Transactions of Materials and Heat Treatment

Title：Hydro-pressing process for complex three-dimensional twisted hollow blade

Authors： Hu Jiamin Zhang Yunxin Luo Jian Li Jianjun Yang Yunfeng Wan Yongchao Li Youchun Chen Peng

Unit： AECC South Industry Co. Ltd.

KeyWords： hydro-pressing hollow blade small radius fillet wall thickness distribution thinning rate hydro-forming pressure

ClassificationCode：TG386

year,vol(issue):pagenumber：2023,48(8):90-95

Abstract：

The research on hydro-pressing process for complex three-dimensional twisted hollow blade of an aero-engine was carried out, and the hydro-pressing process for hollow blade was numerically simulated by finite element analysis software. Then, the influences of length of tube blank, structure of sealing push head and hydro-forming pressure on die fittingness of tube blank, wall thickness and size during the hydro-pressing process of superalloy GH4169 thin-walled tube were investigated, and the test verification was carried out. The results show that the shorter the length of tube blank is, the easier the material at both ends of tube blank flows to the middle, and the tube blank is easy to wrinkle. The tapered sealing push head is used to effectively improve the material flow and realize the simple and effective sealing of tube blank. A small radius fillet of tube blank is formed under a relatively low hydro-forming pressure by the hydro-pressing process. When the length of tube blank is 240 mm and the hydro-forming pressure is 9 MPa, the die fittingness of tube blank is good, the minimum fillet radius is 1.0 mm and the maximum wall thickness thinning rate is 4.1%. The test results are consistent with the numerical simulation results. The formed hollow blades with good surface quality, uniform wall thickness and small thinning meet the requirements of dimensional accuracy. The purpose of short-process, low-cost and high-precision forming of complex three-dimensional twisted hollow blades is realized.

Funds：

作者简介：胡加敏（1992-），男，博士，工程师,E-mail：jiamin.hu@foxmail.com

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