铝带快速铸轧机轧辊强度的有限单元法分析

FEM analysis of casting roller intensity under aluminum strip high-speed casting condition

在铝带快速铸轧新技术与设备的研制开发中 ,由于铸轧辊工作在高温、高压力、高轧制速度的条件下 ,而且铸轧辊与铸轧产品质量的各种指标有着直接的关系 ,因此 ,其强度设计是关键技术之一 .作者运用有限元软件Al gor和工程技术语言Matlab编程对 2套某厂正常使用的铸轧辊以及针对快速铸轧而设计的铸轧辊进行了强度仿真计算和分析 ,采用将辊套和辊芯之间的热装配应力、扭矩产生的剪应力和轧制力产生的轧制应力三者分别进行预处理后再叠加 ,然后进行应力场综合分析计算的方法 ,获得了快速铸轧状态下铸轧辊在热装配预应力、轧制扭矩以及轧制力等多应力场条件下更符合工况的综合应力状态 .此外 ,探讨了改善铸轧辊应力状态的策略及方法 ,为实现铸轧辊适应铝材快速铸轧工艺提供了一种新的分析及设计方法 ,这对改善铸轧辊的强度设计具有指导意义 .

In the development of new technology and equipment on aluminum strip high speed casting, casting roller is working under the conditions of high temperature, great pressure and high casting speed, furthermore casting roller has direct relations with all kinds of quality indexes of casting products, so the intensity design of casting roller is the key technology. With the help of FEM software Algor and language of technical computing Matlab, the authors simulates and computes intensity of two casting rollers in working and the other two casting rollers that are designed for high speed casing. At first heated assembling stress between roller cover and roller core, cut stress brought by casting moment and casting stress brought by casting force are treated, then they are added together to be analyzed synthetically for stress field. The author gets the stress condition with a better accuracy of casting roller under heated assembling fore stress, casting moment and casting force in this new way. In the conclusions strategy and methods to improve the stress condition of casting roller are offered. A new analyzing and designing way is offered to fit the process of aluminum strip high speed casting and it is instructive to improve the intensity designing of casting roller. [