An organic combination of numerically controlled electrochemical machining(NC-ECM) and numerically controlled electrical discharge machining(NC-EDM) is useful to solve the problem of how to machine closed integral impellers.NC-ECM is the key step to increase the process efficiency,and the cathode design is the key technique of NC-ECM.Taking the numerically controlled electrochemical machining of a 3D-flow composed impeller as an example,a method of cathode design was put forward herein.Machining experiments were carried out and the machining allowance of the integral impeller can maintain 0.5～0.7mm,meeting the precision requirements.

数控电解/数控电火花组合电加工技术是解决闭式整体叶轮加工难题的有效工艺方法,其中数控电解是提高综合加工效率的关键,而阴极设计则是电解加工的核心技术。以某型三元流闭式整体叶轮上复杂气流通道的数控电解加工为例,介绍了一种阴极设计方法。通过工艺试验,加工出的试件能均匀留出0.5～0.7mm加工余量,符合组合电加工的工序要求。

 

阴极设计, 闭式整体叶轮, 电解加工, 数控