Combined Setting Technology of the Bending Roll in Five Stands 4-High Reduction Cold Mill

Abstract

On the foundation of taking equipment and production technology into consideration,we present a set of combined setting technology of the parameter of the strip suit to cold reduction mill of roll four and framework five。Then the parameter of the strip was controlled combined and coordinated of framework 1-5. On the one hand,it ensures the function of the force of the bending roll not cancel out mutually,and enhances the controlled effect of the force of the bending roll in the strip,on the other hand, there will not be new extra and partial shape wave under the complex effect of the force of the bending roll.Meanwhile there will not be the problem that the force of the bending roll in some parts get too high even overall loading while the other parts get get too low in the setting procedure.While improving the lifespan of the fluid cylinder, the adjusting rest of the force of the bending roll get increased. While the related technology has been adopted by field engineering, we have achieved excellent result, and there is the value for more expanding.

Preset model of bending force in 6-high universal crown tandem cold rolling mill based on symbolic regression

“…Figures 8 and 9 show the final tree structure after the evolution of the WRB and IRB preset model, which is organised to obtain the bending force preset model equation as shown in Eqs. (11) and (12).…”

“…Cao et al developed a mathematical model for bending force preset in a 6-high reversing cold rolling mill using the genetic algorithm based on the analysis of the relationship between the main factors related to bending force in the rolling process, such as strip width and rolling force, which was predicted with high accuracy and was used to guide the actual production process [11]. Zhou et al present a set of combined setting technology of bending force of tandem cold rolling mill, which can ensure the function of the bending force does not cancel out mutually and enhance the control effect of bending force on strip shape [12]. Bu et al established a multi-objective function for bending force preset based on the two-objective optimisation of bending roll force and rolling force and proposed a bending force preset model considering flatness and thickness to improve the accuracy of shape presetting control [13].…”