非对称扰动下热轧铝带跑偏过程三维数值模拟  

3-D Numerical Simulation of Aluminum Strip Steering Process under Asymmetric Variations in Hot Rolling

作　　者：赵先琼[1] 刘义伦[1] 付卓[1] 林丹[1] 

机构地区：[1]中南大学机电工程学院,湖南长沙410083

出　　处：《湖南大学学报（自然科学版）》2011年第7期37-42,共6页Journal of Hunan University:Natural Sciences

基　　金：教育部科学技术研究重点项目(106123)

摘　　要：基于大型工程分析软件MSC.Marc,设计了模拟Fi机架轧制过程的三维有限元模型,结合实验研究得到的1235铝合金高温本构方程,模拟出非对称性扰动下,热轧铝合金板带跑偏状态;研究了板带在来料厚度分布横向非对称、辊缝形状横向非对称及来料不对中扰动下,轧制力、板带运动轨迹等轧制参数的横向非对称性;探讨了板带跑偏与轧制力、压下率等轧制参数的横向分布特征的相关性.研究结果表明:不同扰动下板带的跑偏方向与两侧轧制力差的关系并不一致,不能根据轧制力差判断板带的跑偏方向;压下率差与跑偏方向具有一致性,板带由压下率大的一边向压下率小的一边跑偏,这一规律为无法明确扰动的板带纠偏策略提供了理论参考.Based on the large project analysis software MSC. Marc, a 3D finite element model was designed to simulate the rolling process of Fi stand. Simulation of the strip＇s steering state was done under asymmetrical variations and the high temperature constitutive equations of 1235 aluminum were obtained from experiments. The asymmetry of the rolling force, strip trajectory and other rolling parameters were studied under asymmetric distribution of incoming thickness, asymmetric shape of rolling gap and incoming un-centering. Then the relevance between the strip steering and the horizontal distribution of rolling parameters, such as the rolling force and the reduction rate, was discussed. The result has shown that the relationship between the strip steering direction under various disturbances and the difference on both sides of rolling force cannot determine the steering direction of the strip according to the difference under the rolling force. The difference of reduction rate is consistent with the steering direction, and strip steering is always from the larger reduction rate side to the smaller side. This result provides a theoretical reference for strip correcting strategies when the variations are uncertain.

关 键 词：热轧 铝板带 板带跑偏 数值模拟 

分 类 号：TG335.5[金属学及工艺—金属压力加工]