Improvement of SF Truing Performance for Coarse Diamond Wheel by Using Ultra-Fine Bubbles Coolant

Abstract

SF truing method using a vertical rotary dresser is a technique that achieves high-efficiency and high-precision truing by ensuring the equal peripheral speed condition (Same-speed Function) of the diamond grinding wheel and the conventional grinding wheel (Dress wheel) for truing. In this study, the effect of incorporating ultra-fine bubbles (UFB) into the coolant used during SF truing is investigated. Static mixer equipment is used as a UFB generator. Diamond grinding wheel is SD140N100M or SDC140N100B, and dress wheel is GC80V. From the result of truing experiments, it is found that the normal truing force increase on the same-speed diameter of GC dress wheel and truing efficiency improve, when using the UFB coolant compared with using the conventional coolant. In addition, it is examined that free abrasive grains are efficiently hold on the surface of the dress wheel because of the high adhesion energy of the UFB coolant.