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为了高精度预测中厚板轧件的头尾舌形量,从而为平面形状控制提供相关参数,以理论分析为基础,提出了头部微单元的概念,构造了舌形缺陷的预测模型。模型从体积守恒的角度出发,证明了舌形缺陷的体积来自于头部微单元,并通过推导得出了将距离轧件边部0.2倍宽度处的舌形量作为舌形缺陷的标识量比较合适。模型最终将舌形缺陷的标识量解耦为轧件的伸长率和头部微单元长度的乘积。在构建了头部等效微单元的量化模型的基础上,得到了舌形缺陷的预计算模型。将此模型实际应用于某中板厂3000轧机轧件舌形缺陷的预测中,取得了良好的效果。
In order to predict the head and tail tongue shape of the plate rolling with high accuracy, the related parameters are provided for the control of the plane shape. Based on the theoretical analysis, the concept of the head microunit is proposed and the prediction model of the tongue flaw is constructed. From the perspective of conservation of volume, the model proves that the volume of the tongue-shaped defect is from the head micro-unit and the tongue-shaped quantity 0.2 times the width from the edge of the rolled piece is used as the identification quantity of the tongue-shaped defect Suitable. The model eventually decouples the identification of the tongue defect as the product of the elongation of the rolled stock and the length of the head microcell. On the basis of constructing the quantitative model of head equivalent micro-unit, the pre-calculation model of the tongue-shaped defect is obtained. The model is applied to the prediction of the tongue-shaped defects of the rolling mill of a medium-plate mill 3000 and has achieved good results.