锻压技术

塑性强化材料的十一辊矫平过程数值模拟与工艺分析

英文标题：Numerical simulation and process analysis on eleven-roll leveling process for plastic reinforced materials

分类号：TG306

出版年,卷(期):页码：2021,46(6):84-90

摘要：

以弹塑性双线性硬化模型作为基础理论，利用ABAQUS软件建立十一辊矫平机的动力学模型，在大变形、小残差的压下方案的基础上，结合理论计算的压下方案与现场试验的工艺数据，研究不同的压下方案对板材残余应力以及平直度的影响，并进行实验验证。结果表明：长度方向上的残余应力变化比宽度方向上的残余应力变化大，调节首辊的压下量比调节中间辊的压下量对长度方向上残余应力分布的影响更显著，但是，对于宽度方向上的残余应力几乎没有影响，同时，板材矫平后，边侧的残余应力变化更剧烈；通过工艺分析，确定了原始曲率比Co=3.5、厚度为35 mm的Q690钢材矫平精度最优的压下方案，矫平后，平直度为2.4 mm·m-1，符合国家标准要求，验证了模型的正确性。

Taking the elastoplastic bilinear hardening model as the basic theory, the dynamic model of eleven-roll leveler was established by software ABAQUS. On the basis of the reduction plan with large deformation and small residual error, combining with the reduction plan of theoretical calculation and the process data of field test, the influences of different reduction plans on the residual stress and flatness of plate were studied, and the experimental verification was performed. The results show that the residual stress change in the length direction is greater than that in the width direction, and adjusting the reduction amount of the first roll has a more significant effect on the residual stress distribution in the length direction than the adjustment of intermediate roll, but it has little effect on the residual stress in the width direction. At the same time, the residual stress on the side of plate after leveling changes more drastically. Finally, through process analysis, it is determined that the Q690 steel with the original curvature ratio Co of 3.5 and the thickness of 35 mm has the best leveling accuracy. After leveling, the flatness is 2.4 mm·m-1, which conforms to the national standards and verifies the correctness of the model.

基金项目：

2018年度泰山英才领军人才项目

作者简介：叶冠平（1996-），男，硕士研究生 E-mail：18279181041@163.com 通信作者：武凯（1972-），男，博士，教授 E-mail:wukai@njust.edu.cn

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