锻压技术

TP2内螺纹铜管滚珠旋压成形缺陷模拟与分析

英文标题：Finite element simulation and analysis of ball spinning defects of TP2 inner-grooved copper tubes

作者：刘劲松叶能永张士宏唐伟东

单位：沈阳理工大学中国科学院

关键词：TP2内螺纹铜管滚珠旋压折叠缺口

分类号：TG37

出版年,卷(期):页码：2011,36(5):46-50

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.

基金项目：

国家自然科学基金资助项目（50474059）

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