基于ANSYS CFX的三维打印喷头结构优化设计

Structure optimization design of 3D printing head based on ANSYS CFX

喷头结构是影响三维打印成形效果的主要因素。通过Pro/e建立了喷头的三维模型,利用ANSYS CFX对其流场进行了有限元分析并优化了结构参数。结果表明,出口直径一定时,入口直径越小,喷头所受到的压力越小,流动性能越好;收敛角在小于90°时,收敛角越小越有利于流体流动,收敛角大于90°时,角度越大阻力小幅度减小;过渡圆弧半径越大,流体流动状态越好。

The structure of printing head is one of the key factors that affect the formation of 3D print- ing. The 3 D model of head was established by Pro/e, finite element analysis was conducted to simulate the flow field and optimize the structure parameters using ANSYS CFX. The results show that, when the outlet diameter is fixed, the smaller the inner diameter is, the better fluid ability would gained, as less pressure is needed for printing. When the convergence angle is below 90 degree, the smaller con- vergence angle means better fluid ability and while the angle is greater than 90 degree, the resistance decreases slightly if the convergence angle increases; Larger transition arc radius means better state of fluid flow.