皮尔格冷轧过程钢管周期送进量优化模型的建立与验证

Establishment and validation of steel pipe cycle feed rate optimization model for Pilger cold-rolling process

以皮尔格轧机冷轧304不锈钢管为例,建立周期送进量优化模型。通过对拉伸试验获得的应力-应变曲线进行非线性拟合得到材料的本构关系方程;通过对钢管变形特征的分析得到了基于增量理论的钢管当量应变的计算方法;根据皮尔格轧制钢管截面变形特点导出截面横移量的计算方法;综合利用上述结果以及材料卸载定律解出冷轧304不锈钢钢管在指定回弹量下的周期送进量;通过有限元仿真和现场轧制试验验证了周期送进量优化模型的正确性。为皮尔格轧制工艺参数选择奠定理论基础。

This paper took the cold-rolling 304 stainless steel pipe by pilger mill as an example and the optimi- zation model of the periodical feed rate was established. The material true stress-strain curve was obtained through tensile test and the constitutive equation of 304 stainless steel was gained on the basis of nonlinear fit- ting method. The calculation method of the equivalent strain was obtained according to the steel pipe deforma- tion feature analysis based on the incremental theory. The calculation method of the roll shift of the section was deduced according to steel pipe section deformation feature. The periodical feed rate of cold-rolling 304 stainless steel was solved by using the above results and the law of material＇ s unloading. The correctness of the optimiza- tion model was verified by finite element simulation and actual rolling test. The research can provide theory ba- sis to the process parameters selection for the roiling.