Effects of Preform on Thickness Distribution of Hydroformed Y-Shaped Tube

Gang Liu; Jun Yang Peng; Xiao Song Wang; Shi Qiang Zhu; Shi Jian Yuan

doi:10.4028/www.scientific.net/AMR.189-193.2796

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Effects of Preform on Thickness Distribution of Hydroformed Y-Shaped Tube
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Control on Head Displacement of H-Beam in Rolling Process
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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 189-193Effects of Preform on Thickness Distribution of...

Effects of Preform on Thickness Distribution of Hydroformed Y-Shaped Tube

Abstract:

Hydroforming processes of a Y-shaped stainless steel tube with d/t (ratio of diameter to thickness) of 183 is presented. FEM simulations were carried out for analyzing the stress states and thickness distribution in the workpieces during hydroforming of the Y-shaped tube. A two-step process with preform procedure is presented to improve the stress states in the protrusion and to avoid the severe thinning at the top of the protrusion. Through the two-step hydroforming, the wrinkling and cracking defects were all avoided and sound components were produced.