In the process of producing strip in the cold rolling mill,unreasonable rolling process parameters will lead to serious plastic deformation of the strip product,resulting in cavity opening defects in the coiling of the produced strip.In order to pre-vent the serious loss caused by cavity opening defects,the tension system optimization model with the goal of preventing strip cavity opening defects was established by calculating the lubricating oil film thickness,friction factor and rolling force by fully combining the process flow and equipment characteristics of the cold rolling mill.By optimizing the tension between the stands of the cold rolling mill,the model reduces the rolling force as much as possible while ensuring the reduction rate,which effectively solves the problem of strip cavity opening in the rolling process of the cold rolling mill.After applying the optimization model in a domestic production site,the incidence of strip cavity opening defects decreased by about 6％,which significantly improved the product quality and production efficiency of strip manufacturers.
cold rolling millstrip cavity opening defectstension systemrolling forcestrip quality
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