Research on Miniaturized Direct Drive Mechanism of EDM Electrode Using Linear Ultrasonic Motors

Abstract

This paper deals with an electrode direct drive device for Electrical Discharge Machining (EDM) utilizing a dual stator linear ultrasonic motor. The stepping feed and moving direction of the electrode are controlled by the ultrasonic motor. Through changing moving direction of the electrode quickly, the coaxial vibration of the electrode is generated and it enhances the evacuation of debris, thereby improves the machining speed. The dimension of the mechanism is 45 mm x 20 mm x 40 mm. Machining test verifies that the new device is suitable for small hole EDM drilling.