Draw beads are widely utilized as a mechanism for providing proper restraining force to a sheet in a forming operation. In this paper, numerical simulations using the nonlinear finite element method are conducted to model the process of drawing a sheet through various draw bead configurations to study the mechanics of draw bead restraint. By examing the sensitivity of the draw bead restraining force due to the change of the draw bead penetration, the work shows that the penetration has the potential to be a very good element for varying and controlling restraining force during the process. A closed-loop feedback control of draw bead penetration using a proportional-integral controller is achieved by the combination of the original finite element simulation and a special element which links penetration to a pre-defined restraining force trajectory. This method has the potential to accommodate the uncontrolled variation of boundary conditions in practice and therefore improve the forming repeatability dramatically. The use of finite element analysis as a method for numerically experimenting and exploring new processing methods is also demonstrated by the results of this paper.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Draw Bead Penetration as a Control Element of Material Flow


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Cao, Jian (Autor:in) / Boyce, Mary C. (Autor:in)

    Kongress:

    International Congress & Exposition ; 1993



    Erscheinungsdatum :

    1993-03-01




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Draw bead penetration as a control element of material flow

    Cao,J. / Boyce,M.C. / Massachusetts Inst.of Technology,MIT,Cambridge,US | Kraftfahrwesen | 1993


    Draw bead design for deep profiles

    Conrad,R. / Reynolds Metal Company | Kraftfahrwesen | 1975


    Draw Bead Design for Deep Profiles

    Conrad, Reinhardt | SAE Technical Papers | 1975


    Tool material performance during draw bead deformation of aluminum sheet

    Zonker,H.R. / Whittle,N.C. / Hoffman,R.A. et al. | Kraftfahrwesen | 1996


    Tool Material Performance During Draw Bead Deformation of Aluminum Sheet

    Zonker, H. R. / Teichman, M. M. / Whittle, N. C. et al. | SAE Technical Papers | 1996