Influences of Machining Parameters on Electrode Wear in Piezoelectric Self-Adaptive Micro-EDM

Abstract

To resolve such problems as higher electrode wear and low machining efficiency of micro-EDM, a new piezoelectric self-adaptive micro electrical discharge machining system (PSMEDM), based on inverse piezoelectric effect, was developed in this paper. In this new system, a piezoelectric actuator with high frequency response was applied as the micro feeding system to regulate the discharge gap. The machining mechanism and machining process were elaborated. The paper focus on the planning of PSMEDM process and the electrode wear problem. Special attention is paid on the influence of machining parameters such as open voltage, capacitance, resistance, spindle rotational speed and initial feed speed on machining efficiency by using signal to noise analysis method based on orthogonal experiment.