Abstract
Direct current magnetic abrasive finishing process provides hardly any stirring effect on static flexible magnetic abrasive brush (S-FMAB). Continuous use of S-FMAB and absence of stirring leads to dullness of abrasive cutting edges resulting in low finishing rate. To overcome this weakness of the process, the FMAB has been made pulsating using pulse direct current (DC) power supply. Empirical models have been developed to study the effects of pulse on-time, and duty cycle on: (i) percent decrease in Ra value , (ii) normal magnetic force, (iii) cutting force, and (iv) force ratio. A correlation between surface finish and magnetizing energy has been evolved. The use of the pulse DC power supply to the electromagnet has enhanced surface finish many folds as compared to the surface finish achieved by the use of DC power supply. This improvement in surface finish seems due to the formation and destruction of FMAB during on-time and off-time of the pulse power supply, respectively.
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