Abstract: Aiming at the rolling problem of special steel grades caused by insufficient rolling capacity of tandem cold rolling mills, this study was carried out based on the rolling mechanism model (focusing on the rolling force model and combined with on-site actual production conditions. Under the condition of not increasing the number of existing mill stands, a small roll diameter rolling technology was proposed: reducing the stand roll diameter to decrease the unit rolling force, thereby improving the rolling capacity of the mill. The application results show that the implementation of this technology has a significant promoting effect on expanding the range of rolling varieties of the tandem cold rolling mill and releasing the rolling capacity, which provides a feasible path for the efficient rolling of special steel grades.

Key words: rolling model, rolling force, small roll diameter, tandem cold rolling mill