvement in the limiting drawing ratio (LDR) at 300 C deg was observed, by controlling a variable blank holder force (BHF) during the process, in comparison with the constant BHF conditions. The reason for the improvement of the LDR is that the magnesium alloy material has a low F-value (strength coefficient), which was obtained from tensile tests when it was warmed to the elevated temperature. When the experimental conditions are not appropriate, such as when BHF is high, the experimentally drawn cup fractured at the wall part (beta-rupture). The LDR of the magnesium alloy sheet was improved using the BHF control technique and verified using a finite element method (FEM) simulation. It is confirmed that the FEM simulations behaved in a similar manner to the experiments, with ß-rupture being observed during the fracture at the wall part. It was confirmed that the thinning of the wall thickness at the punch shoulder part and the wall of the drawn cup depended on the initial BHF conditions.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Effect of blank holder force control in deep-drawing process of magnesium alloy sheet


    Beteiligte:

    Erschienen in:

    Erscheinungsdatum :

    2005


    Format / Umfang :

    7 Seiten, 15 Bilder, 2 Tabellen, 4 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




    Experimental Research on Warm Deep Drawing of Magnesium Alloy Sheet by Variable Blank Holder Force Control

    Chang, Q. F. / Peng, Y. H. / Li, D. Y. et al. | British Library Conference Proceedings | 2007


    Numerical simulation of deep drawing with sliding under blank-holder

    Jameux, M. J.-P. / Ronde-Oustau, M. F. / Bendhia, M. H. et al. | British Library Conference Proceedings | 1993



    Pulsating Blank Holder In Sheet Forming

    Da Re, M. | British Library Conference Proceedings | 1995


    Defining of variable blank-holding force in deep drawing

    Aleksandrovic, S. / Stefanovic, M. | Tema Archiv | 2000