1. Effect of micro-powder suspension and ultrasonic vibration of dielectric fluid in micro-EDM processes—Taguchi approach Gunawan Setia Prihandana a,b,!, Muslim Mahardika b, M. Hamdi a, Y.S. Wong c, Kimiyuki Mitsui d a Department of Engineering Design and Manufacture, University of Malaya, Lembah Pantai, Kuala Lumpur 50603, Malaysia b School of Integrated Design Engineering, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan c Department of Mechanical Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260, Singapore d Department of Mechanical Engineering, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan 簡報人 : 江柏翰 指導老師 : 戴子堯

2. outline 1. Introduction 2. Experimental setup 3. Results and discussion 4. Conclusions

3. Introduction This paper presents the effect of using micro-powder suspended in dielectric fluid and ultrasonic vibration in micro-EDM processes, investigates the frequency of the sparks during machining processes in pure dielectric fluid and powder suspended dielectric fluid, which had never been done by other studies in the same field, and uses the Taguchi approach to determine the optimum process parameters to increase the material removal rate without degrading its surface quality.

4. Experimental setup

8. Results and discussion

12. Conclusions 1.MoS2 加入加工液中，會分佈在電流的路徑中，可以游離 C 離子， 可將孔洞加工得較平坦， MoS2 具有高潤滑性，且可改善表面質 量。 2. 加工液以超音波振動可以增加材料的去除率，且可防止粉末沉 積底部讓粉末可以在電極和工件流動