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在微细电火花加工(EDM)中电极损耗是不可避免的,而针对电极损耗的研究大都是在油工作液中,很少针对气中放电时的电极损耗进行研究.气中电火花加工普遍采用管状电极,所以为了获得尺寸更小的工件,通过反拷块可磨削出微米级的实心电极,并采用外部充气的方式,可实现微米级三维结构的气中电火花加工.实验考虑了影响气中放电电极损耗的各种因素.通过观察微细电火花三维铣削放电现象与结果,可得到气中放电的规律.由于电火花加工中电极损耗是不可避免的,所以在三维铣削加工中对电极进行在线检测并补偿,工件成形精度大大提高.对刀具路径进行合理规划,可以缩短加工时间.与油中电火花铣削相比,气中电火花加工时电极损耗更低,加工表面质量更好.
Electrode loss is inevitable in EDM, and most of the researches on electrode loss are in oil working fluid, and few studies on the electrode loss in gas discharge have been carried out. Tubular electrode, so in order to obtain the smaller size of the workpiece, anti-copy blocks can be grinded out of solid micron-sized electrodes, and the use of external inflatable way, micro-level three-dimensional structure of the gas can be EDM. Gas discharge electrode loss of various factors. By observing the three-dimensional micro-EDM discharge phenomenon and the results obtained in the gas discharge law. EDM electrode wear is inevitable, so in the three-dimensional milling of the electrode The on-line inspection and compensation can greatly improve the forming accuracy of the workpiece, and the reasonable planning of the tool path can shorten the processing time.Compared with the EDM in oil, the electrode loss in the gas is lower and the machined surface quality is better.