Electrochemical Machining of Blisk Channels with Progressive-Pressure Electrolyte Flow

Progressive-pressure electrolyte flow is employed to improve efficiency and accuracy of radial electrochemical machining of blisk channels. Flow field simulation indicates that the use of progressive-pressure flow gives a high electrolyte flow rate in the inter-electrode gap, allowing a high cathode feed rate without shortcut. Experiments show that the high feed rate leads to high machining efficiency. Under the progressive-pressure flow, the surface roughnesses of the convex part, concave part, and hub of channels are reduced and the machining accuracy of the hub is enhanced. Furthermore, the allowances of the hub can be reduced by using progressive-pressure electrolyte flow.

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