针对某冷轧厂酸轧线上的张力辊工作时焊缝出现整圈脱落的问题,对张力辊进行三维建模,并采用整体模型和子模型有限元分析结合的方法,运用疲劳分析理论,找出了张力辊外侧腹板与辊轴间的焊缝出现整圈脱落的原因,并提出相应的改造方案,取到了较好的效果,保证了生产的正常进行。 Aiming at the problem that the whole seam of weld bead appears when the tension roller on a sour rolling line of a cold rolling mill works, a three-dimensional modeling of the tension roller is carried out. By using the combination of the whole model and the finite element analysis of the sub-model, the fatigue analysis theory Out of the tension roller outside the web between the roller and the roll between the whole ring off the reason, and put forward the corresponding transformation program, achieved good results, to ensure the normal production.