Roll profile electromagnetic control process parameters in precision rolling mill

To achieve micro-scale roll gap shape adjustment, roll profile electromagnetic control technology was proposed and a φ270 mm×300 mm roll profile electromagnetic control experimental platform was designed and built. Meanwhile, a mathematical model based on electromagnetic, thermal and mechanical coupled parameters was established. The results of both the experiment and simulation were compared and analyzed under the same process conditions. The comparison shows that the experimental and simulated results are in the agreement, thus verifying the model. Based on the simulated results, the roll crown and the roll crown growth rate changing with heating time were calculated under different equivalent current densities and frequencies. The influence of current density, frequency and heating time on the roll profile curve was presented. In addition, reasonable technological parameters were used in order to avoid local overheating of the electromagnetic stick and further facilitate adjustment of the roll crown.