基于弹性模量变化的管材绕弯截面畸变有限元分析  

Finite element analysis on cross-section distortion in tube rotary drawbending based on variation of elastic modulus

作　　者：万涛[1] 方军[1] 欧阳芳 尚文瑄 鲁世强[2] 王克鲁[2] Wan Tao;Fang Jun;Ouyang Fang;Shang Wenxuan;Lu Shiqiang;Wang Kelu(School of Information and Mechatronics Engineering,Jiangxi Science and Technology Normal University,Nanchang 330038,China;School of Aeronautical Manufacturing Engineering,Nanchang Hangkong University,Nanchang 330063,China)

机构地区：[1]江西科技师范大学信息与机电工程学院,江西南昌330038 [2]南昌航空大学航空制造工程学院,江西南昌330063

出　　处：《锻压技术》2024年第3期52-59,共8页Forging & Stamping Technology

基　　金：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)。

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f_(m)、管材与压力模之间的间隙C_(p)、管材与芯模的间隙C_(m)的增大或管材与压力模之间的摩擦因数f_(p)、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f_(m)、C_(m)、f_(p),而对C_(p)最不敏感;最佳工艺参数范围为:f_(p)=0.25~0.40、f_(m)=0.05~0.15、C_(p)=0.075~0.100 mm、C_(m)=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 f_(m) between tube and mandrel,clearance C_(p) between tube and pressure die,clearance C_(m) between tube and mandrel or with the decreasing of friction factor f_(p) between tube and pressure die,axial feeding e of mandrel,and the cross-sedion distortion is most sensitive to e,followed by f_(m),C_(m) and f_(p),while that is least sensitive to C_(p).The optimal process parameters range are as follows:f_(p)=0.25-0.40、f_(m)=0.05-0.15、C_(p)=0.075-0.100 mm、C_(m)=0.075-0.150 mm、e=0.5-2.0 mm.

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[金属学及工艺—金属压力加工]