Abstract
The pulsed-electromagnetic permanent magnet (PPM) technique is an attractive magnetic control technology for applying blank holding force (BHF) during the deep drawing of the non-ferromagnetic sheet. In this paper, a novel PPM blank holder technique was developed to apply BHF on metal sheet. The different process parameters are considered in the two sets of pole cores for achieving Magnetic state (M state) and Non-magnetic state (N state). The results show that current is only instantaneously imposed when switching magnetic force state, and not at other times. Also, the feasibility of the PPM blank holder technique is proven by a series of experiments using H68 copper sheet. The result indicates that the BHF applied by the PPM system is large enough for the deep drawing process of the copper sheet. The BHF applied by PPM force has the advantages of easy control, low energy consumption, and no overheating problems.
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The authors are pleased to acknowledge the financial support of National Natural Science Foundation of China (No. 51675466), and the Natural Science Foundation of Hebei Province of China (No. E2021203043). The work is also supported by the Science and Technology Research and Development Program of Qinhuangdao city (No. 202004A005).
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Zhang, H., Li, C., Qin, S. et al. A Forming Strategy of Copper Parts with Permanent Magnet Holding System. Iran J Sci Technol Trans Mech Eng 47, 717–727 (2023). https://doi.org/10.1007/s40997-022-00540-x
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DOI: https://doi.org/10.1007/s40997-022-00540-x