One-process surface texturing of a large area by electrochemical machining with short voltage pulses

Micro texturing is performed over a large area of a metal surface by an appropriate electrochemical machining. A micro texture pattern with a size of several tens of micrometers is fabricated on a millimeter-scale tool electrode surface and is simultaneously replicated on the workpiece in one process. A shorter pulse width is required for better machining accuracy, and then branched electric feeding is adopted because the minimum machinable pulse width is limited due to the inductance of the power supply circuit. Micro textures smaller than a hundred micrometers could be achieved with a machining area of several tens of square millimeters.