Simultaneous parametric optimization of micro-EDM drilling of brass C360 using Taguchi based grey relation analysis

Micro-EDM (Electro Discharge Machining) is widely used for precision manufacturing and drilling micro-holes in materials fuel nozzles, micro sensors robots, surgical instruments, turbines etc. Present paper deals with common C360 brass components by micro-machining optimizing the process parameter using a hybrid approach of design experiments (DoE) grey relation analysis (GRA) concept. The three responses considered are material removal rate (MRR), tool wear (TWR) taper drilled hole while four selected controllable parameters capacitance(C), voltage(V), feed rate(f) rotational speed electrode (N). Significance input factors on each response analyzed help 24 full factorial conducting 16 at two levels factors. Optimum robustness established through Taguchi’s S/N ratio. A combined grade applied to find conducive MRR TWR simultaneously.