Performance of Electroplated Copper Coating on Graphite Electrode in EDM Process

Main Article Content

Nattawut Chindaladdha
Don Kaewdook


Electrical Discharge Machining (EDM) is a nonconventional manufacturing process whereby a desired shape is obtained by using electrical discharges. Material is removed from the workpiece by current discharges between tool-electrode and workpiece, separated by a dielectric liquid. Copper electroplating is the process to produce a layer of copper on the surface of the substrate in this research was used graphite which is the tool-electrode. The study aims to investigate the performance of EDM product which used graphite coated with the copper layer. The experiment designed by using Taguchi-grey relational approach based multi-response optimization to find the optimal electroplating parameters. The considered electroplating parameters including 3 parameters 2 levels, current density 3.7 A/dm2 and 5.4 A/dm2, electrolyte concentration 0.1 mol and 1.0 mol, plating time 3 hours and 5 hours. The electrode's machining performance of the surface roughness (SR) of workpiece, tool wear rate (TWR) and material removal rate (MRR) will be investigated and compared with the conventional copper electrode.


Download data is not yet available.

Article Details

Research Article


D. Kaewdook. et al. (2020). EDM machine operation [Online]. Available:

P. Kumar, A. Tiwari, A. Kumari, and A. Majumder, “Compatibility of copper graphite as an electrode in sinking EDM accordance of electro thermal and mechanical properties,” International Journal of Engineering Research & Technology (IJERT), vol. 4, no. 4, pp. 1219-1222, Apr. 2015.

A. Ali Khan, M. Yeakub Ali, and M. Haque, “A study of electrode shape configuration on the performance of die sinking EDM,” International Journal of Mechanical and Materials Engineering, vol. 4, no. 1, pp. 19-23, Jun. 2009.

M. Darsin, Y. Hermawan, and A. Rachmat, “Variation of surface roughness on electrical discharge machining die sinking caused of different electrode material, current, and on Time,” in 12th International Conf. on Quality in Research, Bali, Indonesia, Jul. 2011, pp. 956-961.

M. Hourmand, S. Farahany, A. A. D. Sarhan, and M. Y. Nordin, “Investigating the electrical discharge machining (EDM) parameter effects on Al-Mg2Si metal matrix composite (MMC) for high material removal rate (MRR) and less EWR–RSM approach,” International Journal of Advanced Manufacturing Technology, vol. 77, no. 5, pp. 831-838, Mar. 2015.

P. M. Lonardo and A. A. Bruzzone, “Effect of Flushing and Electrode Material on Die Sinking EDM,” CIRP Annals, vol. 48, no. 1, pp. 123-126, Jan. 1999.

V. V. Reddya, P. V. Krishna, M. Jawahar, and B. S. Kumar, “Optimization of process parameters during EDM of SS304 using taguchi - grey relational analysis,” Materials Today, vol. 5, no. 13, pp. 27065–27071, Dec. 2018.

P. A. Sylajakumari, R. Ramakrishnasamy, and G. Palaniappan, “Taguchi grey relational analysis for multi-response optimization of wear in co-continuous composite,” Materials, vol. 11, no. 9, pp. 1-17, Sep. 2018.

M. Kumar and H. Singh, “Multi response optimization in wire electrical discharge machining of Inconel X750 using Taguchi’s technique and grey relational analysis,” Cogent Engineering, vol. 3, no. 1, pp. 1-14, Nov. 2016.

T. Muthuramalingam and B. Mohan, “Taguchi-grey relational based multi response optimization of electrical process parameters in electrical discharge machining,” Indian Journal of Engineering and Materials Sciences, vol. 20, no. 6, pp. 471-475, Dec. 2013.

B. Suksawadi. (2019). Taguchi Method for Optimization Problems [PowerPoint slides]. Available:

N. N. Le et al., “Optimization of copper electroplating process applied for microfabrication on flexible polyethylene terephthalate substrate,” Advances in Natural Sciences: Nanoscience and Nanotechnology, vol. 6, no. 3, pp. 1-6, May 2015