针对整体叶轮扭曲叶片型面的加工提出一种新方法——数控展成电解加工 ,介绍了这种加工方法的机床及多轴联动方法 ,给出曲面处理及数控编程方法。通过对展成加工过程的分析和简化 ,进行了成型规律研究 ,得出加工中存在的理论误差表达式 ,提出改进方案消除了部分加工误差 ,并通过试验验证。用这种加工方式已加工出符合要求的整体叶轮 ,并已在航空发动机中装机使用 Aiming at the machining of the twisted blade profile of the whole impeller, a new method is proposed, that is, the CNC is extended to the electrolytic machining. The machine tool and the multi-axis linkage method of the machining method are introduced. The surface treatment and NC programming are given. Through the analysis and simplification of the exhibition process, the research on the molding rule was carried out, the theoretical error expression existed in the process was obtained, the improvement program was adopted to eliminate some machining errors and the test was verified. With this processing has been processed to meet the requirements of the overall impeller, and has been installed in the aero-engine use