Paper Title
Fitting Regression Model and Plotting Contour Plots to Investigate Critical Cutting Parameters for Achieving Economical Machining Output of a Cryogenic Soaked Magnesium Alloy

Abstract
The objective of this work is to identify the critical cutting parameter out of speed, feed, depth of cut and approach angle of the cutting tool by fitting linear regression model between the output variable and the input variable along with analysis of variance method to compute contribution of each of these parameters on the quality of machined output. The response output variables taken up for this analysis were surface roughness, material removal rate, tool wear rate and machining time as all these factors governs the quality of the machined product and hence relates to economics of machining. Contour plots have been drawn to study about interactions between the input cutting parameters and its impact on the output variables. From the results it was observed that surface roughness is mostly affected by feed closely followed by approach angle of cutting tool whereas material removal rate, tool wear rate and machining time were mostly affected by depth of cut. It was also observed that cryogenic soaking suitably increases the hardness of the material thus making it handier for machining purpose. Keywords - Economical Machining, Regression modelling, CNC Turning, Cryogenic Soaking, Magnesium alloy