镁合金汽车转向柱支架的压铸模拟仿真

Visualization of Die Casting Magnesium Alloy Steering Bracket

为了观察在不同压射速度下金属液在充型过程中的流动情况,分析缺陷分布与位置,从而确定最佳浇注方案,利用模拟仿真软件FLOW-3D,保持模具温度和浇注温度不变,分别采用压射速度为4.3、6.0、7.8m/s,对镁合金转向器支架进行模拟仿真,观察气孔、缩孔等缺陷的分布。结果发现,在模具初始温度为220℃,浇注温度为700℃的条件下,最优的压射速度应为6.0m/s,此时能达到最佳充型效果。

With a given die temperature and pouring temperature, the Flow-3D software was employed to simulate filling and solidification of liquid magnesium alloy to observe the distribution and potential position of defects including gas hole and shrinkage porosity in the magnesium alloy steering bracket in condition of injection velocities of 4.3, 6.0 and 7.8m/s to determine the optimized pouring parameters. The results reveal that in conditions of the mould initial temperature of 220℃ and pouring temperature of 700℃, the desirable filling effects can be observed with injecting at 6.0 m/s, and qualified steering bracket without gas hole and shrinkage porosity is produced successfully.