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REGRESSION ANALYSIS OF THE SURFACE ROUGHNESS IN ABRASIVE WATER JET CUTTING

The abrasive water jet (AWJ) cutting technique is one of the most rapidly improving technological methods of cutting materials. In this paper a mathematical model for analysis and prediction of surface roughness during AWJ cutting of aluminium plate is developed based on experimental observations. Dependent variable in the model is average surface roughness, while independent variables are depth of cut in cutting process, traverse speed and abrasive mass flow rate. To evaluate results, analysis of variance (ANOVA) method is performed. Obtained regression model results suggest that regression modelling can be useful tool for analysing surface roughness in abrasive water jet cutting process.

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