TP2内螺纹铜管滚珠旋压成形缺陷模拟与分析  

Finite element simulation and analysis of ball spinning defects of TP2 inner-grooved copper tubes

作　　者：刘劲松[1,2] 叶能永[1] 张士宏[2] 唐伟东[2] 

机构地区：[1]沈阳理工大学材料科学与工程学院,辽宁沈阳110168 [2]中国科学院金属研究所,辽宁沈阳110016

出　　处：《锻压技术》2011年第5期46-50,共5页Forging & Stamping Technology

基　　金：国家自然科学基金资助项目(50474059)

摘　　要：针对折叠和缺口两种缺陷,在现场工艺参数的基础上运用有限元软件MSC.Marc分别建立了TP2内螺纹铜管滚珠旋压有限元模型,通过模拟和力学分析相结合的方法分析了折叠和缺口的形成过程和产生的原因。结果表明:减小减径拉拔后的管坯壁厚和增大芯头的齿顶圆角可增大齿顶圆弧的曲率,避免缺口形成。此外,增大芯头的齿顶圆角还可增强成齿变歪后的对中性,避免产生折叠。According to the defects of folding and notch,finite element models of ball spinning of TP2 inner-grooved copper tubes were established separately on the basis of actual field processing parameters using finite element software MSC.Marc.The forming process and cause were analyzed through the simulation and mechanical analysis.The results show that notches can be avoided by increasing the addendum arc＇s curvatures which can be increased through decreasing the tubes＇ wall thickness after reducing diameter drawing process and increasing the core-head＇ addendum fillet.In addition,the formed teeth neutral can be also enhanced by increasing the addendum fillet of the floating mandrel in order to avoid forming the folding defects.

关 键 词：TP2内螺纹铜管 滚珠旋压 折叠 缺口 

分 类 号：TG376[金属学及工艺—金属压力加工]