三元流闭式叶轮组合电加工技术研究Ⅰ——总体方案设计及关键技术  

Research on Combined Electrical Machining of 3D-flow Closed ImpellerⅠ——Overall Scheme Design and Key Technology

作　　者：刘辰[1] 徐家文[1] 赵建社[1] 吴锐[1] 

机构地区：[1]南京航空航天大学江苏省精密与微细制造技术重点实验室,江苏南京210016

出　　处：《航空学报》2010年第3期650-654,共5页Acta Aeronautica et Astronautica Sinica

基　　金："十一五"国防技术基础项目

摘　　要：针对难切削材料三元流闭式叶轮上复杂弯扭型腔的加工难题,提出数控电解(NC-ECM)/数控电火花(NC-EDM)组合加工数字化制造技术方案。本文重点论述了其总体方案设计及关键技术,包括总体工艺流程设计,数控电解预加工中阴极及运动轨迹设计,数控电火花精加工中电极及加工轨迹设计,工装夹具设计以及加工参数的选择与优化等问题。成功试制了合格的某型三元流闭式叶轮,试验结果表明,组合电加工技术能够满足三元流闭式叶轮的实际生产要求。In order to solve the difficult problem of how to machine a complex curved cavity of a difficult-to-cut material in a 3D-flow closed impeller,a new process of combined electrical machining and digitized manufacturing technology is put forward,which is a combination of numerically controlled electrochemical machining（NC-ECM）and numerically controlled electrical discharge machining（NC-EDM）.Its overall scheme design and key technology are discussed in this article,including the overall process design,the design of cathodes and their tracks in pre-processing by NC-ECM,the design of electrodes and their tracks in precision work by NC-EDM,fixtures design,and the technological parameter selection and optimization.A 3D-flow closed impeller is machined successfully by this method,and the test results show that the combined electrical machining is useful in the production of 3D-flow closed impellers.

关 键 词：三元流 闭式叶轮 组合电加工 数控系统 电解加工 电火花加工 

分 类 号：V261[航空宇航科学与技术—航空宇航制造工程]