Grinding efficiency improvement equated to material removal rate is widely seen through deployment of wheel speed parameter. The enhanced wheel speed demands usage of super-abrasive wheels which has high bonding strength and cutting ability. Although a vitrified type CBN/Diamond wheel has superior bonding and cutting qualities, the widespread usage is hampered by difficult and in-efficient wheel preparation processes. This paper introduces a new speed reversal method of vertical cup dressing that enhances the truing rate by 2 to 3 times and hence complements the precision grinding. Also this method has successfully removed the bonding materials to expose grit without roughening.
Keywords: super abrasives, grinding, wheel speed, truing, dressing