凸度板形矢量法在中厚板中的应用

Application of Crown-Flatness Vector Method in Plate Draft Schedule

为了有效控制中厚板板形和发挥轧机生产能力,将凸度 板形矢量分析法应用于中厚板轧制规程的计算·首先分析板凸度计算模型并给出相应的在线数学模型,然后分析了凸度 板形矢量法的机理·并基于该方法分析中厚板伸长阶段的轧制特点,将伸长阶段的规程计算分解成三步:伸长阶段前几个道次在轧机能力允许范围内采用大压下量,减少轧制道次;伸长阶段的后3,4个轧制道次,采用凸度 板形矢量法,控制轧件凸度和板形;通过调节总轧制道次数或最大轧制力限制系数,使得最后道次的出口厚度等于目标厚度·通过长期在线应用,表明该方法对板形有较强的控制能力,适合于中厚板的在线计算机过程控制·

The crown-flatness vector method is applied to the computation of plates' drafting schedule to control effectively the plate crown/flatness and make full use of mill capacity. Analyzing a simple plate crown model and giving an on-line model relevant to it, the mechanism of crown-flatness vector method is discussed, as well as the related plate rolling technology in lengthening phase. Then, the computation for drafting schedule in the phase can break down as three steps below. Decrease the number of several primary rolling passes by way of taking heavy reduction as possible. Take advantage of crown-flatness Vector method to control the crown/flatness of workpiece for the subsequent 3 or 4 passes. Finally, adjust the total number of passes or the coefficient of ultimate rolling force so as to enable the plate gauge of the exit of last pass to be equal to target gauge. The on-line applications for long time showed that the method can strongly control the plate shape and is available to on-line control the plate shape and is available to on-line control of plate rolling process by computer.