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2006
Conference Paper
Titel
Electrochemical drilling of deep micro holes with bulk electrodes
Abstract
The potential of ECM for fast machining of microholes smaller than 100µm in diameter in steel was investigeted. The influence of rotation speed of a micro drill cathode in the electrolyte transport was investigated with a threedimensional COMSOL Multiphysics model. Therefor coupling between fluid dynamics, electric current density and ion transport through diffusion and convection was used. In addition an experimantal setup with a three axes system and high performence motor spindle placed ad the Z-axis was relised. Serveral commercial micro drill electrodes were supplied by an industrial tool manufacturer. The applied electrolyte was a solution of sodium nitrate with a chelating agent. With this setup micro holes with diameters smaller than 200 microns eroded.