Aiming at the air porosity and gas-leakage defect in aluminum alloy camshaft bracket of engine in the trial-product state

origination of defects was analyzed by the Magma software to simulate filling and solidification process of liquid aluminum alloy.The results reveal that excessive thick wall-thickness can increase the solidification time

so the large hot spot can be formed in the castings

resulting in the shrinkage porosity.Through optimizing process

the defects in the die castings can be eliminated

and quality of the castings is improved with the decrease of developing period.