报告者谢圣尉报告者谢圣尉outline1.Introduction2.Experimental apparatus3.Goove machining experiments4.Three-dimensional machining5.Conclusions1. IntroductionDry electrical discharge machining (dry EDM) has characteristics of high work removal rate and low tool electrode wear ratio. Hence dry EDM is suitable for three-dimensional milling of difficult-to-cut materials, such as cemented carbide. We compared machining characteristics between dry EDM milling, oil EDM milling and oil die sinking EDM and found that dry EDM milling is most advantageous to three-dimensional milling of cemented carbide considering the total machining time and cost.2. Experimental apparatusTool electrode spindle2. Experimental apparatusCuW pipe electrode3. Goove machining experiments3.1. Experimental methodTool path3. Goove machining experiments3.1. Experimental method3. Goove machining experiments3.1. Experimental method3. Goove machining experiments3.2. Experimental results4. Three-dimensional machiningVarious types of EDM methods4.1. Experimental method4. Three-dimensional machining4.1. Experimental method4. Three-dimensional machining4.2. Experimental results4. Three-dimensional machining4.2. Experimental resultsDry EDM milling5. Conclusions1.Dry EDM milling shows higher machining speed and lower electrode wear ratio than oil EDM milling.2.Dry EDM milling can be used for the three-dimensional machining of cemented carbide.3. In comparing dry EDM with oil die sinking EDM for machining the same shape using cemented carbide, oil die sinking EDM shows shorter machining time. But because oil die sinking requires time for producing.Thank you for attention15