Research on electromagnetic control characteristics of roll profile under the limit control range of electromagnetic stick

To explore the capacity of electromagnetic control rolls under the limit control range of an electromagnetic stick, the characteristics of roll profile electromagnetic control technology (RPECT) are systematically investigated under different limit control positions, limit control distances, magnetic parameters, and control strategies. The calculation results show that the limit control range of an electromagnetic stick exists in RPECT, and the limit control range has a great influence on the roll profile in the process of control and the final status. With the increase of the limit control distance, the electromagnetic control roll profile moves toward the middle of the roll. Then, this effect decreases rapidly. It can be considered that control positions with the limit control distance less than 50 mm are all the limit control regions. At the same time, the bulging and temperature rise of the roll neck are relatively low due to the regulation zone being in the limit control range, so it is not necessary to consider bulging or the temperature rise too much for the selection of roll end bearings. In addition, under different control strategies, due to the difference in the strategies and the structural characteristics of the roll end, the response rate and steady-state holding capacity of the electromagnetic control roll also have great influence. The research results provide a theoretical basis for the prediction and calculation of the electromagnetic control roll profile and the configuration of the electromagnetic control roll.