铝合金涡壳金属型重力铸造工艺设计及优化

Design and Optimization of Metal Mold Gravity Casting Process for the Aluminum Alloy Vortex Shell

涡壳铸件内部质量要求严格,生产难度大,经过对其工艺结构的认真分析,重新设计了铸件的工艺方案及金属型模具,并在此基础上结合现场实际生产进行了铸件工艺试验验证。铸件试制过程中,采取了控制铸型涂层厚度、加冷铁等工艺措施,使铸件形成顺序凝固。结果表明,通过改进铸造工艺方法,优化模具结构,生产出了合格的铝涡壳铸件,解决了实际生产中铝涡壳的冷隔、缩松、气孔等缺陷。

In order to meet the needs of high internal quality of the aluminum alloy vortex shell, the structure of casting was analyzed, the casting process and metal mold were redesigned and then were put into practice. During the process of verification test, some measures to form the sequential solidification have been implemented, such as controlling the coating thickness of the mold, placing chill in appropriate place. The results show that by improving casting process and optimizing the die, the cold shut, shrinkage, porosity and other casting defects of the vortex shell can be alleviated, and finally the qualified castings can be produced.