Lehrstuhl für Fertigungstechnologie, Universität Erlangen-Nürnberg

Hydroforming influenced by high viscous fluid flows

Project Status: finished


Tube hydroforming is a manufacturing process, which finds numerous applications in the automotive industry. In order to achieve axial sliding for very long tube components during the forming process a flow influenced hydroforming process was developed. The flow of a high viscous fluid along the external and the internal tube?s surfaces produces shear stresses and pressure gradients, which combined with the external pressure influence the stress distribution of the tube in the feeding zone and reduce the friction force. The further objective is the adaptation of the tool for the use of a magnetorheological fluid as high viscous medium. For this purpose fundamental research must be accomplished by experiments and FE-analysis. Experimentally the liquid must be characterized regarding the generable viscosity and shear stresses. The strategy for the generation of a high and homogeneous magnetic field in the material of the forming tool must be developed with the help of the FE-Analysis. For these purpose permanent magnets or electric current conductors must be dimensioned and integrated in the hydroforming tool, in order to generate the desired effect on the fluid.

Letztes Update: 01.01.2010