铝合金气缸盖铸造气孔缺陷分析及解决方法

某型增压发动机铝合金气缸盖采用金属型重力倾转浇注铸造工艺生产时,在凸轮轴座经常出现气孔缺陷。通过CAE铸造工艺模拟,产品结构分析等,找出了气孔缺陷形成的原因。通过优化气缸盖结构、调整铸造工艺参数等措施,消除了气缸盖铸件气孔缺陷,提高了气缸盖铸件出品率,取得了良好的经济效益。

Causes Analysis and Solution of Blowhole Defects in Cast Aluminum Cylinder Heads

When the pressurized aluminum cylinder heads were poured using gravity inclining method, the blowhole defects often occurred at the camshaft seat of cast aluminum cylinder heads. Through analyzing the causes of defect formation and CAE simulation, as well as optimizing the structure of cylinder head and adjusting the pouring process parameters, the blowhole defects at the camshaft seat of cast aluminum cylinder heads were eliminated quite well, which not only improved the yield of castings, but also achieved the better economic benefits.