微细电火花加工关键技术及工艺研究  

The Key Techniques and Process for Micro-electrical Discharge Machining

作　　者：张勇斌 吉方 刘广民 张连新 吴祉群 

机构地区：[1]机械制造工艺研究所,四川绵阳621900

出　　处：《组合机床与自动化加工技术》2011年第2期96-99,共4页Modular Machine Tool & Automatic Manufacturing Technique

摘　　要：文中基于新研发的一套微细电火花精密加工系统μEDM-50,介绍了研发过程中探索出的最小脉宽可以达纳秒级的微能脉冲电源以及一些针对微细电火花加工的特点形成的特殊工艺。微能脉冲电源具有主动消电离环节,可以减少脉间的残余电荷放电,提高加工表面质量;特殊工艺有利于提高系统的加工精度和效率,提高微细电极的安全性。最后,介绍了一些金属零件上典型的微小特征精密加工实验以及放电沉积实验。该系统加工特征的尺寸范围主要介于数十微米到数毫米内。In the paper,a kind of micro-electrical discharge machining system named μEDM-50 is described.The paper also presents micro-energy pulse power supply whose least width of pulse can reach nanosecond.Some special processes are introduced subsequently.There is an active discharging circuit in the pulse power supply,which can reduce the residual charge to improve the machining quality of surface.The special process is useful to increase the machining precision and efficiency.Furthermore,micro-tool electrode will be safer.The paper finally gives several typical experiments of machined miniature structures and electrical discharge deposition.The micro-electrical discharge machining system is mainly to manufacture structure whose size varies from dozens of micrometers to several millimeters.

关 键 词：微细电火花 微能脉冲电源 工具电极 

分 类 号：TH16[机械工程—机械制造及自动化] TG65[金属学及工艺—金属切削加工及机床]