OCTOBER 19-20, 2012 - YMCA University of Science & Technology

6.3 CONFIRMATION EXPERIMENTS
Proceedings of the National Conference on
Trends and Advances in Mechanical Engineering,
YMCA University of Science & Technology, Faridabad, Haryana, Oct 19-20, 2012
The data from the confirmation runs and their comparisons with the predicted values. From the analysis, we can
observe that the calculated error is small.
Quality
Charac
teristic
Optimal
setting
Of
process
paramet
Predicte
d
optimal
value
Confor
mation
Values
Surface
Roughness
A 1 B 1 C 2 D 1 . 2.3436 µm 2.21 µm
7. Conclusion
The Taguchi methodology is employed to find out the main parameters that affect the
different machining criteria, such as average cutting speed and surface roughness in the
present set of study. Four control factors have been studied simultaneously to establish the
trend of variation of a few important machining criteria with these control factors. A rough
cut has been considered as a machining operation. Target was to get the range of different
parameters which are taken under consideration. The Taguchi methodology is applied to
know which parameters are significant and to find out the optimum level of various process
parameters so as to obtain maximum cutting speed and minimum surface roughness. After
applying the Taguchi methodology optimum level of the parameters for the maximum cutting speed is
A 1 B 1 C 2 D 1 . The experimentation is summarized as under. The surface roughness (SR) is mostly influenced by
T on time and T off time.
• The combination of A1 B 1 C 2 D 1 (i.e. A=90A, B=115µs, C=50µs, D=5g) gives minimum surface roughness
of 2.3436 µm.
• The normal probability plot for SR is normally distributed because set of values of all values are mostly
close to mid value.
• The error between experimental and predicted values for SR is 5.67 %.
REFERENCES
[1] K.H. Ho, S.T. Newman, S. Rahimifard, R.D. Allen, State of the art in wire electrical discharge machining
(WEDM), International Journal of Machine Tools and Manufacture 44(2004), 1247-1259.
[2] A. Gatto, L. Luliano, Cutting mechanisms and surface features of WEDM metal matrix composite, Journal of
Material Processing Technology 65 (1997) 209-214.
[3] I. Puertas, C.J. Luis, A study on the machining parameters optimization of electrical discharge machining,
Journal of Materials Processing Technology, 143-144 (2003) 521-526.
[4] Y.S. Liao, J.T. Huang, Y.H. Chen, A study to achieve a fine surface finish in Wire-EDM, Journal of
Materials Processing Technology 149 (2004) 165-171.
[5] T.A. Spedding, Z.Q. Wang, Study on modeling of wire EDM process, Journal of Materials Processing
Technology 69 (1997) 8-28.
[6] Eduardo Weingartner, Konrad Wegener, Friedrich Kuster [2012] ”Wire electrical discharge machining
applied to high-speed rotating work pieces” Journal of Materials Processing Technology vol. 212, pp.1298–
1304
[7] Kamal Jangra, Sandeep Grover, Felix T. S. Chan & Aman Aggarwal [2011],” Digraph and matrix method to
evaluate the machinability of tungsten carbide composite with wire EDM” International Journal of
Advanced Manufacturing Technology vol.56, pp.959–974.
[8] D.V. Ghewade and S.R Niparkar [2011] ”Experimental Study of Electro Discharge Machining For Inconel
Material” Journal of Engineering Research and Studies Vol.2, pp.107-112.
[9] F. Klocke, D. Welling & J. Dieckmann [2011],”Comparison of grinding and Wire EDM concerning fatigue
strength and surface integrity of machined Ti6Al4V components” Procedia Engineering vol.19,pp. 184 – 18.
[10] S. Sarkar, M. Sekh, S. Mitra & B. Bhattacharyya [2011],” A novel method of determination of wire lag for
enhanced profile accuracy in WEDM” Precision Engineering vol.35,pp.339–347.
[11] N. G. Patil and P. K. Brahmankar [2010], “Some Studies into Wire Electro- Discharge Machining of
Alumina Particulate-Reinforced Aluminum Matrix Composites”, International Journal of Advanced
Manufacturing Technology, vol. 48, 537–555.
[12] M. N. Islam, N. H. Rafai and S. S. Subramanian [2010], “An Investigation into Dimensional Accuracy
Achievable in Wire-cut Electrical Discharge Machining”, Proceedings of the World Congress on
Engineering, Vol. 3
422