An Experimental Investigation During Micro Drilling of Hybrid Al/(Al2O3p+SiCp+Cp)-MMC onDeveloped ECMM Setup

This paper presents the effects of various parameters of fabricated electro chemical micro machining (ECMM) setup on machining response characteristics during micro drilling of Hybrid Al/(Al2O3p+SiCp+Cp)-MMC. AnECMM setup has beendesigned and fabricatedfor the purpose. Fabricated ECMM setup has different units such as mechanical machine unit, electrical power supply and control unit, electrolyte flow and control unit, servo control and electrode feed unit. From the experimental results, it is clear that the MRR increases with increase in supply current, supply voltage, pulse on time and electrolyte concentration but at same time overcut, and taper are also increased. During micro drilling, it is also observe that very low dimensional micro tools are not suitable for ECMM operation because of hightool wear by electrochemical dissolution. In this investigation,micro holes are generated with 271μm diametersteel micro tools. From experimental results, it is clear that the developed ECMM setup can be effectively used for generation of very fine micro holes on hybrid MMC workpiece.