Articles written in Sadhana

    • Structural equation modeling-based performance estimation and parametric analysis of wire electrical discharge machining processes


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      This paper deals with development of structural equation models for two wire electrical discharge machining (WEDM) processes so as to investigate and estimate their machining performance along with identification of the most significant input parameters influencing the operational achievement of the said processes. These models also search out the corresponding responses to be treated as the best performance indicators for both the WEDM processes. Based on the experimental and simulated datasets, two models are subsequently developed showing the relationships between the input parameters, responses and machining performance for each of the considered WEDM processes. For both the processes, it is observed that the second model, developed without considering the insignificant input parameters, has better goodness-of-fit value as compared to the first model where all the WEDM process parameters are contemplated as the predictor variables. It can be revealed that pulse-on time is the most important predictor of machining performance with standardized coefficients of 0.61 and 0.75 respectively for the two WEDM processes. Machining rate acts as the main indicator variable in the first experimental dataset, while gap current is the most significant indicator variable in the second experimental dataset with factor loadings of 0.98 and 0.92 respectively

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