Lehrstuhl für Fertigungstechnologie, Universität Erlangen-Nürnberg

Sheet metal hydroforming of tailored blanks using magnetorheological fluid as forming and sealing medium

Project Status: finished


By using magnetorheological fluids as an active fluid medium in blank hydroforming processes the current process window can be enhanced. Particularly the sealing limit can be influenced and shifted to larger cavity pressures and lower flange contact pressures. This is done by influencing the fluid behaviour locally by applying external, locally different magnetic flux densities. To increase the sealing effect especially at small heights of leakage area cross sections, magnetic fields are applied in the flange area, which leads to a basic change in viscosity behaviour. The adaptive material properties of the used fluid have a significant effect on tribological terms between tool an blank. This makes it necessary to investigate these circumstances in detail. To ensure an integrated consideration of the whole process, numerical simulations of static flow conditions are carried out. The mentioned numerical simulations are compared to experimental results and validated.

Magnetorheological fluid in the flange area after the forming operation at a defined magnetic flux density

Research Groups



    • Degner, J.; Herrmann, J.; Junker, F.; Berendt, E.; Merklein, M.:
      Leichtbauwerkstoffe für den modernen Automobilbau.
      Zeitschrift Konstruktion 3(2018), pp. 50-54

    Letztes Update: 17.02.2014