1780生产线的带钢宽度控制

Width Control of Strip in 1780 Production Line

为了满足客户对宽度指标的要求，对承钢1780生产线宽度控制模型进行了研究和分析。根据研究结果，采用粗轧下表面高温计，并且设计板坯出炉温度预测模型，减少因板坯温度不准对宽度控制的影响。通过在加热炉前安装板坯测宽仪和优化宽度控制策略来减少因板坯宽度不稳定对宽度控制的影响。对立辊短行程控制曲线进行研究，提出优化方案，有效解决了带钢头尾宽度问题；对大量带钢精轧宽展数据进行研究，提出针对不同规格带钢的宽展控制方案。经过研究和优化使成品宽度的波动明显变小，成品宽度在＋0～9mm内的命中率达到96％以上，工序控制能力也得到了明显提高，提高了产品的用户满意度。

In order to meet customer demand for the width of the index, the width control model was analyzed in the Chenggang 1780 plant. According to the research results, through using pyrometer of roughing mill under the line, the temperature prediction model of slab was built to reduce the influence of slab temperature to the width control. The effect of instable slab width on the controlled width was decreased through installing the slab width gauge and optimizing the width control strategy. Through investigating the edger curve of short stroke control, the optimizing scheme was put forward to effectively solve the problem of the head and tail width of strip steel. The strip spread control scheme is present according to different specifications. The fluctuation range of width can be decreased significantly through mentioned above measures. For example, the hit rate of finished width from 0 to 9 mm can reach above 96%, and within the scope of process control ability can be improved obviously. The higher degree of user satisfaction is also achieved.