针对某2250 mm宽带钢轧机出现的带钢断面板廓非对称性问题，提出综合1次楔形与3次楔形的不对称度概念来描述和评价板廓的非对称性。其次，采用压靠法获得轧机的弹跳曲线，并利用基于影响函数法的非对称辊系变形模型，计算分析轧机刚度差对带钢板廓非对称性的影响。在生产中，通过轧机设备关键零部件维修和定量预设定轧辊倾辊量达到对因轧机刚度差而引起的板廓非对称性进行控制和消除，从而保证宽带钢板廓的对称性和轧制稳定性。
Characters of strip contour on 2 250 mm production line were collected. The concept about contour asymmetri-cal character was proposed in a way that asymmetry was expressed by using the degree of asymmetry,which was integrat-ed with linear term and cubic term wedge. This concept can be the base of evaluation and control of strip contour asymme-try. By measuring and analyzing the mill stretch curves under the contact roll condition,it is found that the stiffness differ-ences between operation sides and work sides are obvious and can not be ignored. Roll deformation model of asymmetric rolling mill has been built by using the method of influence function. Through asymmetric rolling model and mathematic model,this paper analyzed the effects on contour asymmetry which was caused by stiffness differences. The strategies in-cluding the maintaining of key components and the preset adjustment of roll incline have been applied in industrial produc-tion and gained satisfying effort.
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