Study of the grinding performance of laser-trued and dressed bronzed-bonded diamond grinding wheels

Abstract

A triangulation-based closed-loop control system with high-precision couple charged device (CCD) laser displacement sensors was used to true and dress a bronze-bonded diamond grinding wheel online with an acousto-optic Q-switched neodymium-doped yttrium aluminum garnet (Nd:YAG) laser. The microscopic surface topography of the trued and dressed grinding wheel was observed using a three-dimensional (3D) microscope with an ultra-large depth of field. The results showed that the diamond abrasives were uniformly distributed on and protruded from the surface of the bronze bond, which indicated good topography of the grinding wheel. Orthogonal grinding experiments were conducted on the laser-dressed bronze-bonded diamond wheel, and three quality evaluation indices, the grinding ratio, the grinding force ratio, and the workpiece surface roughness, were measured and calculated. The results of the grinding experiment were systematically analyzed using a gray relational analysis. Under the experimental conditions of this study, the dominant factor that affected the quality evaluation indices was the laser spot diameter, followed by the pulse duration. The laser power was a secondary factor.