Miniaturization of WEDM Using Electrostatic Induction Feeding Method

Abstract

In this research, the electrostatic induction feeding method was applied to the WEDM. Since the influence of the stray capacitance in the circuit can be eliminated, the discharge energy can be minimized to accomplish micro WEDM. This method also allows non-contact feeding of electric current to the wire electrode. Thus high accurate micro WEDM can be realized because there is no wear of brush and the wire vibration does not depend on the cutting direction. In this research, micromachining properties of the electrostatic induction feeding method were investigated using air and oil working dielectrics, and a micro beam of 100μm in length and 3.7μm in width was obtained successfully.