An electrolytic processing method that uses electrolysis to remove burrs from metal parts, referred to as ECD in English. Fix the tool cathode (usually made of brass) near the burr part of the workpiece, with a certain gap (usually 0.3 to 1 mm) between them. The conductive part of the tool cathode is aligned with the burr edge, and the other surfaces are covered with an insulating layer to concentrate the electrolysis on the burr part. During processing, the cathode of the tool is connected to the negative pole of the DC power supply, and the workpiece is connected to the positive pole of the DC power supply. A low-pressure electrolyte (usually sodium nitrate or sodium chlorate aqueous solution) with a pressure of 0.1 to 0.3 MPa flows between the workpiece and the cathode. When the DC power supply is turned on, the burrs will dissolve in the anode and be removed, and will be taken away by the electrolyte. The electrolyte is corrosive to a certain extent, and the workpiece should be cleaned and rust-proofed after deburring. Electrolytic deburring is suitable for removing burrs from cross holes in hidden parts or parts with complex shapes. It has high production efficiency and the deburring time generally only takes a few seconds to tens of seconds. This method is commonly used for deburring gears, splines, connecting rods, valve bodies and crankshaft oil passage openings, as well as sharp corner rounding, etc. The disadvantage is that the parts near the burrs are also affected by electrolysis, and the surface will lose its original luster and even affect the dimensional accuracy.
