Universal Journal of Mechanical Engineering Vol. 4(3), pp. 69 - 73
DOI: 10.13189/ujme.2016.040303
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Evaluation of Surface Roughness and Material Removal Rate in End Milling of Complex Shape

Suha K. Shihab ^1,*, Ethar Mohamed Mahdi Mubarak ^2
1 Department of Materials Engineering, Engineering College, Diyala University, Iraq
² Mechanical Department, Institute of Technology, Middle Technical University, Iraq

ABSTRACT

In this work, an attempt has been made to analyze the influence of various machining input parameters of CNC end milling process viz. cutting speed, feed rate and depth of cut on machining output variables (surface roughness and material removal rate) during machining complex shape of copper. Three different levels of input parameters were planned as per Taguchi's L₉ orthogonal array. The parameters are optimised from analysis of mean (ANOM). Analysis of variance (ANOVA) was employed to investigate the effect of machining parameters on the variables. Results of this study indicate that the depth of cut has the most significant effect on R_a having percentage contribution of 71.06% followed by feed rate and cutting speed having percentage contribution of 23.22% and 2.12% respectively. For material removal rate, it is observed that the percentage contribution of feed rate is maximum i.e. 68.58% followed by depth of cut and cutting speed having percentage contribution of 22.13% and 7.52% respectively. Also, the results revealed that optimum combination of machining parameters which resulted in optimum value of the surface roughness is A₃B₁C₂ i.e. cutting speed of 6000 rpm, feed rate of 500 mm/tooth and depth of Cut of 0.06 mm. Similarly, optimum combination of machining parameters which resulted in optimum value of material removal rate is A₁,B₃C₃ where the values for cutting speed, feed rate and depth of cut are 2000 rpm, 1500 mm/tooth and 0.08 mm respectively.

KEYWORDS
End Milling, Surface Roughness, Material Removal Rate, Copper, Optimization

Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] Suha K. Shihab , Ethar Mohamed Mahdi Mubarak , "Evaluation of Surface Roughness and Material Removal Rate in End Milling of Complex Shape," Universal Journal of Mechanical Engineering, Vol. 4, No. 3, pp. 69 - 73, 2016. DOI: 10.13189/ujme.2016.040303.

(b). APA Format:
Suha K. Shihab , Ethar Mohamed Mahdi Mubarak (2016). Evaluation of Surface Roughness and Material Removal Rate in End Milling of Complex Shape. Universal Journal of Mechanical Engineering, 4(3), 69 - 73. DOI: 10.13189/ujme.2016.040303.