中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 23 No. 3 March 2013 |
（1. Department of Mechanical and Electrical Engineering,
Fujian Polytechnic of Information Technology, Fuzhou 350003, China;
2. Department of Mechatronic and Electrical Engineering,
Tahua University of Science and Technology, Hsinchu 30740;
3. Department of Mechanical Engineering, Lunghwa University of Science and Technology, Taoyuan 33306;
4. Department of Engineering Science, National Cheng Kung University, Tainan 70101）
Abstract:The optimization of micro milling electrical discharge machining (EDM) process parameters of Inconel 718 alloy to achieve multiple performance characteristics such as low electrode wear, high material removal rate and low working gap was investigated by the Grey-Taguchi method. The influences of peak current, pulse on-time, pulse off-time and spark gap on electrode wear (EW), material removal rate (MRR) and working gap (WG) in the micro milling electrical discharge machining of Inconel 718 were analyzed. The experimental results show that the electrode wear decreases from 5.6×10-9 to 5.2×10-9 mm3/min, the material removal rate increases from 0.47×10-8 to 1.68×10-8 mm3/min, and the working gap decreases from 1.27 to 1.19 μm under optimal micro milling electrical discharge machining process parameters. Hence, it is clearly shown that multiple performance characteristics can be improved by using the Grey-Taguchi method.
Key words: Inconel 718 alloy; micro milling electrical discharge machining; electrode wear; material removal rate; working gap; Grey-Taguchi method
