Title: Comparison of central composite and orthogonal array designs for cutting force and surface roughness prediction modelling in turning

Authors: G. Srinivasa Rao; A. Neelakanteswara Rao

Addresses: Mechanical Engineering Department, RVR&JC College of Engineering, Guntur – 522 019, A.P., India. ' Mechanical Engineering Department, National Institute of Technology, Warangal – 506 004, A.P., India

Abstract: Development of empirical models in turning operation has been a major activity in metal cutting research. This paper presents an application of central composite face centred (CCF) and L₁₈ (2¹ × 3⁷) orthogonal array designs for developing cutting force and surface roughness models in case of turning AISI 1015 steel with HSS tool. Three process parameters namely cutting speed, feed, depth of cut and three tool parameters namely side cutting edge angle, inclination angle, normal rake angle were considered in developing the cutting force and surface roughness models. Each parameter was set at three levels. Based on the experimental data, mathematical models in terms of process and tool parameters were developed using multiple linear regression. Finally, central composite and orthogonal array designs are compared with respect to effect analysis and empirical model building. Confirmation tests were performed to verify the predictability of the developed models.

Keywords: turning; cutting force; surface roughness; process parameters; tool parameters; central composite design; orthogonal arrays; multiple regression; steel; modelling; cutting speed; feed; depth of cut; side cutting edge angle; inclination angle; normal rake angle.

DOI: 10.1504/IJMPT.2012.047641

International Journal of Materials and Product Technology, 2012 Vol.43 No.1/2/3/4, pp.144 - 164

Received: 30 Oct 2010
Accepted: 08 Aug 2011
Published online: 17 Sep 2014 *

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