Effect of Wire Diameter, Feeding Rate, Pulse (on/off) Time on Surface Roughness and Metal Removal Rate for Cr-Mo Steel (SCM425H) During Wire Electrical Discharge Machine (WEDM) Cutting Operation

Shather, Saad K.; Hammood, Sami A.; Hussain, Noor Al-Huda A.; Hasson, Noor H.

doi:10.30684/etj.v38i6A.524

	Effect of Wire Diameter, Feeding Rate, Pulse (on/off) Time on Surface Roughness and Metal Removal Rate for Cr-Mo Steel (SCM425H) During Wire Electrical Discharge Machine (WEDM) Cutting Operation
Engineering and Technology Journal
Article 6, Volume 38, 6A, 2020, Pages 854-860 PDF (905.28 K)
Document Type: Research Paper
DOI: 10.30684/etj.v38i6A.524
Authors
Saad K. Shather^* ; Sami A. Hammood^* ; Noor Al-Huda A. Hussain; Noor H. Hasson
Production Engineering and Metallurgy Department, University of Technology-Iraq.
Abstract
Increase the demand to produce complex shapes with high quality and dimensional accuracy such as production aerospace, cars, die sinking has been leading to increase the demand to use the non- traditional cutting operations such as wire electro-discharge machine (WEDM) rather than using the traditional operations. An idea to understand the effect of wire diameter, wire feed, pulsing (on/off) time on surface roughness, and metal removal rate of Cr-Mo steel during wire electrical discharge machining was investigated. Two Steel alloy samples with dimensions of (60 x50 x 20)mm were cut into four rectangular spaces with (5x10x20)mm at one side of each sample using wire cut (EDM) machine with a wire diameter of 0.25 mm and feeding rate 2 m/min for sample 1 and a 0.3 mm diameter and 3 m/min feeding rate for sample 2. Pulse (on, off) time was (110, 50), (112, 52), (115, 55), (116, 57) corresponds to space 1, space 2, space 3, and space 4 in both steel block. Surface roughness and metal removal rate measurements were estimated. The results showed that wire diameter, feeding rate, and pulse (on, off) time is proportional with metal removal rate, while reversed with surface roughness. The wire diameter of 0.3 mm and a feeding rate of 3m/min enhanced better surface quality and productivity. Pulse (on, off) time is the most effective parameter. Best duration time was recorded at the values (116, 57)
Keywords
Wire Electrical Discharge Machining (EDM); wire diameter; feeding rate; pulse on/off time; Surface Roughness; Metal removal rate; chromium molybdenum steel

References
[1] Y.S. Lia, J.T. Huang and Y.H. Chen, “A study to achieve affine surface finish in wire EDM,” Journal of Materials Processing Technology, Vol. 149, pp. 165-171, 2004. [2] S. K. Shather, D. A. Noori. “Influence of Intervening variables on surface roughness and metal removal rate during WEDM process,” Eng. &Tech. Journal, Vol. 32, Part A, No. 5, pp. 1141-1148, 2014 . [3] Shivkanthtilekar, S. Das, P. K. Patowari, “Process parameter optimization of wire EDM on aluminum and mild steel by using taguchi method,” International conference on AMME, 2014 [4] D. H. Gajjar et al. “Optimization of MRR, SR, kerf width in WEDM using molybdenum wire,” IJER,Vol. 4, \| Issue 2, 2015. [5] S. Kumar and P. Kumar, “Investigation of material removal rate for wire-cut EDM of EN-31 alloy steel using taguchi technique,” International Journal of Scientific & Engineering Research, Vol. 7, Issue 12, pp. 155-161, 2016. [6] S. K. Shather, A. F. Ibrahim, D. A. Noori, “Experimental investigation to predict metal removal rate and surface roughness in wire cut process,” Diyala Journal of Engineering Science, Vol. 09, No. 03, pp. 49-58, 2016. [7] A. Goyal, A. Pandey, P. Sharma, “Investigation of surface roughness for inconel 625 using wire electric discharge machining,” IOP Conf. Series: Materials Science and Engineering, 377, pp. 1-7, 2018. [8] K. Ishfaq, N. Ahmad, M. Jawad, M. A. Ali and A. M. Al-Ahmari, “Evaluating material’s interaction in wire electrical discharge machining of stainless steel (304) for simultaneous optimization of conflicting responses,” Materials, Vol. 12, 2019.
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