Abstract
During electrochemical drilling, use of bit type of tools produce more accurate holes as compared to bare type of tools. But, no model is available to predict anode profiles obtained during electrochemical bit drilling (ECBD). In this paper, models SBFET-11 (one dimensional analysis) and SBFET-22 (two dimensional analysis), based on finite element technique, have been proposed. The models are capable to predict the workpiece shape and size obtained either by bit type of tool or bare type of tool. The models can analyse both types of workpieces, i.e. the workpiece having a predrilled hole and the workpiece without a predrilled hole. Some assumptions made in earlier models regarding zero void fraction, constant electrolyte flow velocity, zero feed rate in transition and side zones etc., have been relaxed. Special attention has been paid on the analysis of anode profile in the transition zone and its effects on the accuracy of the computed anode profile in side zone. Comparison of analytical and experimental anode profiles has revealed a good agreement between the two.
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