航空发动机燃气涡轮叶片机械加工时，需根据叶片型面非规则的几何形状设计专用工装，存在加工基准转换频繁、叶片加工质量和生产效率低等问题。 采用低熔点合金浇注的方法再造加工基准，并对其金属型铸造工艺进行了实验研究。 结果表明，使用金属型铸造工艺生产燃气涡轮叶片加工基准，满足工件装夹的硬度要求，通过机械破碎的方式可实现工件与基准块之间的快速分离，该工艺缩短了产品制造周期，提高了生产效率。

Special tools were designed according to the irregular geometry of the blade profile when aero-engine gas turbine blades were machined, and problems such as frequent conversion of machining datum, low machining quality and low production efficiency existed. In this paper, a low melting point alloy casting method was used to reconstruct the machining benchmark, and the metal mold casting process was studied experimentally. The results show that the machining benchmark of the gas turbine blade produced by the metal mold casting process can meet the hardness requirements of workpiece clamping. The rapid separation between the workpiece and benchmark block could be realized by mechanical crushing, hence the process could shorten the manufacturing cycle and improve the production efficiency.