This paper proposes an electrochemical drilling method of multiple holes in which the
reverse electrolyte flow is achieved in the way of electrolyte-extraction, instead of traditional
forward electrolyte flow which often causes poor electrolyte flow condition and so unstable
machining process. The combining manifold is optimized to equalize electrolyte flow rate in
each electrode tube. Furthermore, wedge-shaped electrode tubes are adopted in order to
distribute the electrolyte flow more uniformly while holes with inclination angles are …