Peridynamic Simulation to Fracture Mechanism of CBN Grain in the Honing Wheel Dressing Process

Abstract

Regularly dressing of CBN honing wheel is an effective way to keep its sharpness and correct geometry during honing process. This study aims to understand the fracture mechanism of single CBN grain in the dressing process of honing wheel. The honing wheel dressing process was simplified into the dressing process of grinding wheel, and the bond-based Peridynamic method considering bond rotation effect was developed to investigate the progressive fracture evolution, stress characteristics, and fracture modes of CBN grains in this process. It was found that fracture evolution of CBN grains mainly underwent four stages: elastic deformation, damage initiation, crack formation, and macro fracture. In addition, the fracture initiation and propagation were mainly determined by the tensile and shear stress, where the former led to mode I fractures and the latter led to mode II fractures. The propagation of mode I fractures was stable while the propagation of mode II fracture was unstable. The results show that the Peridynamic approach has great potential to predict the fracture mechanism of CBN grain in the dressing process of honing and grinding wheels.

Modeling of Specific Energy in the Gear Honing Process

“…Therefore, it is typically used as the final gear finishing process to improve the sound characteristics and lifespans of hardened gears. The performance of gear honing is typically evaluated by honing force [1], surface roughness after honing [3], the geometry of abrasive grains [4,5], and the fracture of abrasive grains [6]. However, none of these parameters can quantitatively measure the honing efficiency in the honing wheel and workpiece gear interaction process.…”