锻压技术

基于弹性模量变化的管材绕弯截面畸变有限元分析

英文标题：Finite element analysis on cross-section distortion in tube rotary draw bending based on variation of elastic modulus

作者：万涛1 方军1 欧阳芳 2 尚文瑄1 鲁世强2 王克鲁2

单位：1. 江西科技师范大学 2. 南昌航空大学

关键词：高强不锈钢管绕弯截面畸变率弹性模量多因素敏感性分析

分类号：TG386

出版年,卷(期):页码：2024,49(3):52-59

摘要：

为了实现0Cr21Ni6Mn9N高强不锈钢管材精确绕弯成形，建立了考虑弹性模量变化的管材绕弯成形全过程有限元模型，研究了工艺参数对管材绕弯截面畸变的影响，并分析了截面畸变对工艺参数的敏感性。结果表明：考虑弹性模量变化时，截面畸变率的变化趋势与未考虑弹性模量变化时基本一致，但数值较大，且更接近实验结果；截面畸变率随着管材与芯模之间的摩擦因数fm、管材与压力模之间的间隙Cp、管材与芯模的间隙Cm的增大或管材与压力模之间的摩擦因数fp、芯模伸出量e的减小而增大；截面畸变对e最为敏感，其次依次为fm、Cm、fp，而对Cp最不敏感；最佳工艺参数范围为：fp=0.25~0.40、fm=0.05~0.15、Cp=0.075~0.100 mm、Cm=0.075~0.150 mm、e=0.5~2.0 mm。

To realize the precise rotary draw bending forming of 0Cr21Ni6Mn9N high-strength stainless steel tube, the whole process finite element model of tube rotary draw bending considering the variation of elastic modulus was established, the impacts of process parameters on cross-section distortion during the tube rotary draw bending were investigated, and the sensitivities of cross-section distortion to process parameters were analyzed. The results indicate that when considering the variation of elastic modulus, the variation trend of cross-section distortion rate is basically the same with that without considering the variation of elastic modulus, but the value is relatively large and is closer to the experimental results. The cross-section distortion rate increases with the increasing of friction factor fm between tube and mandrel, clearance Cp between tube and pressure die, clearance Cm between tube and mandrel or with the decreasing of friction factor fp between tube and pressure die, axial feeding e of mandrel, and the cross-sedion distortion is most sensitive to e, followed by fm, Cm and fp, while that is least sensitive to Cp. The optimal process parameters range are as follows：fp=0.25-0.40、fm=0.05-0.15、Cp=0.075-0.100 mm、Cm=0.075-0.150 mm、e=0.5-2.0 mm.

基金项目：

江西省自然科学基金资助项目（20192BAB216022）；江西省教育厅科学技术研究项目（GJJ201126,GJJ180615）

作者简介：万涛（1974-），男，学士，讲师,E-mail：490255128@qq.com;通信作者：方军（1984-），男，博士，副教授,E-mail：fangjun020j13@163.com

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