Effect of surface topography of fiber laser dressed resin-bond diamond wheel on its grinding performance

The surface topography of laser dressed diamond wheel is different from that of conventional methods, including grain uniformity, grain protrusion height, and grain state, all of which signally affect the wheel grinding performance. This paper focused on the influence of the topography of the laser dressed resin-bond diamond wheel on grinding performance. The resin-bond diamond wheel was dressed with different laser conditions, and the wheel topographies were observed. The cemented carbide workpieces were ground by the wheel with different topographies, while the grinding force and the surface roughness were measured to evaluate the grinding performance. In the comparative experiment, the difference between laser dressing with mechanical dressing was discussed. The results showed that the average laser power had the greatest effect on wheel surface topography and thus influenced the grinding performance. The appropriate laser dressing conditions were that the average laser power was 10 W, the pulse frequency was 100 kHz, and the spot overlapping ratio was 50% in this work. The diamond wheel had better grain integrity and could accurately control the protrusion height by the laser dressing process, while with the mechanical method, there were defects such as abrasion, fracture, and falling off. The laser dressing allowed for better wheel topography and grinding performance.