电火花放电辅助化学加工间隙实验研究  

Experimental Study on Machining Gap of Spark Assisted Chemical Engraving Process

作　　者：刘光[1] 佟浩[2,3] 何苏钦 李勇[2,3] 李文卓 

机构地区：[1]烟台大学机电汽车工程学院,山东烟台264005 [2]清华大学机械工程系制造工程研究所,北京100084 [3]精密超精密制造装备及控制北京市重点实验室,北京100084

出　　处：《电加工与模具》2016年第1期20-23,共4页Electromachining & Mould

基　　金：北京高等学校青年英才计划资助项目(YETP0084);清华大学自主研究课题资助项目(20131089209)

摘　　要：面向航空发动机涡轮叶片热障涂层Zr O2陶瓷绝缘材料的加工,开展了不同加工间隙对加工稳定性及效率影响的实验研究。采用CCD图像在线观测微观接触的对准电极方法,实现了加工间隙测量给定精度可控±1μm,进而在特定工艺参数下实验研究了加工间隙的评价和优化,利用工件表面离子溅射镀膜和Matlab图像处理技术实现蚀除量分析,得出了稳定加工时材料最大蚀除量的最佳加工间隙范围,为电火花放电辅助化学加工工艺优化提供了依据。To improve the machining effect of ZrO2 insulating ceramic as thermal barrier coatings （TBCs） on aeroengine turbine blades,machining experiments were carried out to explore the influence of different machining gaps on machining stability and efficiency in spark assisted chemical engraving （SACE） process. An electrode-alignment method was presented for giving a machining gap by use of image observation based on a charge coupled device, and the tests showed that the gap accuracy can be controlled within ＋1 ~m. Further,several experiments were conducted to evaluate and optimize the machining gap with specific processing parameters. The methods of ion sputtering and Matlab image processing were adopted to analyze removal areas from workpieces, and the range of optimum mac gap was gained according to the maximum removal area come from stable sparks. This research can provide the basis for optimizing SACE process.

关 键 词：放电辅助化学加工 氧化锆陶瓷 加工间隙 

分 类 号：TG662[金属学及工艺—金属切削加工及机床]