Affiliations: [a] Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan, Hubei, China | [b] School of Electronic Information and Engineering, Hubei University of Science and Technology, Xianning, Hubei, China
Correspondence:
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Corresponding author: Liang Li, Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan, Hubei, China. Tel.: +86 027 87792331; Fax: +86 027 87792333; E-mail: liangli44@mail.hust.edu.cn.
Abstract: Electromagnetic pulse welding (EPW) is an effective way to realize the connection of two different kinds of metal materials via pulsed electromagnetic forces. To improve the welding performance, a new EPW process with a dual-stage coil system is proposed for joining aluminum sheets in this paper, in which one coil is used to generate a pulsed magnetic field with a short pulse width for inducing an eddy current in the aluminum sheet, while the other one is applied to generate a background magnetic field with a relatively long pulse width for increasing electromagnetic force acting on the aluminum sheet. The EPW system has been designed and implemented based on the simulation results using the finite element method, with considering the effects of coil shape, the number of coil turns and the discharge parameters. Finally, experiments are carried out to validate the feasibility of the EPW system.
Keywords: Electromagnetic pulse welding, pulse magnetic field, background magnetic field
