Experimental study of MWEDM technology

This work deals with an experimental investigation of the machining characteristics of Micro Wire Electrical Discharge Machining (MWEDM). The MWEDM process consists of only one cutting operation varying with machining conditions. Experimental results show that the peak current and pulse duration have an obvious influence on surface roughness and machining time, and they also have an optimum value for the highest culling speed. The servo reference voltage influences the surface roughness and machining time as well. In particular, the surface characteristics of work-pieces and a micro wire electrode were analyzed in detail too. Utilizing a micro wire electrode with diameter 30 μm, MWEDM can machine a micro slot 38 μm wide, which proves that the discharge gap can be controlled not more than 4 μm. It can also machine micro gears respectively with a module 40 μm, thickness 1 mm, and a module 100 μm, thickness 3.5 mm. All kinds of micro shaped holes and complex micro parts can be easily machined as well.