压扁加反弯矫直是提高小断面管材矫直精度的有效方法,针对矫直过程中压扁量不易确定的问题,利用大型非线性有限元软件建立小断面管材二辊矫直过程的三维弹塑性有限元模型,研究了不同压扁量时接触长度、矫直力、残余应力、直线度和椭圆度的变化情况。经综合分析后给出合理的压扁量取值范围为0.45~0.70 mm。现场试验结果表明,参考此压扁量取值范围来调节辊缝可以得到很好的矫直效果,减少了辊缝调节时间。 Compression and anti-bending straightening is an effective method to improve the straightening precision of small section pipe. In view of the problem that the flattening amount can not be easily determined during the straightening process, a large-scale nonlinear finite element software is used to establish the three-dimensional Elastic-plastic finite element model, the contact length, straightening force, residual stress, straightness and ovality under different crush amount were studied. After a comprehensive analysis, the reasonable range of crush is 0.45 ~ 0.70 mm. Field test results show that, with reference to the value range of the amount of crush to adjust the roll gap can be a good straightening effect, reducing the roll gap adjustment time.