Multiobjective Optimization for Wire Edm of Wc-co Composite Using Gra with Entropy Measurement
نویسندگان
چکیده
Selection of machining conditions for improved performance characteristics has great importance during wire EDM, because numerous control factors contribute during machining. In the present study an attempt has been made to find the optimal machining conditions for multi performance characteristics simultaneously by applying grey relational analysis using entropy measurement for which Taguchi based L9 orthogonal array has been used for conducting experiments. The performance characteristics considered are cutting rate and surface roughness. Peak current, pulse on time, pulse off time and wire feed rate are considered as input parameters. Optimal machining conditions obtained are peak current at 200 A, pulse on time at 18 μs, pulse off time at 40 μs and wire feed rate at 7 m/min.The predicted results have been verified by conducting confirmation experiments. Keywords‒Wire EDM, Tungsten carbide, Grey relational analysis, Grey entropy, Taguchi
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