Research on Underwater Jet Electrochemical Machining with Assistance of Cathodic Plasma
Electrochemical machining is often applied in the machining and repair of the structural parts of the undersea workstations and submarines as a key technology for underwater in-situ machining.Jet electrochemical machining is a special type of electrochemical machining,which has the advantages of simple machining device and good flexibility.However,it often causes electric field dispersion during machining and reduces the localization of machining.To solve this problem,a method of underwater jet electrochemical machining with assistance of cathodic plasma was proposed,in which the violently generated gas film and induced plasma film on the end surface of the electrode can isolate the electrode from the electrolyte,to confine the current distribution as Gaussian distribution in the electrolyte jet.The result indicated that underwater jet electrochemical machining can obtain micro-pit machining result that are basically same as in air.By adjusting the amplitude of the pulse voltage,the underwater jet electrochemical machining process can be effectively regulated,and improve the density of the gas/plasma film,enhance the insulation effect of the tube electrode sidewall,compress the liquid film thickness on the workpiece surface,and thus improve the localization of machining.
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