摩擦液柱成形初始阶段的二维轴对称数值模拟  

Numerical Simulation onto the Preliminary Period of Friction Hydro Pillar Processing with Two Dimensional Axisymmetry

作　　者：陈家庆[1] 焦向东[1] 邱宗义[1] 张宝生[1] 周灿丰[1] 陈忠海[1] 

机构地区：[1]北京石油化工学院,北京102617

出　　处：《中国机械工程》2008年第23期2867-2872,共6页China Mechanical Engineering

基　　金：国家自然科学基金资助项目(50675022);国家863高技术研究发展计划资助项目(2006AA09Z329);北京市自然科学基金资助项目(3073017)

摘　　要：基于二维轴对称有限元模型,通过外部施加表面热流强度的手段对摩擦液柱单元成形(FHPP)初始阶段的热力耦合接触摩擦问题进行了数值模拟。结果表明:金属棒接触摩擦表面上的温度上升迅速,当其材料的屈服强度降低到一定值后就会在轴向应力的作用下发生塑性流动,进而对预钻孔底部进行填充;所施加的轴向应力、转速以及金属棒与预钻孔之间的径向间隙对成形过程都有不同程度的影响,轴向应力对成形过程的影响较转速对成形过程的影响略大,而径向间隙对成形过程的影响相对较小。Based on the finite element model of two dimensional axisymmetry and through applying the surface heat flow strength extrinsically, the thermal mechanically coupled analysis was executed to complete the numerical simulation of Friction Hydro Pillar Processing （FHPP） at its preliminary period. It is indicated that, the temperature on the contact surface of metal stud increases rapidly, and the material flow plastically under external load when the yield strength of material decreases to a certain value, and then begin to fill the predrilled hole. The applied external axial stress, the rotary speed, and the clearance between metal stud and predrilled hole all have influence on the filling and forming process to some different degree. The applied external axial stress has more influence than that of the rotary speed, while the influence of radial clearance is relatively small.

关 键 词：摩擦液柱成形 有限元法 热力耦合分析 数值模拟 

分 类 号：TG115.28[金属学及工艺—物理冶金] TG456.28[金属学及工艺—金属学]