铜管游动芯头拉拔模具角度优化的有限元模拟

FEM simulation of the optimization of the die angle with the floating plug drawing process of copper tubes

采用二维轴对称弹塑性有限元法对比分析了不同外模模角和游动芯头锥角的配合对拉拔铜管的影响。模拟结果表明,最优外模模角和芯头锥角配合与拉拔应力、摩擦力和芯头稳定位置等因素有关,外模模角、芯头锥角以及两者之间的角度差过大或过小都对铜管的质量不利,这对于精密铜管游动芯头拉拔模具角度的选择,有着一定的参考价值。

This paper focuses on the comparison of the matching of dies and floating plugs with different angle with the aid of 2D axisymmetric elastic-plastic FEM and the influence of drawing copper tubes. Simulation results show that the optimum matching with the die angle and the plug cone angle are affected by drawing stress, friction force, and the stability position of floating plug and so on. Copper tubes' quality is affected severely by too big or too small angle of the die, the plug cone and the difference between them.