Transactions of Materials and Heat Treatment

Title：Hydroforming of elbow tube with small radius base on Dynaform

Authors：

Unit：

KeyWords：

ClassificationCode：TG394

year,vol(issue):pagenumber：2019,44(8):86-91

Abstract：

The hydroforming of elbow tube with small radius for 304 stainless steel was studied. Firstly, the theoretical values of the main process parameters, such as initial yield pressure, forming pressure, shaping pressure and axial feeding amount, were obtained by calculation. Then, the finite element model was established, the influences of the main process parameters on the forming quality were analyzed, and the main process parameters were optimized. Finally, the feasibility of this method was verified by experiments with optimized process parameters. The results show that the excessive initial yield pressure or forming pressure leads to excessive thinning of tube wall and rupture of elbow tube, and too small forming pressure or too large axial feeding anount leads to wrinkle in the inner side of elbow tube easily. Furthermore, the optimization of forming process parameters are achieved by combining theoretical calculation with numerical simulation to provide theoretical and technical support for achieving the hydroforming of the elbow tube with small radius.

Funds：

国家自然科学基金资助项目(51575364)

作者简介：蔡晋（1979-），男，博士，副教授 E-mail：saucai@163.com

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