Theoretical and experimental research on the law of flexible roll profile electromagnetic control

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To obtain a better strip shape, this paper proposes a new micro-scale roll profile control technology. According to the principle of the technology, it can be called roll profile electromagnetic control technology (RPECT). To achieve multi-point and real-time measurement the profile of electromagnetic control roll, the new roll profile test technology is proposed. Relying on the RPECT and new roll profile test technology, a φ270 mm×300 mm roll profile electromagnetic control experimental platform (RPECEP) is designed and built. An electromagnetic-thermal- mechanical coupled axisymmetric simulation model with the same size is established. Through experiments and simulations, RPECT is confirmed to achieve micro-scale flexible roll profile adjustment. An all-around comparison of experimental results and calculated results confirms that the new roll profile test technology is feasible and the calculatde results agree well with the experimental results. Based on the model, the variation of the roll profile is analysed for different electromagnetic parameters; the structures and positions of the electromagnetic stick, reasonable electromagnetic parameters and optimal time period for the roll profile control are determined, and methods for changing the number of roll profile curves are given.