Integrated ANN-GA for estimating the minimum value for machining performance

In this study, we proposed a new approach in estimating a minimum value of machining performance. In this approach, artificial neural network (ANN) and genetic algorithm (GA) techniques were integrated in order to search for a set of optimal cutting condition points that leads to the minimum value of machining performance. Three machining cutting conditions for end milling operation that were considered in this study are speed (v), feed (f) and radial rake angle (gamma). The considered machining performance is surface roughness (R-a). The minimum R-a value at the optimal v, f and gamma points was expected from this approach. Using the proposed approach, named integrated ANN-GA, this study has proven that Ra can be estimated to be 0.139 mm, at the optimal cutting conditions of f = 167.029 m/min, v = 0.025 mm/tooth and gamma = 14.769 degrees. Consequently, the ANN-GA integration system has reduced the R-a value at about 26.8%, 25.7%, 26.1% and 49.8%, compared to the experimental, regression, ANN and response surface method results, respectively. Compared to the conventional GA result, it was also found that integrated ANN-GA reduced the mean R-a value and the number of iterations in searching for the optimal result at about 0.61% and 23.9%, respectively.