Parametric Optimization of CNC Milling of Al-7075 Based MMCs

2021 
The advantages of flexible modification of machining technology with advanced design for achieving alternate machining, automatic tool changing, varying the working parameters, load modification by the tool mostly influence the numerically assisted machining process. For the CNC milling machining operation, the work piece should be normally economical and efficient. Machining time can be calculated easily by considering detail tool motion during machining and positioning. This paper represents the end milling operation of Al-7075 based metal matrix composites (MMCs) as the work piece due to its high strength and stiffness, less density, high electrical performance and high wear resistance. Taguchi methodology is subjected to minimize the number of experiments. This paper is dealing with the optimization of selected milling process parameter that is spindle speed, feed rate and depth of cut. After conducting the number of experiments using the Taguchi L9 orthogonal array, the surface roughness and material removal rate are optimized with of ANOVA. The parameter contribution for reduction of SR and improvement of MRR was found and error percentage can be validated.
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