Electronic temperature control roll (ETCR) technology is a new roll profile control technology based on the principle of the semiconductor cooling and heating effect. The thermoelectric cooler (TEC) is the core component for controlling roll profiles in this technology. The TEC layout and the roll structure can affect the bulging ability of the roll, the bulging uniformity and the uniformity of the roll temperature field. To research the influence of the TEC layout and the roll structure on these factors, a circumferential finite element model of ETCR is established by the finite element software MSC.MARC, and is verified on the experimental platform of ETCR. After analysis, it was found that increasing the roll diameter or decreasing the diameter of the roll inner hole can increase the bulging ability of the roll, improve the bulging uniformity and weaken the temperature ratchet. Increasing the temperature of TEC or decreasing the single piece influence angle can increase the bulging ability of the roll and improve the temperature ratchet, while the effect of changing the single piece influence angle on the bulging uniformity is larger than that of the temperature of TEC. In view of the difficulty of circumferential uniform bulging when the single piece influence angle is large, a scheme of adding a metal layer of high thermal conductivity material in the roll inner hole is proposed. The results showed that the copper layer has little influence on the bulging ability of the roll and can reduce the circumferential bulging difference.

Roll profile electromagnetic control technology (RPECT) is a strip flatness control technology based on the flexible control of roll profiles. As the core component, electromagnetic sticks can bulge with the induction heating of induction coils. To ensure the integrity of the coil circuit, the surfaces of the electromagnetic sticks need to be provided with slots. Moreover, the inner hole of the electromagnetic control roll is also needed to install the electromagnetic stick in the roll. The structures of the inner hole and slots affect the local structure of the electromagnetic stick and the electromagnetic control roll and then change the roll profile control ability. To research the radial bulging ability, the roundness of bulging, and the composition between the thermal crown and force crown under different holes or slots, a finite element model of circumferential RPECT is established by using the finite element software MARC. After analysis, the results showed that the radial bulging ability and the roundness under the influence of the roll radius were larger than those under the influences of the slot radius and slot amount, and the composition characteristics of the comprehensive roll profile were different under different conditions. Therefore, to achieve accurate roll profile control, the influences of the structures of holes and slots need to be included in the RPECT index.