Effect of continuous and pulse DC on processing time, electrolyte composition and electrolyte concentration of electrochemical honing

摘要

The use of pulse DC in ECH (PECH) provides the relaxation period to the electrochemical machining (ECM) zone of the system, discharge the dregs out of the inter electrode gap during pulse-off time, which helps to improve the process performance characteristics. This paper is an attempt to present a comparative analysis of continuous and pulsed DC to examine the effect of type of power supply on the processing time, electrolyte concentration and electrolyte composition. The surface finish was evaluated in terms of percentage improvement in average roughness value and maximum roughness value. The sets of experiments for ECH and PECH of recovered surfaces made of EN52 alloy steel were conducted. The results reveal that the use of pulse DC helps to improve anode potential and coping accuracy. But, the use of a pulsed DC power supply may increase the time required to achieve the desired quality level of work surface.