Taguchi-Based Optimization of Surface Roughness and Dimensional Accuracy in Wire EDM Process with S7 Heat Treated Steel
This research focuses on the use of the Taguchi method to reduce the surface roughness and improve dimensional accuracy of parts machined by Wire Electrical Discharge Machining (EDM) with S7 heat treated steel material. Due to its high impact toughness, the material is a candidate for a wide variety of tooling applications which require high precision in dimension and desired surface roughness. This paper demonstrates that Taguchi Parameter Design methodology is able to optimize both dimensioning and surface roughness successfully by investigating seven wire-EDM controllable parameters: pulse on time (ON), pulse off time (OFF), servo voltage (SV), voltage (V), servo feed (SF), wire tension (WT), and wire speed (WS). The temperature of the water in the Wire EDM process is investigated as the noise factor in this research. Experimental design and analysis based on L18 Taguchi orthogonal arrays are conducted. This paper demonstrates that the Taguchi-based system enables the wire EDM process to produce (1) high precision parts with an average of 0.6601 inches dimension, while the desired dimension is 0.6600 inches; and (2) surface roughness of 1.7322 microns which is significantly improved from 2.8160 microns.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1131655Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 539
 Payal, H. S., & Sethi, B. L. “Non-conventional machining processes as viable alternatives for production with specific reference to electrical discharge machining.” Journal of Scientific & Industrial Research, 62(1), pp. 678-682. 2003.
 Gupta, K., & Jain, N. “On surface integrity of miniature spur gears manufactured by wire electrical discharge machining.” International Journal of Advanced Manufacturing Technology, 72(9-12), pp. 1735-1745. 2014.
 Saleem, M. Q. & Awais, M. “Wire Electrical Discharge Machining: An Investigation for Better Machining Performance in low Range Tapering Mode.” Technical Journal, University of Engineering and Technology (UET) Taxila, Pakistan, 20. 2015.
 Rao, R. V., & Pawar, P. J. “Process parameters modeling and optimization of wire electric discharge machining.” Advances in Production Engineering & Management, 5(3), pp. 139-150. 2010.
 Plaza, S., Ortega, N., Sanchez, J. A., Pombo, I., & Mendikute, A. “Original models for the prediction of angular error in wire-EDM taper-cutting.” International Journal of Advanced Manufacturing Technology, 44(5/6), pp. 529-538.2010.
 Dongre, G., Singh, R., & Joshi, S. S. “Response surface analysis of slicing of silicon ingots with focus on photovoltaic application.” Machining Science & Technology, 16(4), pp. 624-652. 2012.
 Fonda, P., Katahira, K., Kobayashi, Y., & Yamazaki, K. “WEDM condition parameter optimization for PCD microtool geometry fabrication process and quality improvement.” International Journal of Advanced Manufacturing Technology, 63(9-12), pp. 1011-1019. 2012.
 Kuruvila, N., & V., R. H. “Parametric influence and optimization of wire edm of hot die steel.” Machining Science & Technology, 15(1), pp. 47-75. 2011.
 Ozan, S., Guleryuz, L. F., Kasman, Ş., & İpek, R. “An investigation of WEDM process parameters on the surface roughness of Al/B4Cp metal matrix composites.” AIP Conference Proceedings, 1476(1), pp. 317-320. 2012.
 Boopathi, S., & Sivakumar, K. “Experimental investigation and parameter optimization of near-dry wire-cut electrical discharge machining using multi-objective evolutionary algorithm.” International Journal of Advanced Manufacturing Technology, 67(9-12), pp. 2639-2655. 2013.
 Kumar, V. M., Babu, A. S., Venkatasamy, R., & Raajenthiren, M. “Multi Response Optimization of Machining Parameters of Wire-EDM using Grey Relational Analysis in the Taguchi Method.” International Journal of Applied Engineering Research, 5(13), pp. 2325-2338. 2010.
 Ramananantoandro, T., Larricq, P., & Eterradossi, O. “Relationships between 3D roughness parameters and visuotactile perception of surfaces of maritime pinewood and MDF.” Holzforschung: International Journal of The Biology, Chemistry, Physics, & Technology of Wood, 68(1), pp. 93-101. 2014.