Process capabilities of Micro-EDM and its applications
- 1.6k Downloads
The micro-electrical discharge machining (micro-EDM) process has proved to be an appropriate nonconventional machining method for manufacturing accurate and complex three-dimensional structural micro-features which are difficult to be produced by conventional processes. However, the miniaturisation of the EDM process requests special requirements on the machining equipment. Pulse generators which can produce small input energy pulses and high precision systems are the two major requirements. In this paper, newly developed technologies regarding these aspects are explored with the aid of a commercial micro-EDM machine. By examining the pulses, innovative strategies implemented in the pulse generator are studied. Pulse measurements reveal the correlation between the discharge pulses and the machine parameters in order to provide an overview of process capability. Conclusions are applied on machining of a ceramic composite Si3N4-TiN and optimised machining settings for different machining conditions are achieved. Accordingly, applications of two- and three-dimensional micro-structures on different types of materials such as a stainless steel micro-compressor and a ceramic miniature gas turbine are demonstrated. By inspecting the machining geometry and surface integrity, process characteristics of micro-EDM are discussed.
KeywordsMicro-EDM Ceramic composite 3D EDM milling
Unable to display preview. Download preview PDF.
- 4.Song X, Meeusen W, Reynaerts D, Van Brussel H (2000) Experimental study of micro-EDM machining performances on silicon wafer. Proceedings of SPIE’s 2000 Symposium on Micromachining and Microfabrication, Santa Clara, USA, pp 331-339Google Scholar
- 9.Reynaerts D, Van Brussel H, Meeusen W, Driesen W, Dierickx V (2001) Micro-Electro Discharge Machining: review and application. Proactive Strategies of Efficient Production Technology, pp 107-122Google Scholar
- 12.Masuzawa T (2001) Micro-EDM. Proceedings of 13th International Symposium on Electromachining (ISEM XIII). Bilbao, Spain, pp 3–19Google Scholar
- 17.Peirs J et al (2007) Micropower generation with microgasturbines: a challenge. Proc IMechE, Part C. J Mech Eng Sci 221:489–500Google Scholar