Micro-nano Vibration Assisted Grinding Effect of K9 Glass on Surface Quality

Abstract

Through adding high-frequency micro vibration to conventional grinding technique, micro-nano vibration-assisted grinding can reduce grinding force, increase material removal rate and improve surface quality. Some hard and brittle materials, processed through ultrasonic vibration-assisted grinding, have been widely adopted in efficient and quality manufacturing of aerospace, optical instruments and microelectronics. In order to explore how micro-vibration-assisted grinding influences the quality of materials surface, we conducted grinding experiments on K9 glass with diamond grinding head and analyzed the surface quality and material removal mechanisms under different micro-vibration conditions. The results showed that the grinding trajectories became denser, and the micro-vibration-assisted grinding increased the number of effective grinding grains during grinding and reduced the surface roughness. It was found that under the same grinding depth, micro-vibration-assisted grinding just led to micro-breakage instead of large pieces of material falling off in conventional grinding, thereby reduced the surface damage. Through the microscope and white light interferometer, the grinding trajectory became denser under micro-vibration conditions and the trajectory length per unit area increased considerably, which can reduce the surface roughness to a certain extent.