Transactions of Materials and Heat Treatment

Title：Experimental research on electromagnetic forming for aeronautic 5A02 aluminum alloy bellows

Authors： Bai Xueshan1 Zhang Xin1 Zhang Shuai1 Zhang Tiesen2 Zhao Tianzhang2

Unit： 1.Shenyang Aircraft Industry (Group) Co.Ltd. 2.Collge of Aerospace and Engineering Shenyang Aerospace University

KeyWords： electromagnetic forming bellow 5A02 aluminium alloy corrugated feature die attaching bulge

ClassificationCode：TG386

year,vol(issue):pagenumber：2021,46(12):165-168

Abstract：

Aeronautic 5A02 aluminium alloy bellow (outer diameter of 50 mm, wall thickness of 1 mm, corrugation height of 3.2 mm, corrugation pitch of 20 mm, transition fillet radius of 6.5 mm) was formed by electromagnetic forming method, and the optimum forming process parameters were obtained with the cross-sectional area for copper wire of 3 mm×7 mm wound with nine turns, the discharge energy of 16 kJ, the peak current of 60 kA and the frequency of 4.98 kHz. Then, the peak forming speeds at different positions along the circumferential direction on the corrugated feature section were measured by Laser Doppler Velocimetry, and the average forming speed was obtained about 208 m·s-1. Furthermore, the die attaching degree, thinning amount and hardness in the different corrugated feature sections and different positions along the axial direction were measured and analyzed, namely, the maximum die attaching gap was about 0.21 mm, the average thinning rate was about 11.9%, and the average hardness was about 53 HV. In addition, the electromagnetic forming force in the middle part of the corrugated feature was largest with good die attaching, large thinning amount and hardening degree higher than the two ends.

Funds：

白雪山（1981-），男，学士，高级工程师 E-mail：bxshan@163.com

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