CVC热连轧机支持辊不均匀磨损及辊形改进

非对称的CVC工作辊与对称支持辊辊形配置易导致下游机架支持辊辊形自保持性差.利用ANSYS有限元软件分析F4机架常规支持辊磨损对轧机板形调控性能及辊间接触压力分布的影响,发现严重的支持辊不均匀磨损会影响轧机的板形控制稳定性,并导致支持辊剥落增加辊耗.基于有限元分析提出一种新的支持辊辊形,实验证明新辊形具有良好的自保持性,可在整个服役期内稳定发挥其性能,并在支持辊服役后期缓解辊间接触压力尖峰的出现.

Characteristics of backup roll wear contour in a CVC continuous hot rolling mill

The configuration of dissymmetrical CVC work roll contour and symmetrical conventional backup roll contour results in bad self-maintenance of backup rolls in downstream stands. After the analysis on the effects of backup roll wear contour in No. 4 stand on the profile control and roll contact pressure distribution by ANSYS finite element method, it was found that the severe wear of the backup roll affected the controllability of the mill for the profile and flatness of products, and led to the spalling accident of the backup roll, which may increase roll consumption. Based on the ANSYS analysis, a new backup roll contour was proposed, which was proved of good self-maintenance by experiment, and could work well during the whole service period, especially could mitigate the roll contact pressure peak of backup roll wear contour.