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Research on the electromagnetic blanking based on force-free region deformation: simulation and experiments

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Abstract

Electromagnetic blanking (EMB) based on force-free region deformation is proposed to meet the no burr forming requirement of diaphragm parts for carrier rockets in the aerospace field. Deformation behaviors of the part were revealed along with the effects of key process parameters on the forming quality investigated. During the EMB process, the electromagnetic force, effective stress, and plastic strain were distributed in a rather uniform annular region and peaked near the edge of the die. High-speed deformation coupled tension and bending were evidenced. With the increase in discharge voltage, the diameter of the part reduced slightly, and the filling degree of the trimmed edge section reduced remarkably, while the thickness uniformity was improved. It was found that the filling degree was dependent on the deformation degree and the interaction between two different regions. Similar effects of initial blank diameter and discharge voltage were observed. The interaction was notable at a larger initial blank diameter, causing the sharper drop in the filling degree. The forming quality could be improved by using a blank holder, but an undesirable extra deformation zone would appear. In a word, the proposed EMB process is capable of forming no burr diaphragm part with high quality.

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Acknowledgments

The authors would like to thank the Analytical and Testing Center of Huazhong University of Science and Technology for its technical support.

Funding

This work was supported by the National Natural Science Foundation of China (51575206 and 51705169) and the Fundamental Research Funds for the Central University (2016YXZD055).

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Authors and Affiliations

  1. State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China

    Jiahui Xu, Liang Huang, Xiudong Hong, Xianlong Liu, Hongliang Su & Jianjun Li

  2. Sichuan Aerospace Changzheng Equipment Manufacturing Co., Ltd., Chengdu, 610100, China

    Fei Ma

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  1. Jiahui Xu
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Correspondence to Liang Huang.

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Xu, J., Huang, L., Hong, X. et al. Research on the electromagnetic blanking based on force-free region deformation: simulation and experiments. Int J Adv Manuf Technol 108, 1751–1766 (2020). https://doi.org/10.1007/s00170-020-05472-x

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