Performance of an Electrically Conductive CVD Diamond Electrode for EDM and FEM Analysis for a Very Low Wear

Abstract:

The performance of electrically conductive CVD (called EC-CVD) diamond thick film possessing a high thermal diffusivity has been examined as an electrode for fine electrical discharge machining (EDM). The results indicate a possibility of zero wear in EDM as compared to copper and copper-tungsten (Cu-W) electrodes. It is particularly significant at short pulse EDM conditions, where the EC-CVD diamond electrodes showed increased machining efficiency and a remarkably low wear. In EDM of tungsten carbide, a very low electrode wear ratio of 0.3% was realized with the EC-CVD diamond electrode. Zero wear EDM could be achieved even for sharp V-shapes with included angles of 15 and 30° with V-shaped EC-CVD diamond electrodes. Thermal FEM analysis to examine the relation between the thermal diffusivity and temperature distribution at short pulse duration indicated lowest temperature on EC-CVD diamond electrode surface.

• Periodical: Key Engineering Materials (Volumes 291-292)
• Pages: 543-548
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.291-292.543
• Online since: August 2005
• Authors: Kiyoshi Suzuki, Manabu Iwai, Anurag Sharma, Shinichi Ninomiya, Tetsutaro Uematsu, Sadao Sano
• Keywords: Electrically Conductive CVD Diamond Thick Film, Electro Discharge Machining (EDM), Low Wear Electrode

References

[1] K. Suzuki, A. Sharma, M. Iwai, T. Uematsu, K. Shoda, M. Kunieda: New Diamond and Frontier Carbon Technology, NDFCT 443 (2004), 14/1, pp.35-44.

[2] Element Six Ltd., Catalogue.

[3] A. Sharma, M. Iwai, K. Suzuki, T. Uematsu: Proc. of the Seventh International Symposium on Advances in Abrasive Technology, Vol. 1 (2004), pp.559-564.

[4] H. Xia, M. Kunieda, N. Nishiwaki, N. Lior: Advancement of Intelligent Production, (1994), pp.601-606.

[5] K. Kobayashi, et al.: Misubishi Denki Giho, Vol. 45, No. 10 (1971), p.33 (In Japanese).