带冠整体叶轮电火花加工电极结构与运动轨迹设计方法  

Electrode Structure and Motion Path Design Method for EDM with Cowled Integral Impeller

作　　者：田喜明[1] 张云鹏[2] 陈阳 TIAN Ximing;ZHANG Yunpeng;CHEN Yang(Naval Equipment Department of PLA,Xi′an 710021,China;School of Mechanical Engineering,Northwestern Polytechnical University,Xi′an 710072,China;AECC Aviation Power Co.,Ltd.,Xi′an 710021,China)

机构地区：[1]海军装备部,陕西西安710021 [2]西北工业大学机电学院,陕西西安710072 [3]中国航发动力股份有限公司,陕西西安710021

出　　处：《电加工与模具》2019年第1期12-15,共4页Electromachining & Mould

摘　　要：利用电火花成形加工带冠整体叶轮时,由于叶轮通道狭窄、扭曲,电极及其运动轨迹复杂,导致无法使用单块电极完成加工。对此,提出了电极结构与运动轨迹同步设计的方法。首先设置电极的初始运动轨迹,若电极运动过程中出现无法调整的干涉问题,则对电极作拆分处理,直至完成所有电极运动轨迹的设计。在搜索电极运动轨迹时,将电极与工件干涉问题设置为约束条件,建立轨迹搜索最优化模型。用UG软件完成电极结构的拆分设计,并基于电极运动仿真模块生成每块电极的无干涉运动轨迹。用Ansys软件对电极进行重力场有限元分析,验证其刚度。使用所设计的工具电极进行试制加工实验,验证了电极结构与运动轨迹设计方法的正确性,可作为带冠整体叶轮电火花加工的一种通用解决方案。In the process of electro-discharge machining (EDM) with cowled integral impeller,because the impeller passage is narrow and twisted,the electrode and its motion path are so complex that the impeller cannot be processed with a single electrode. To solve this problem,synchronous design method of electrode structure and motion path is proposed. The initial electrode motion path is set up,if there is any interference that cannot be adjusted during the movement,the electrode will be split until all the electrode passing successfully. An optimization model is established for trajectory search. Using UG software to design splitting electrode structure and generated motion path without interference based on motion simulation option. Using Ansys software for finite element analysis of gravity field,because the problem of insufficient rigidity of electrode may exist. The designed electrode is used for trial manufacturing and the result shows that electrode structure and its motion path design method are correct. It can be used as a general solution for EDM with cowled integral impeller.

关 键 词：带冠整体叶轮 电火花加工 电极 运动轨迹 

分 类 号：TG661[金属学及工艺—金属切削加工及机床]