Influence of discharge energy on machining characteristics in EDM
- 1.3k Downloads
The machining characteristics of electrical discharge machining (EDM) directly depend on the discharge energy which is transformed into thermal energy in the discharge zone. The generated heat leads to high temperature, resulting in local melting and evaporation of workpiece material. However, the high temperature also impacts various physical and chemical properties of the tool and workpiece. This is why extensive knowledge of development and transformation of electrical energy into heat is of key importance in EDM. Based on the previous investigations, analytical dependence was established between the discharge energy parameters and the heat source characteristics in this paper. In addition, the thermal properties of the discharged energy were experimentally investigated and their influence on material removal rate, gap distance, surface roughness and recast layer was established. The experiments were conducted using copper electrode while varying discharge current and pulse duration. Analysis and experimental research conducted in this paper allow efficient selection of relevant parameters of discharge energy for the selection of most favorable EDM machining conditions.
KeywordsDischarge energy Electrical discharge machining Gap distance Material removal rate Surface integrity
Unable to display preview. Download preview PDF.
- W. Konig, Fertigungsverfahren, Band 3 Abtragen, VDI-Verlag GmbH, Dusseldorf, Germany (1979).Google Scholar
- R. Snoeys and F. S. Van Dijck, Investigation of electro discharge machining operations by means of thermo-mathematical model, CIRP Ann-Manuf Techn, 20(1) (1971) 35–37.Google Scholar
- N. Tosun, The effect of the cutting parameters on performance of WEDM, J Mech Sci Technol, 17(6) (2003) 816–824.Google Scholar