ISSN(Online) : 2319-8753 ISSN (Print) : 2347-6710 International Journal of Innovative Research in Science, Engineering and Technology (An ISO 3297: 2007 Certified Organization) Website: www.ijirset.com Vol. 6, Issue 2, February 2017 Copyright to IJIRSET DOI:10.15680/IJIRSET.2017.0602018 1553 Optimization of Surface Roughness of 6463 Aluminium Alloy and Brass Materials in CNC Milling Operation Using Taguchi’s Design Y.Chandra Sekhar 1 , A.Gopichand 2 , R Sam Sukumar 3 , N.Pavan Kumar 4 Assistant Professor, Department of Mechanical Engineering, Swarnandhra College of Engineering & Technology, Narsapur, West Godavari, Andhra Pradesh, India 1 Professor, Department of Mechanical Engineering, Swarnandhra College of Engineering & Technology, Narsapur, West Godavari, Andhra Pradesh, India 2 Associate Professor, Department of Mechanical Engineering, Swarnandhra College of Engineering & Technology, Narsapur, West Godavari, Andhra Pradesh, India 3 U.G. Student, Department of Mechanical Engineering, Swarnandhra College of Engineering & Technology, Narsapur, West Godavari, Andhra Pradesh, India 4 ABSTRACT: Surface roughness is an important measure of the technological quality of a product and a factor that greatly influences manufacturing cost. Decreasing the surface roughness value in the manufacturing field improves end products quality. The optimization of high speed milling process parameters with respect to the surface roughness of samples and the study of the Taguchi design application to surface quality was experimented by using CNC end milling operation. The Taguchi design is an efficient and effective experimental method in which a response variable can be optimized by giving various control factors. An orthogonal array of L9 was used to carry out and to identify the significant factors affecting surface roughness. In the present investigation, the straight flute end-milling cutter was used for machining of 6463 Aluminium alloy and brass work pieces. The factors related to surface roughness are cutting speed, feed rate and depth of cuts. Confirmation test with optimal levels of machining parameters were carried out in order to illustrate the effectives of Taguchi’s optimization method. KEYWORDS: Optimization, Surface Roughness, Taguchi, Milling. I. INTRODUCTION One of the most common metal removal operations used in industry is the end milling process. It is common manufacturing process widely used in a variety of sectors, such as the aerospace, die, machinery design and automobile as well as manufacturing industries. In order to ensure the machining quality and to reduce cost and time, it is indispensable to develop research on milling process including the prediction of cutting forces, form errors and surface quality. The machined surface topography and the geometric shape and texture of the machined surface is essential because the latter directly affects the surface quality. Surface roughness is an important measure of the technological quality of a product and a factor that greatly influences manufacturing cost. The mechanism behind the formation of surface roughness is very dynamic, complicated and process dependent; it is very difficult to calculate its value through