Multi-objective Optimisation of Electro Jet Drilling Process Parameters for Machining of Crater in High-Speed Steel Using Grey Relational Analysis
In the present investigation, electro jet drilling has been implemented to machine crater in the high-speed steel sheet. Input parameters (applied voltage, electrolyte concentration, and standoff distance) were varied to study the change in output characteristics of the crater (mass removal rate (MRR), roundness error (RE) and mean diameter-to-height ratio (DHR)). MRR was found to increase with the increase in applied voltage and electrolyte concentration, while an increase in standoff distance was found to cause a decrease in MRR. RE was found to increase with applied voltage and standoff distance, while the increase in electrolyte concentration was found to cause a reduction in RE. DHR was increased with the increase in electrolyte concentration and standoff distance, while an increase in applied voltage resulted in the decrease of mean DHR. Optimization of input parameters was carried out to (a) maximize MRR and mean DHR and (b) minimize RE, of the machined crater, using Taguchi grey relation analysis.
KeywordsElectro jet drilling High-speed steel Optimisation Electrochemical machining Crater
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