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为了减小轧机两侧刚度差,分析确定影响轧机刚度差的关键因素,采用激光跟踪仪对轧机带衬板与不带衬板状态的相对几何位置进行精密检测,发现牌坊衬板磨损、倾斜以及安装面的倾斜等通过造成轧辊轴线交叉进而导致轧机两侧刚度差。通过分析研究实测数据提出了更换定制衬板、研磨安装面等一系列减小轧机两侧刚度差的对策措施,提高了热轧机组各架轧机的两侧刚度差的符合率,其中末架轧机从23%上升到88%,投入生产使用后显著减少精轧机组跑偏与镰刀弯缺陷,并使后工序的堵边率从6.5%下降到2.4%以下,机架间跑偏废钢从平均每月3块降低到连续3个月为零。
In order to reduce the stiffness difference between the two sides of the rolling mill and analyze the key factors that affect the stiffness difference of the rolling mill, the laser tracker was used to test the relative geometrical positions of the rolling mill with or without liner. The wear, Inclination of the mounting surface, etc., results in a difference in rigidity between the two sides of the mill by causing the axes of the rolls to cross. Based on the analysis of the measured data, a series of measures to reduce the stiffness difference between the two sides of the rolling mill, such as the replacement of the liner plate and the grinding and mounting surface, are put forward. The coincidence rate of the difference of the two sides of the rolling stands is improved, From 23% to 88%. After put into production, it significantly reduced the runout and sickle bend defects of the finishing mill and decreased the plugging rate of the post-process from 6.5% to less than 2.4%. From the average Month 3 reduced to zero for three consecutive months.