大直径薄壁球形阀芯加工工艺

球形阀芯是液氧／煤油发动机煤油隔离阀的核心部件，它具有大直径、薄壁、形状不规则等特点，给加工带来极大难度，被列入液氧／煤油发动机研制中的关键工艺技术。通过反复试验摸索，在充分了解锻铝材质球形零件加工特点的基础上，总结出一套粗加工、半精加工、精加工的加工工艺流程。通过优化各种参数、安排进行多次冷、热处理并采用恒切削速度进行球面精加工，生产出了性能可靠、质量上乘的产品。

Machining technology of thin-walled spherical valve core with large diameter

As a key part in the kerosene isolation valve of LOX/Kerosene engine, the spherical valve core is featured by large diameter, thin wall and irregular shape, resulting in the difficulty of ma- chining. Thus machining of the spherical valve core is regarded as the key technology in the develop- ment of LOX/Kerosene engine. Based on the repeated tests and thorough study on machining charac- teristics of wrought aluminium spherical part, a rough-semifinish-finish machining process of the spherical valve core was proposed with the optimization of machining parameters. Several cold and heat treatments and spherical finish machining with constant cutting speed make the quality and per- formance of the final product reliable.