Abstract: In a method for electrochemical machining effected by disposing a work blank and a cathode opposite each other across a gap in an electrolyte and causing a flow of electric current to pass between said work blank and cathode, an improvement is disclosed which consists in using, as the electric current, a pulsating electric current having a pulse width of from 0.01 to 10 ms and a duty factor of not more than 0.5. Use of the pulsating electric current of the foregoing description in place of direct current enables the desired machining to be accomplished effectively on the work blank without involving any forced movement of the electrolyte.

Abstract: In a method for electrochemical machining effected by disposing a work blank and a cathode opposite each other across a gap in an electrolyte and causing a flow of electric current to pass between said work blank and cathode, an improvement is disclosed which consists in using, as the cathode, a thin wire having a non-linear shape and, as the electric current, a pulsed electric current and thereby machining the work blank to a desired shape.