Fabrication of vitrified bond diamond grinding wheel via UV-curing

Abstract

This paper presents an additive manufacturing UV-curing successful fabrication of vitrified bond diamond grinding wheel. High-performance vitrified bond was obtained by high-temperature melting of SiO2-B2O3-Al2O3-Na2O ceramic raw materials and used for grinding wheel preparation. UV-curing technology is characterized by high precision in shaping, fast processing speed, and superior quality, making it a promising technology for the fabrication of vitrified bond diamond grinding wheels. In order to meet the requirements for UV-curing of the grinding wheels, the preparation of vitrified bond slurry with high solid content and low viscosity was extensively investigated. The effects of dispersant, particle size of vitrified bond, and solid content on the viscosity of the slurry were systematically analyzed. Furthermore, in order to explore the optimal formulation of the grinding wheel, debinding and sintering conditions, sintering temperature, grit-to-bond ratio, and the evaluation of the grinding performance of the wheel on hard and brittle materials such as silicon carbide ceramic were studied. The results show that the vitrified bond diamond grinding wheel exhibits optimal comprehensive performance with a sintering temperature of 680°C and a grit-to-bond ratio of 7:3. The minimum surface roughness of the workpiece after grinding is 1.767 µm, the material removal rate is 5.08 mg/s, the grinding ratio is 9.78, and the friction coefficient is stabilized at about 0.5 during grinding. This paper provides guidance for the manufacture of vitrified bond diamond grinding wheels by UV-curing.