滤清器壳体压铸工艺设计及数值模拟

根据滤清器壳体的结构特点,设计了压铸工艺方案,采用Flow-3D软件对压铸工艺方案进行数值模拟,通过分析卷气的分布情况预测产生缺陷的位置。初始方案模拟结果表明,型腔中间及两端存在较多卷气,容易产生气孔、缩松等缺陷。通过温度场分布判断压铸件凝固方式为逐层凝固,说明充型过程合理。优化方案调整了浇注系统的形状和位置,增强了溢流槽收集气体的能力。结果表明,铸件内卷气明显下降,缺陷消除,满足生产要求。

Numerical Simulation and Die Casting Process of Aluminum Alloy Upper Cover

According to the structural characteristics of the filter housing,the die casting process was designed.The Flow-3 Dsoftware was used to simulate the die casting process,and position of the defect was predicted based on the distribution of the entrained air.The simulated results of the initial scheme reveal that there exist more entrained air in the middle and both ends of the cavity,resulting in defects such as blowholes and shrinkage porosity.It is judged by the temperature field distribution that the solidification mode of the die casting belongs to solidified layer by layer,indicating the reasonable filling process.Through adjusting the shape and position of the gating system,the ability of the over-flowing slots to collect entrained air was enhanced.The results reveal that the entrained air in the filter housing is reduced significantly,and the defects are eliminated,meeting production requirements.