Abstract: The influence factors of the transverse thickness difference of cold rolled silicon steel were studied in this paper. Using the research method of 6 Sigma, the DOE experiment scheme was designed, and the regression model of the thickness difference and four variables were obtained. The optimal value of the thickness difference was obtained by optimizing the variables in the model. On the premise of meeting customers’ requirements of the thickness difference, the intermediate roll shifting and roll profile can be optimized according to the average crown of hot rolling, so as to reduce the amount of cold rolling trimming, avoid the waste of trimming and improve the comprehensive yield of silicon steel.

Key words: cold rolled silicon steel, transverse thickness difference, 6 Sigma, model