Parametric Optimisation during Abrasive Jet Machining of Ceramic Using Taguchi Method

Abstract

In this present investigation, drilling on ceramic plate by Abrasive Jet Machining (AJM), has been carried out by using Silicon Carbide (SIC), as abrasive of 80 μm grit size. The most important output response is Material Removal Rate (MRR), during the AJM. The main input variables that affect the output responses are Nozzle Diameter (ND), Gas Pressure and Stand-Off Distance (SOD). These effective process parameters have been selected based on the literature review. Silicon Carbide abrasive with grit size of 80 μm has been chosen to find out the effect of process parameters, during making the holes on ceramic plate. The experiments have been done by selecting L9 Orthogonal Array and results have been optimised with the Taguchi method. ANOVA is used to identify the significant process parameters. Statistical results (at a 95% confidence level) show that the nozzle diameter, SOD and gas pressure have percentage contribution of 21.79%, 76.02% and 2.08%, on MRR respectively. The result shows that the maximum MRR value of 0.012 gm/sec has been obtained by the Taguchi's optimisation method. From the results obtained by ANOVA, it has been observed that the stand-off distance is the 76most significant parameter. Surface plot represents the relationship between the output response variable (MRR) and input predictor variables (Nozzle Diameter, Stand-off Distance and Gas Pressure).