Experimental Research of Hydroforming Square Hollow Component

Abstract

Tube hydroforming is attracting more and more attention in many industrial fields, especially in automotive industries and aircraft industry. In this paper, aiming at the problem of the match of axial force and internal pressure, the results of experimental research on the influence of loading path on hydroforming square hollow component was presented. The detail experimental procedure and material property was introduced firstly and the effect of loading path on the thickness distribution of the component was discussed in detail. Finally, the difference of four loading path was presented and analyzed with experimental results. It is demonstrated that the forming of blank is under the effect of tension stress and compression stress, the tension stress come from the force of punch and the compression stress come from the internal pressure, the loading path plays an important role in tube hydorforming process which was the key technology of hydroforming and it is benefit to optimize the load path with hydroforming different hollow component. Keywords-tube; hydorforming; loading path; thickness distribution; experiment