Micro Electrical Discharge Machining of Micro-Hole

Advancements in micro-fabrication are characterized by a progressive miniaturization leading towards higher integration. The fabrication of particular size micro hole in difficile to machine engineering materials is one of the most challenging tasks in manufacturing industry. Since micro holes are prepared in the end product therefore the rejection of product due to poor hole quality is not acceptable in modern manufacturing industries. Micro electrical discharge machining has become one of the most promising methods for creating micro features or micro components of any electrical conducting engineering materials in spite of its hardness. The material extraction mechanism in micro electrical discharge machining is due to plasma creation, heat deportation, superheating of both the electrodes and expulsion of material is in the form of debris particles by dielectric fluid during pulse-off time. The micro feature such as micro hole created by micro electrical discharge machining process is useful in industries ranging from automobile to biomedical. In order to improve process efficiency researchers across the globe worked on micro electrical discharge machining Setup development, micro electrical discharge machining of different materials and shapes in general and hole making in particular, and also analyzes different factor that affect process performance. Present paper summarizes research work carried out related to experimentation, modeling and optimization of sinking and drilling micro electrical discharge machining of different materials.