Transactions of Materials and Heat Treatment

Title：Failure control on hydroforming process of thin-walled aluminum alloy with complex surface covers

Authors： Wang Yongming Zhu Shiqiang Yang Wei Li Jie Zhang Wenzhong Yuan Nan Kang Hongze Fu Maoyin Liu Yansong Zhao Liang

Unit： Capital Aerospace Machinery Company

KeyWords： hydroforming aluminum alloy thin-walled cover with complex surface failure control initial reverse bugling

ClassificationCode：TG386

year,vol(issue):pagenumber：2017,42(9):69-73

Abstract：

For one typical thin-walled aluminum alloy cover with complex surface, the influences of the punch initial reverse bugling position and the die cavity pressure on wrinkle were analyzed by numerical simulation and experiment method, and the process parameters were optimized. The results indicate that if the punch initial reverse bugling position is below the die surface, there is no pressure in the die cavity with the punch entering the die, and the unsupported blanks are subjected to tensile stress along one direction and compressive stress along another direction and easy to wrinkle. If the punch initial reverse bugling position is above the die surface, the unsupported blanks have been acted by the pressure in the die cavity with the punch entering the die and subjected to bidirectional tensile stress. Thus, the wrinkle can be controlled. If the die cavity is over high, the unsupported blanks will suffer higher tensile stress, and crack is easy to occur. The unsupported blank wrinkle and crack can be eliminated by a reasonable control on the punch initial reverse bugling position and the die cavity pressure.

Funds：

民用航天技术预先研究项目（科工一司（2014）618号）

王永铭（1982-），男，博士，工程师 E-mail：wangyongming211@163.com

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