轧机卷取机卷筒花键套的失效分析及结构改进

Failure analysis and optimal improvement of spline sleeve on coiler mandrel in rolling mill

针对某公司2台四立柱二十辊可逆轧机的左右卷取机所使用花键套自投产后实际工作时间仅680天即出现法兰开裂或断裂,阻碍了轧机的正常生产。本文基于Solidworks对花键套受力情况进行仿真,并经过有限元运算后,对其结构重新优化改进。提出了将整体花键套在带孔法兰处分为前后剖分式结构,前部法兰材质使用高强度合金钢,后部仍采用原铜材料,前后部分通过圆柱面定位,形成组合式花键套,提高了安全系数、减少了变形,解决了花键套法兰开裂或断裂的问题。

As for the problem of normal production was obstructed due to the cracking or fracturing of flange of spline sleeve used in the left and right coiler of two sets of four-column twenty rollers which the actual working hours was only 680 days after putting into production in certain company.This paper simulated the force of spline sleeve based on solid works and optimally improved its structure by finite element calculation.It proposed that the whole spline sleeve on the flange with holes should be divided into front and back structure with front flange using high strength alloy steel and the back using copper.The front and back parts are positioned by a cylindrical surface to form combined spline sleeve,which improves safety factor,reduces distortion and solves the problems of cracking and fracture of flange in spline sleeve.