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A novel punching process with electronically permanent magnetic technology

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Abstract

A novel punching process is proposed in the paper, exploiting magnetic attractive force to punch holes in sheet metal. The punching force is produced by multiple electromagnetic pole units, namely, electromagnetic cushion (EMC). With the method based on the electro-permanent magnetic (EPM) technology, the punching process can not only be realized but also the amplitude of the stamping force can be adjusted arbitrarily by altering the excitation current and stamping clearance. Moreover, the power, transmission, and execution systems are integrated into the developed device for loading punching force independently on the sheet metal, which provides a feasible method for the lightweight design of the stamping equipment. During the punching process, the coils only need to be powered 20 ms twice to load and unload punching force at the moment of beginning and end, respectively, which is low energy consumption. Through FEA, the punching force and cross-section area are calculated, varying with the punching clearance and magnetization current. Meanwhile, the punching tests were performed, and the feasibility of EPM punching was verified. In the end, the forming capability is compared through the quality of the fracture surface. Experimental result shows that the proposed punching process can complete the punching of copper, aluminum, and steel sheet plates.

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Contributions

Sicheng He: software, formal analysis, and writing. Yonggen Sun: methodology, software, investigation, and writing—original draft. Siji Qin: conceptualization and methodology.

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Correspondence to Siji Qin.

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He, S., Sun, Y. & Qin, S. A novel punching process with electronically permanent magnetic technology. Int J Adv Manuf Technol 131, 5801–5813 (2024). https://doi.org/10.1007/s00170-024-13276-6

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  • DOI: https://doi.org/10.1007/s00170-024-13276-6

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