Electrochemical Machining by Bipolar Pulses. (Method of electrochemical machining by bipolar pulses)

摘要

(2) in the electrolyte by applying a bi-polar electrical pulse between the specimen (2) and the electrically conductive electrode (6) alternating with at least one current pulse of regular polarity alternating with a voltage pulse of the opposite polarity Is an electrochemical processing method. The amplitude Un of the voltage pulse is adjusted between the two predetermined values Un1 and Un2 derived from the generation of a given surface quality of the specimen 2 and the occurrence of wear of the electrode 6. [ During the test, the amplitude (Un) of the voltage pulse is gradually increased from the initial value to the final value. The two predetermined values Un1 and Un2 are determined according to the occurrence of sign inversion in the difference between consecutive values of the factors indicating the property of the gap 5 between the electrode 6 and the specimen 2. The factor can be the amplitude of the microscopic point (Umin) resulting from the oscillating motion of the specimen 2 and the electrode 6 across the gap 5 during the current pulse. The factor is the integral (Qn) of the current across the gap 5 during the voltage pulse; Or the integral (Fp) of the voltage across the gap 5 during the current pulse; Or a resistance across the gap 5; Or the size (St) of the gap (5).