冷轧连续退火炉加热段出口带钢跑偏研究

Study on strip running deviation at exit of heat section in continuous annealing furnace for cold rolling

针对冷轧板带在连续退火炉加热段出口＂蛇形跑偏＂以及瞬间跑偏问题,计算连续退火炉炉辊热凸度,用回归的方法确定炉辊热凸度对跑偏的影响。进而设计出加热段出口防跑偏预警程序,能对带钢在加热段出口跑偏进行预警,并及时调整加热段模型参数以及升降温速率。将该程序应用于首钢京唐冷轧某连退机组,解决了由于炉辊热凸度变化导致的带钢在加热段出口跑偏问题。

In order to solve strip reciprocating and quick-moving running deviation at the exit of heat section for vertical continuous annealing furnace,the thermal crown of furnace roller was analyzed quantitatively and regression method was used to determine the impact of roller crown on strip running deviation.And then the alarm program for strip running deviation was established,which can give early warning of strip running deviation and adjust the model parameter and the heating and cooling temperature rate simultaneously.With the application of this system on a continuous annealing machine for cold rolling in Shougang Jingtang Company,the strip running deviation which caused by thermal crown of furnace roller can be solved.