Transactions of Materials and Heat Treatment

Title：Experimental research on equal diameter hole flanging by electromagnetic pulse for aluminum alloy tube

Authors： Ma Boyang Yang Shu Li Chunfeng Yu Haiping

Unit： Harbin Institute of Technology The National Key Laboratory for Precision Hot Forming of Metals

KeyWords： electromagnetic pulse forming aluminum alloy multi-pass tube flanging prefabricated hole

ClassificationCode：TG391

year,vol(issue):pagenumber：2021,46(4):191-198

Abstract：

Multi-pass tubes formed by traditional technology exist the problems such as complex tooling structure and process and so on. Therefore, through controlling various process parameters, the influence laws of main parameters in the flanging process by electromagnetic pulse were studied, and the limit flanging coefficient was obtained. The results show that the best prefabricated hole shape is oval, and the high discharge frequency causes the tube blank to deform too fast, which leads to cracks, but low discharge frequency causes the skin depth to increase, which makes the outer side of tube blank produce a reverse force during deformation and makes it difficult to stick to the mold. It can be seen that increasing the discharge voltage within a certain range is beneficial to the tube blank sticking to the mold, and proper lubrication effectively inhibits the wall thickness thinning of the flanging port. Thus, the maximum flanging height of equal-diameter hole is up to 6 mm, and compared with the theoretical value of conventional flanging process, the limit flanging coefficient is reduced by 20.9%.

Funds：

国家自然科学基金面上项目（51675128）

马伯洋（2000-），男，本科生 E-mail：1170910219@stu.hit.edu.cn 通讯作者：于海平（1974-），男，博士，副教授，博士生导师 E-mail：haipingy@hit.edu.cn

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