Study on the surface topography of the vibration-assisted belt grinding of the pump gear

The surface performance of pump gears has an important influence on the internal flow field, flow rate and flow fluctuation amplitude, instantaneous flow rate, and other performance of the pump during operation. When grinding gear surface with conventional grinding wheel, it is easy to cause over-cutting and edge collapse at the end edge of gear teeth, which is not satisfactory for pump gears. Vibration-assisted abrasive belt grinding can solve the problems of over-cutting and edge collapse at the end face edge of gear teeth caused by conventional grinding and significantly improve the surface performance of gear teeth. However, the method of gear grinding based on vibration-assisted abrasive belt grinding and the law of surface formation have not yet been mastered, so it is difficult to accurately express the surface topography. In this paper, the effects of grinding pressure, vibration frequency, belt linear velocity, and grinding time on surface roughness and surface topography of pump gear during vibration-assisted abrasive belt grinding are studied by single-factor experiment. The experimental results show that in order to synthetically improve the characterization parameters of the surface and improve the surface morphology, the range of parameters should be chosen as follows: grinding pressure (30–50 N), vibration frequency (more than 8 Hz), belt linear velocity (less than 7 m/s), and grinding time (20–40 s).