Transactions of Materials and Heat Treatment

Title：Influence of drawbead structure on ellipsoidal scalloped segment component in hydraulic drawing process

Authors： Tian Shu Zhang Jiegang Li Qian Yang Shengwei Yu Hongzhe Lang Lihui

Unit： Tianjin Long March Launch Vehicle Manufacturing Co. Ltd. Tianduan Aviation Technology Co. Beihang University

KeyWords： drawbead ellipsoidal scalloped segment hydraulic drawing wrinkle defect simulation analysis

ClassificationCode：TG394

year,vol(issue):pagenumber：2019,44(3):77-82

Abstract：

Based on the field experiment results of hydraulic drawing for large thin-walled scalloped segment, the reason of the defect was analyzed. Because of the insufficient local pulling force at large end corner of scalloped segment and excessive material flow, the defects could not be solved simply by adjusting the technological parameters as a whole. According to the above reasons of defects, three kinds of die optimization schemes were proposed and simulated respectively, and material flow and wrinkle were compared. The results show that on the basis of solving the wrinkling of the large end corner, scheme 3 is better on the overall forming effect. Finally, scheme 3 was regarded as the best scheme and field production was carried out, which was consistent with the simulation result. The local wrinkling and cracking defects of scalloped segment in hydraulic drawing process were solved by die optimization,and the qualified products were obtained.

Funds：

天津市科技计划项目（17YFZCGX00530）

田恕（1987-），女，硕士，工程师，E-mail：tian6shu@163.com

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