Abstract: Aiming at the problem of poor straightening effect and diversification of straightening factors of steel strip, the principle of roller straightening was analyzed. During the process of straightening the steel strip, the changes of deflection, curvature and rotation angle were analyzed. Then,the mechanical model between the roller and the roller was established. Moreover, the mechanical equation was derived and the mechanical properties of the steel strip during the straightening process were obtained. The overall threedimensional model of the steel strip straightening machine was carried out,the overall finite element analysis was carried out to obtain the change of the force between the roller and the steel belt in the straightening process of the steel belt. The deflection of work rolls and workpieces changes in straightening process,the law of change was obtained by analytic method. Through force analysis, the change rule of rotation angle between three rollers was obtained. Moreover, the influence of reduction on straightening accuracy was analyzed, and the trajectory of contact point was obtained. The results indicate that the variation of deflection, rotation angle and reduction meet the requirement of straightening accuracy. The simulation results show that the analysis of influencing parameters is reasonable.
Key words: straightening machine for steel strip; mechanical model; analysis of influencing factors