热轧带钢卷取塔形问题分析及控制措施

Analysis of Telescoping Problem of Hot Strip in Coiling and Control Measures

通过对生产过程的分析,卷取塔形主要由带钢头部不均匀受力产生的内塔形及尾部张力减少产生的外塔形导致。改造卷取机侧导尺平行度及短行程控制时序,解决了内塔形的问题;上夹送辊凸度为0.75mm,下夹送辊凸度为1.5mm,合理配置辊型;同时开发了夹送辊压力修正功能并优化卷取机张力设定。优化改进后,由于塔形问题产生的次品量减少60%,提高了热轧带钢综合合格率。

Based on analysis of production process, the telescoping problem resulted in inner telescoping generated by uneven force of the strip head and outside telescoping caused by tail tension reduction. The side guide ruler parallelism of the coiler and short stroke control sequence were transformed, resolving the inner telescoping. The upper pinch roll crown was 0.75 mm, lower pinch roll crown was 1.5 mm and then the roller type was rationally allocated. At the same time, the pinch roller pressure correction function was developed and the eoiler tension setting was optimized. After optimization and improvement, the defective products due to telescoping were reduced by 60% and the comprehensive qualified rate was increased.