OPTIMIZATION OF MICRO ELECTRICAL DISCHARGE MACHINING PARAMETERS OF Ti-6Al-4V

Electrical Discharge Machining (µEDM) appears to be very promising as a future micromachining technique since in many areas of applications it offers several advantages. Brass (500µm) electrode is used as tool and Ti-6Al-4V is used as work piece. Different parameters, such as the Current, Pulse on time and Pulse off time are used to get the aperture’s size. Dielectric is De-ionized water. In µEDM setup, the dielectric flow circulating system is essential and must be considered carefully, otherwise the dirty dielectric will flow into the machining chamber again and cause second discharging of the work piece and infect the aperture’s sizes. Because the Brass electrode is too small, a use current passing will destroy the Brass electrode. Analysis indicates the most effective zone of predominant process parameters such as Current, Pulse on time and Pulse off time which give the appreciable amount of Material Removal Rate (MRR) with less Over Cut (OC). The experimental results and analysis on µEDM will open up more application possibilities for µEDM. This result shows the Current play an important part in the MEMS.