带夹层不锈钢复合板异步轧制力数学模型研究

 为实现带夹层复合板异步轧制力的预报,对直接添加薄板作为中间层的不锈钢复合板进行受力分析,依据各层金属变形特点以及轧件摩擦力方向的变化,将轧制变形区划分为5个分区,考虑复合板单元体截面法向应力与剪应力在各层金属间的线性分布,借助各个分区力平衡方程,建立了带夹层复合板异步轧制力数学模型;研究了剪切屈服应力比、辊径比、摩擦因数比对各层单元体应力分布的影响以及不同压下率下中性点和连接点的位置变化规律;运用MSC.Marc有限元仿真软件,对316L/Ni/EH40复合板进行了5道次异步轧制仿真,轧制变形区受力状态与理论模型基本一致,各道次轧制力大小与理论计算值误差在10%以内,结果表明,本模型可为带夹层复合板异步轧制力精准预报提供理论指导。

Research on mathematical model of asymmetric rolling force of sandwich clad plate

In order to realize the prediction of the asymmetric rolling force of the sandwich clad plate, a force analysis was performed on a stainless steel clad plate in which a thin plate was directly added as an intermediate layer. The rolling deformation zone was divided into five zones according to the deformation characteristics of each metal layer and the change of the rolling frictional direction. The linear distribution of the normal stress and shear stress at the vertical sides of each slab between the layers of the metal was considered. The effects of shear yield stress ratio, roll diameter ratio and friction coefficient ratio on the stress distribution of each layer element and the positional changes of neutral point and connection point under different reduction ratios are studied. Five-pass asymmetric rolling simulation of 316L/Ni/EH40 clad plate is carried out using MSC.Marc finite element simulation software. The stress state of the rolling deformation zone was consistent with the theoretical model. The error between the rolling force and the theoretical calculation value of each pass was within 10%.The results show that the model can improve the accurate prediction of the asymmetric rolling force of sandwich clad plate.