International Journal of Mechanical and Production Engineering (IJMPE)
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  Journal Paper

Paper Title :
Optimization of CNC Lathe Operation by ANOVA and Validation using Gradient Descent

Author :Hamzah Khan, Faizan Anwar, Imtiyaz Ali Khan

Article Citation :Hamzah Khan ,Faizan Anwar ,Imtiyaz Ali Khan , (2018 ) " Optimization of CNC Lathe Operation by ANOVA and Validation using Gradient Descent " , International Journal of Mechanical and Production Engineering (IJMPE) , pp. 49-54, Volume-6,Issue-6

Abstract : The following study discusses an investigation into the use of full factorial design methodology for parametric study of turning operation response variable. ANOVA was used to identify the dependency of our response variable i.e. Surface Roughness on input parameters i.e. Speed, Feed and Depth of Cut. 27 experimental runs were conducted to define the ideal conditions of input parameter. To validate the dependency results from ANOVA we have applied a widely used algorithm from Machine Learning - Gradient Descent. The algorithm iteratively models our response parameter as an output of our input variables and updates the coefficients over a predefined number of iterations and learning rate. The coefficients output from Gradient Descent validate the ones from ANOVA. MINITAB 17 software was used to perform the analysis for ANOVA and the Gradient Descent algorithm was written in Python. Main effect plot is used to determine optimum value of individual response. Interaction plots are used to determine whether there is an effect of one factor on the level of other factors. Normality tests were conducted to validate assumptions involved in ANOVA. The optimum value of Surface Roughness is 0.6 micron at speed 800 rpm, feed 40mm/min and depth of cut 1.0 mm. Keywords - CNC Lathe, ANOVA, Composites, Silicon Carbide, Gradient Descent, Machine Learning

Type : Research paper

Published : Volume-6,Issue-6


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