Cutting fluid performance in fine grinding

Abstract

The cluster overcut fly grinding (COFG) technique in which a small patch of grains is used to grind a surface instead of using the entire wheel face was considered as a means for evaluating grinding fluids in terms of reduction in adhesion and wheel wear. The rate of wear was found to be similar for the COFG and complete wheel cases for a variety of grinding combinations provided that the undeformed chip thickness was maintained constant and an adjustment was made for the difference in the amount of material removed per grain in the two cases. At a normal wheel speed (6300 ft min −1 (32 m −1 s)) Al 2O 3 was found to give less wear than SiC when grinding AISI-SAE T15 tool steel and an undiluted grinding oil was found to be the most effective of the fluids tested. However, when titanium alloy Ti-6Al-4V was ground at normal speed, SiC was found to give the best results using an extreme pressure grinding oil water solution of concentration 10 wt.%.