Laser precision profiling of small-angle bevel-edge contour grinding wheels

Abstract

A deflectable pulsed fibre nanosecond laser was employed in systematically studying the profiling small-angle bevel-edge contour diamond grinding wheels. There is taper error in laser profiling grinding wheel technology as with other laser removal technologies and little research on the formation factors and suppression measures. In this paper, the mathematical model of the laser energy variation on bevel contour was first proposed, which theoretically explained the reasons for the angle error of laser profiling the bevel-edge contour. The ways to boost the contour accuracy and enhance surface quality were investigated. The results demonstrated that the smaller the bevel profile angle, the more scattered the focused laser irradiated on the grinding wheel surface, and the higher the reflectivity of the laser on the profiled surface. The above factors caused an extreme decrease in the laser power density irradiated on the grinding wheel, which led to taper error. It was found that the surface quality deteriorated, the obvious ablation marks appeared on the profiled surface as the overlap rate decreased, and adjusting the laser deflection angle could effectively eliminate the angle error of the bevel contour and improve the profiling accuracy. After laser profiling, the purpose of precision profiling the bevel contour of 11° could be achieved by setting the laser deflection angle of about 1°, and the PV value of the bevel contour reached 5.812μm. The mathematical model of laser profiling bevel contour established in this work can also be applied to other laser processing courses.