皮尔格轧机冷轧不锈钢管回弹预测模型的建立与验证

发布时间：2018-04-09 18:06

本文选题：分段非线性本构方程　切入点：增量理论　出处：《四川大学学报(工程科学版)》2015年02期

【摘要】：以皮尔格LG60轧机轧制304不锈钢管为例,研究皮尔格轧机冷轧不锈钢管回弹预测模型。首先通过单向拉伸试验及数据处理的方法得到材料的分段非线性本构方程;其次根据钢管轧制的塑性变形规律结合增量理论,得到变形过程中各应变分量的计算方法,并把钢管变形过程中的受力状态由三向应力状态转化为单向应力状态,利用材料的卸载定律建立冷轧钢管的回弹预测模型;最后通过大型有限元模拟软件DEFORM-3D进行完整轧制过程的3维有限元模拟仿真,并利用皮尔格轧机进行实际轧制试验验证来检验回弹预测模型的可靠性与正确性。结果表明,本模型精度较高,对皮尔格轧机孔型设计及实际生产中成品管尺寸精度控制有重要指导意义。
[Abstract]:The springback prediction model of 304 stainless steel tube rolled by Pilger LG60 mill was studied.Firstly, the piecewise nonlinear constitutive equation of the material is obtained by uniaxial tensile test and data processing, and then, according to the plastic deformation law of steel tube rolling and the increment theory, the calculation method of each strain component in the process of deformation is obtained.The stress state in the process of steel tube deformation is transformed from the three-way stress state to the unidirectional stress state, and the springback prediction model of cold-rolled steel pipe is established by using the unloading law of the material.Finally, the 3D finite element simulation of the complete rolling process is carried out by the large-scale finite element simulation software DEFORM-3D, and the reliability and correctness of the springback prediction model are verified by the Pilger rolling mill.The results show that the model has a high precision and has important guiding significance for the pass design of Pilger mill and the precision control of the finished product tube in production.
【作者单位】：太原科技大学重型机械教育部工程研究中心;
【基金】：国家自然科学基金资助项目(51105264) 太原科技大学博士基金资助项目(201117) 山西省青年基金资助项目(2012021019-5)
【分类号】：TG335.7

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