冷轧过程中板带开腔缺陷研究与改进

Research and improvement of strip cavity opening defects in the cold rolling process

在冷连轧机组生产板带过程中,不合理的轧制工艺参数会导致板带产品发生严重的塑性变形,造成所生产板带在卷取时出现开腔缺陷。为了防止开腔缺陷造成的严重损失,充分结合冷连轧机组的工艺流程和设备特点,通过计算润滑油膜厚度、摩擦因数和轧制力,建立了以预防板带开腔缺陷为目标的张力制度优化模型。该模型通过优化冷连轧机组各机架之间的张力,在保证压下率的同时尽可能降低轧制力,有效解决了冷连轧机组轧制过程中出现的板带开腔问题。在国内某生产现场应用该优化模型后,板带开腔缺陷发生率下降约6%,显著提高了板带生产企业的产品质量与生产效率。

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 prevent 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.