ABSTRACT
The cutting edges of the cubic boron nitride (CBN) grains on the brazed grinding wheel are one of the most important factors that determine the material removal behaviour. During grinding, the cutting edges of CBN grains can gradually wear into different forms. In this chapter, a finite element analysis model of single-CBN grain wear evaluation was built to simulate the wear behaviour in grinding. The model employs a full kinematic simulation of the high-speed grinding of Inconel 718 nickel-based superalloy with a single-CBN grain. The model encompassed both the friction and the chip formation process during the grinding process, thereby facilitating the investigation of the actual stress distribution during multiple grinding passes. Based on the powerful simulation method, the wear evolution of the CBN grain and its cutting edge were also deeply studied. The simulation results provide insights on grain chipping and its effect on grain morphology evolution, grinding force, and the formation of new cutting edges. In addition, the study helps facilitate the development of grinding wheel life expectancy model in future work.
