Abstract
In the conventional electromagnetic forming processes, the Lorentz force is induced by the eddy current in the specimen, so the coil should be specifically designed to form the electrical current return. Here, a novel electromagnetic forming method is suggested for aluminum alloy strip or profile, in which the inverse current is imposed instead of eddy current to generate Lorentz force. As an electromagnetic actuator, a very simple strip of copper was connected in parallel with the aluminum alloy strip. When the impulse currents flowed synchronously along the opposite directions between the copper and aluminum alloy strips, the Lorentz force was generated to deform the aluminum alloy strip. The electromagnetic forming of AA5754 aluminum alloy strip by imposing inverse current was investigated by numerical simulation. It was finally validated by comparison with the experimental results.
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Funding
This project was supported by National Natural Science Foundation of China (Grant No. 52005374) and Natural Science Foundation of Hubei Province (Grant No. 2019CFB196). We also would like to express our appreciation for the financial support from the State Key Laboratory of Materials Processing and Die and Mould Technology (Grant No. P2018-013, Huazhong University of Science and Technology, China) and the Jiangsu Key Laboratory of Precision and Micro-manufacturing Technology (Nanjing University of Aeronautics and Astronautics, China).
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Zeng, X., Meng, Z., Liu, W. et al. Electromagnetic forming of aluminum alloy strip by imposing inverse current instead of inducing eddy current. Int J Adv Manuf Technol 111, 3481–3488 (2020). https://doi.org/10.1007/s00170-020-06356-w
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DOI: https://doi.org/10.1007/s00170-020-06356-w