基于3D打印技术的气缸盖自补缩低压铸造工艺优化研究

Optimization of Cylinder Head Self-Feeding Low Pressure Casting Process Based on 3D Printing Technology

某型号铝合金气缸盖采用传统低压铸造工艺生产时,喷油器孔附近频繁出现气孔和缩松缺陷,导致铸件出现渗漏现象。采用MAGMA铸造过程模拟仿真软件对铸造工艺进行模拟仿真优化,结合3D打印砂芯技术,通过优化铸造工艺设计、调整低压铸造曲线,消除了铸造缺陷,并提出了一种自补缩无加压低压铸造工艺,提升气缸盖铸造良品率,为气缸盖铸造工艺提供新方向。

When a certain type of aluminum alloy cylinder head was produced by traditional low-pressure casting process,frequent blowhole and shrinkage defects occur near the injector hole,leading to leakage of the casting product.The casting process was simulated and optimized by using the simulation software of magma casting process.Combined with 3D printing sand core technology,the casting defects were eliminated by optimizing the casting process design and adjusting the low pressure casting curve.By putting forward a kind of self feeding without the pressure boost of low pressure casting process,the yield of the cylinder head casting was increased,which provided a new direction for the cylinder head casting process.