BFe10-1-1铜管扩径拉拔形变分析及其力能预测  

Expansional drawing deformation analysis and force prediction for BFe10-1-1 copper tube

作　　者：邓同生 李尚 李升燕 苟伟 赵鸿金[1] DENG Tong-sheng;LI Shang;LI Sheng-yan;GOU Wei;ZHAO Hong-jin(Faculty of Materials Metallurgy and Chemistry,Jiangxi University of Science and Technology,Canzhou 341000,China)

机构地区：[1]江西理工大学材料冶金化学学部,江西赣州341000

出　　处：《塑性工程学报》2021年第2期117-124,共8页Journal of Plasticity Engineering

基　　金：国家重点研发计划项目(2016YFB0301400);江西省科技厅资助项目(20192BAB216005);江西省教育厅资助项目(GJJ170550)。

摘　　要：为研究实际生产中大口径铜管的扩径拉拔工艺,基于等比例缩小原则,通过理论解析、有限元仿真和实验验证3种途径对BFe10-1-1铜管扩径拉拔的形变规律及扩径力进行研究,探讨了关键工艺参数对扩径过程的影响规律。结果表明:扩径力随扩径系数、管材壁厚和摩擦系数的增大而增大,随模芯半锥角的增大先减小后增大,在模芯半锥角为12°左右时可获得最小扩径力。理论和有限元预测的扩径力与实测值吻合良好,当扩径系数为1.1时,压入扩口时的扩径力理论和有限元预测值与实验值的相对误差分别为4.1%和0.8%,拉伸扩径时的扩径力理论和有限元预测值与实验值的相对误差分别为3.3%和4.4%。To Study the expansional drawing process of copper tube with large diameter in actural production,three ways namely theoretical analysis,finite element simulation and experimental verification were carried out to investigate the deformation law of expansional drawing and expanding force of BFe10-1-1 copper tube based on the principle of equal scale reduction.The influence law of key process parameters on expanding process was discussed.The results show that the expanding force increases with the increase of expansion ratio,tube wall thickness and friction coefficient and decreases first and then increases with the increase of semi-cone angle of die core.The minimum expanding force can be obtained at semi-cone angle of die core of about 12°.The expanding force predicted by theory and finite element is in good a grement with the measured value.When the expansion ratio is 1.1,the relative errors between the theoretical and finite element prediction values and the experimental values for the compression force are 4.1% and 0.8%,respectively,and the relative errors between the theoretical and finite element prediction values and the experimental values for tensile expansion force are 3.3% and 4.4%,respectively.

关 键 词：铜管 扩径拉拔 理论解析 数值模拟 力能预测 

分 类 号：TG356.5[金属学及工艺—金属压力加工]