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薄板冷连轧机组轴承烧损事故逐渐增多,造成经常停机更换圆锥滚子轴承。根据故障产生的特点,轴承烧损大多集中在轧制功率高的轧辊上。现场发现由于存在过大的轴向力,使得载荷集中到2列甚至1列轴承上。测量数据分析发现轧制时的轴向力随着轧机牌坊的磨损程度——轧辊与轧制中心线的倾斜程度加大。通过更换轧机牌坊的衬板,修复牌坊的几何尺寸,更换轧辊轴承箱的衬板,修复轧辊轴承箱的几何尺寸,使轧辊轴承的烧损下降到过去水准的三分之一以下,保证薄板冷连轧机组安全运行。
Sheet cold rolling mill bearing burning accident gradually increased, resulting in frequent downtime to replace tapered roller bearings. According to the characteristics of the fault, bearing burning mostly concentrated in the high rolling power of the roll. The scene found that due to the existence of excessive axial force, making the load concentrated to two or even a row of bearings. Measurement data analysis found that the rolling axial force with the wear and tear of the mill arch - roll and rolling centerline tilt increased. Replacing the mill’s liner, repairing the geometric dimensions of the archway, changing the liner of the roll bearing box, repairing the geometric dimensions of the roll bearing box, reducing the burning of the roll bearing below one-third of the previous level, ensuring that the sheet is cold Continuous rolling mill safe operation.