2 250 mm带钢热连轧机板形调控性能改善与提高

以2 250 mm热连轧精轧机为对象,通过有限元仿真,针对末机架在轧制薄带钢时因出现工作辊端部压靠而引起的整机板形控制性能劣化问题,进行了多种工况的定量研究,得出轧件规格和轧制力对工作辊端部压靠的产生及压靠程度的影响,揭示了工作辊端部压靠对轧机板形控制性能的严重负面影响.通过比较研究轧机抵抗工作辊端部压靠的能力,提出了采用基于变接触轧制策略的变接触支承辊初始辊形设计的技术对策,并在投入实际生产使用后取得了明显效果.

Improvement on Shape Control Performance on Finishing Train of 2 250 mm Hot Steel Strip Mill

For 2250mm hot continuous rolling mill,the investigation was carried out to study on the work roll end contact during rolling at last stand using Finite Element Method(FEM),Roll contact deteriorates shape controling performance.The influence of strip specification and rolling force on roll contact was obtained by calculation,and negative effect of roll contact on shape controling performance was also revealed.By comparative study,varying contact-length backup roll(VCR) as a technical countermeasure was proposed and,good effect was obtained in production.