Research on Electromagnetic Control Technology for the Roll Profile of Wide-Width Electrode Roll Press Rolls

To address the challenge of transverse thickness consistency in wide-width electrode calendering, this study developed a flexible roll profile regulation technology based on electromagnetic induction heating. An axisymmetric electromagnetic–thermal–structural coupling finite element model is established and validated on a self-built experimental platform. Systematic simulations were conducted to investigate the influence of equivalent current density Js, current frequency f, and coil turn n on the roll temperature and roll profile. The maximum temperature of the roll’s inner bore and the roll crown exhibit a positive correlation with Js, f, and n. A cyclic heating strategy was developed to control and stabilize the roll profile. The stable crown CW shows linear correlation with heating durations t1 and a nonlinear trend with Js. Under fixed Js and t1, further optimization of duty cycle and cooling conditions enables long-term stabilization of the roll profile.