Revolving cathode tool and method for co-rotating electrochemical machining of inner wall of aero-engine casing

A revolving cathode tool for co-rotating electrochemical machining of an inner wall of an aero-engine casing, comprising a power supply, a cathode shaft, an anode workpiece and a flexible cathode assembly, wherein the cathode shaft is electrically connected with a cathode of the power supply, and the anode workpiece is electrically connected with an anode of the power supply;

• one end of the cathode shaft is connected with the flexible cathode assembly;
• an insulated window and a conductive sliding block are arranged on a side wall of the flexible cathode assembly;
• the insulated window is matched in shape with convex structures in array distribution on an inner wall of the anode workpiece, and the conductive sliding block is matched in shape with convex structures in non-array distribution on the inner wall of the anode workpiece;
• and the outer side of the conductive sliding block is flush with an outer side wall of the flexible cathode assembly.