针对棒材实际矫直过程中辊缝不易确定的问题,采用大型非线性有限元软件建立棒材二辊矫直过程的三维弹塑性有限元模型,基于该模型研究了不同辊缝下矫直力、成品棒材残余应力、最大挠度和塑性变形深度的变化规律,综合分析提出合理的辊缝取值范围,并在实际生产中得到应用,减少了实际生产中辊缝调节所需时间。 Aiming at the problem that the roll gap can not be easily determined in the actual straightening process, a three-dimensional elasto-plastic finite element model of the two-roll bar straightening process is established by using a large-scale nonlinear finite element software. Based on the model, the straightening force , The residual stress of the finished bar, the maximum deflection and the plastic deformation depth. The reasonable range of the roll gap is put forward and applied in the actual production, which reduces the time required for the roll gap adjustment.