二十辊轧机轧制极薄带的板形控制

来源期刊:中南大学学报(自然科学版)2017年第4期

论文作者:肖宏 员征文 任忠凯 余超

文章页码:860 - 867

关键词:二十辊轧机;辊间压扁;有限长半无限体;边界积分方程;极薄带轧制

Key words:20-high mill; roll flattening; finite length semi-infinite body; boundary integral equation method; ultra thin strip rolling

摘    要:针对二十辊轧机辊间压扁计算误差较大的问题,将轧辊视为有限长度的半无限体,基于边界积分方程法建立1个精确的辊间压扁模型;基于该辊间压扁模型、耦合轧辊弯曲模型,轧件塑性变形模型、建立更精确的二十辊轧机板形控制耦合模型。基于该二十辊轧机板形控制耦合模型,针对极薄带轧制工况,分析二十辊轧机第一中间辊锥度、轴向移动、不同压下量等因素对带钢出口厚度、轧制力分布、辊间压力分布等的影响规律,并通过实验方法验证该理论模型的正确性。研究结果表明:第一中间辊的锥度和轴向移动对板形控制具有较大的影响,而且辊缝形状的微小改变会引起板形产生较大变化。

Abstract: To improve the accuracy of roll flattening calculation for 20-high mill, a new and more accurate roll flattening model was proposed. In this model, the roll barrel was considered as a finite length semi-infinite body. Based on the boundary integral equation method, an accurate roll flattening model was established. Based on the new roll flattening model, coupled with roll bending model, strip plastic deformation model, a new and more accurate plate control model for 20-high mill was established. Based on the new model, for the particularly thin strip rolling process, the effects of taper angle and axial shift of the first intermediate roll were analyzed, and the accuracy of the new model was certified by rolling test. The results show that the taper angle and axial shift of the first intermediate roll have greater influence on the shape control, and small changes in the shape of the roll gap will cause great changes of flatness.

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