大扭曲叶片整体涡轮盘电解加工关键技术  

Key technology of electrochemical machining integral impeller with big-twisted blades

作　　者：朱永伟[1] 徐家文[1] 赵建社[1] 

机构地区：[1]南京航空航天大学机电学院

出　　处：《哈尔滨工业大学学报》2008年第5期783-787,共5页Journal of Harbin Institute of Technology

基　　金：“十五”国防科技预研资助项目(41318.3.2.4);中国博士后科学基金资助项目(2003034382)

摘　　要：整体涡轮盘大扭曲叶片的机械加工一直是制造业中的难点,本文提出用薄片底板阴极的展成电解方法实现其叶片加工.分析大扭曲叶片展成电解加工成形过程特点,对叶片型面离散点坐标进行数据处理,进行组合式数控系统多轴联动计算机辅助数控编程;用程序补偿法消除叶片根部三角区过切,用具有补液流场的薄片与座体的组合阴极进行展成加工,消除叶背处电解二次腐蚀过切;进行整体涡轮大扭曲叶片展成电解加工试验,可稳定达到叶片加工工序要求.The function, structure features and diificuhies in machining process about the integral impeller with big-twisted blades are introduced. Electrochemical contour evolution machining using a combined slice cathode is promoted for producing the big-twisted blades. The shaping law is analyzed and dispersed data of the blades are processed. The multi-axes cooperative movement numerical programs are programmed. The blade back extra corrosion and the short circuit in gas exit are eliminated by using the combined cathode of slice and back, which has an adding electrolyte flowing field. The numerical programs are made a compensation to avoid the extra machining in the triangle field of the blade root. The tests of the electrochemical contour evolution machi- ning integral impeller with big-twisted blades are carried out and the blades up to the standard are produced.

关 键 词：大扭曲叶片 展成电解加工 补液流场 组合式阴极 电解过切 

分 类 号：TG662[金属学及工艺—金属切削加工及机床]