Material removal mechanism of non-resonant vibration-assisted magnetorheological finishing of silicon carbide ceramics

In this study, the material removal mechanism of non-resonant vibration-assisted magnetorheological finishing (NVMRF) of SiC ceramics was researched for improving their surface quality and finishing efficiency. A theoretical model of the polishing forces considering the vibration was proposed to explain the effects of the vibration on the polishing forces. A theoretical model of material removal rate (MRR) based on the Preston equation was proposed for quantitative analysis by considering the synergistic effects of the normal force and total shear force. Moreover, a theoretical model and the smoothed-particle hydrodynamics (SPH) simulation of a single diamond abrasive for material removal were proposed to explain the reasons for the increase in the MRR. Combined designed processing experiment, introducing the vibration can enhance the normal force and total shear force, which make improvement of the MRR, surface quality and subsurface damage (SSD). Moreover, both the enhanced normal force and total shear force contribute to the MRR, and the normal force contributes more to the MRR than the total shear force. Thus, understanding the material removal mechanism of proposed NVMRF plays indispensable role to extend its application into more wider areas.