Transactions of Materials and Heat Treatment

Title：Research on hydroforming and wrinkle control for wing tip skin of 6061 aluminum alloy

Authors： Lang Lihui Yuan Chao Wang Yongming Xu Nuo Shao Tianwei Duan Xinmin

Unit： Beihang University AVIC Shenyang Liming Aero-engine (Group) Co. Ltd.

KeyWords： 6061 aluminum alloy hydroforming unconnected areas inner wrinkle long and narrow component

ClassificationCode：TG394

year,vol(issue):pagenumber：2014,39(9):36-41

Abstract：

The wing tip skin of 6061 aluminium alloy was formed by hydroforming, which effectively avoided deficiencies such as wrinkling and fracture in traditional deep drawing. A numerical model of hydroforming was established by using Dynaform software. The inner wrinkle in the unconnected area during the hydroforming process was analyzed under the technology scheme of different technological parameters. The influence regularities of blank holder clearance and chamber pressure on wrinkle control were studied. The results show that the sheet flow uniformity and the compressive stress in-plane of connected area sheet have strong effects on the wrinkle control. The inner wrinkle on unconnected areas is caused by unsuitable blank holder clearance. The chamber pressure hinders the blank flowing into die too quickly at the beginning of the hydroforming process and offsets the compressive stress in-plane to a certain extent at the middle and later period of that process and inhibits wrinkling trend on connected areas. The simulation results are verified through the experimental results and qualified wing tip skin is produced.

Funds：

国家自然科学基金资助项目（51175024）

郎利辉（1970-），男，博士，教授

Reference：

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