Transactions of Materials and Heat Treatment

Title：Research on rapid superplastic forming process for high-speed train head part with large and complex surface

Authors： Yang Daili1 Zhang Kaijia1 Du Zhihao2 Chen Ranran3 4 Zhou Tongxu3 4 Wang Chunxu3 4 Wang Guofeng3 4

Unit： 1.Nanjing Leierwei New Technology Corporation 2. School of Mechanical and Electrical Engineering Nanyang Normal University 3.School of Materials Science and Engineering Harbin Institute of Technology 4.National Defense Key Laboratory for Metal Precision Thermal Processing Harbin Institute of Technology

KeyWords： 5083 aluminum alloy left front side panel rapid superplastic forming high-speed train head maximum thinning rate

ClassificationCode：TG306

year,vol(issue):pagenumber：2023,48(8):83-89

Abstract：

For the left front side panel of high-speed train head, the rapid superplastic forming process of left front side panel for aluminum alloy was studied. Then, based on the 3D-shape of the left front side panel part, the punch and die for rapid superplastic forming were designed, the punch forming was used, and the inner profile of panel was used as the main profile of punch. Furthermore, the finite element analysis on the hot stamping, reverse bulging superplastic forming and direct bulging superplastic forming stages of the left front side panel was carried out by software MSC.MARC, the appropriate reverse bulging time was selected to control the reverse bulging thickness, the final forming of the part was realized by the direct bulging, the thinnest position was located in the machining allowance of the part, the maximum thinning rate was 21%, and there was a local accumulation phenomenon. After that, the rapid superplastic forming experiment of the left front side panel was carried out, and there were wrinkles at the upper end and the middle of front end, which was basically agreed with the results of the finite element analysis. In addition, after the forming process was improved,the left front side panel with good surface quality was successfully manufactured. Finally, the mechanical properties of material, the thickness distribution and the shape accuracy of part after forming were measured.

Funds：

国家自然科学基金资助项目（51875122）；河南省自然科学基金资助项目（222300420254）

作者简介：杨代立（1988-），男，硕士，中级工程师,E-mail：yangdaili@njlew.cn;通信作者：王国峰（1973-），男，博士，教授,E-mail：gfwang@hit.edu.cn

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