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针对冷轧带钢边部板形问题,基于理论分析和工程实际,考虑带钢轧制前后横向厚差、横向位移、跑偏和覆盖率因素,设计了新的板形检测系统。根据板形辊长度、带钢宽度确定宽、窄通道的数量,对带钢边部板形进行必要的精细检测和误差补偿,避免出现较大的在线板形检测误差,使在线检测信号与实际板形状态一致。在板形测控过程中,首先需要分析带钢的横向厚差和横向位移,然后利用板形辊获得实测板形信号并实施必要的误差补偿,最后利用模式识别、目标曲线和控制模型实现板形闭环控制。实例表明,带钢边部覆盖率和跑偏量对板形检测精度、识别效果影响很大,且轧制前后带钢横向厚差变化与板形关系基本对应,提高带钢边部板形测控精度在很大程度上有助于提高轧后带钢的整体产品质量。
Aiming at the problem of strip shape in cold rolled strip, a new strip shape inspection system was designed based on theoretical analysis and engineering practice. Considering the lateral thickness difference, lateral displacement, deviation and coverage factor before and after strip rolling, According to the length of strip roll, strip width to determine the width and the number of narrow channels, the strip edge shape of the strip to make the necessary fine detection and error compensation to avoid large on-line plate-shaped detection error, the online detection signal and the actual Shape consistent state. In the plate shape measurement and control process, we first need to analyze the strip thickness and transverse lateral displacement, and then use the plate roll to obtain the measured plate signal and implement the necessary error compensation, and finally the use of pattern recognition, target curve and control model to achieve the shape Closed-loop control. The example shows that the coverage ratio and deviation of the strip edge have a great influence on the detection precision and recognition effect of the strip shape. The variation of the strip thickness difference before and after rolling basically corresponds with the shape of the strip shape, Accuracy contributes to a great extent to the overall product quality of the rolled strip.