Optimization of Machining Parameters for Tool Wear Rate and Material Removal Rate in CNC turning by Grey Relational Analysis

摘要

Tool wear and material removal rate (MRR) are the biggest intentions in modern Computer Numerical Controlled (CNC) machining. In the current study, L'9 orthogonal array for selecting the combinations of three process parameters (Cutting Speed, feed rate and depth of cut) have been used. The two response parameters in the current multi response parameter study are Tool Wear rate and Material Removal Rate. All the process parameters have 3 levels and in this study we are searching the single optimum condition on which both response parameters have optimum value. AISI 1045 is a medium carbon steel, which has a wide variety of applications in vehicle component parts and also in machine building industry, is used for current study of high speed turning. The most significant factor affecting MRR is Depth of Cut and most significant factor affecting Tool Wear Rate is Feed Rate. The optimum condition after simultaneous optimization comes out to be V2-F3-D3. The optimum value of the MRR and Tool Wear Rate comes out to be 721.76(mm~3/sec.) and 2.5142E-07(1/mm~2) respectively. Optimum results are finally verified with the help of confirmation experiments.