Modeling and predicting ground surface topography on grinding chatter

Surface integrity is a major factor to influence the contact property of the workpiece. Grinding is the common process to accomplish the workpiece's surface integrity in modem mechanical processing. However, grinding chatter always stems from the inside of the grinding system and can result in the low precision of the workpiece's surface topography. In order to investigate the relationship between the system's dynamic characteristic and the workpiece's surface topography, a two-DOF(Degree of Freedom) dynamic model in consideration with the three kind impacts is established accordingly. Then, the dynamic results are coupled into the grit trajectory equation with the grits' non-Gaussian distribution on the grinding wheel. Finally, experiments are conducted to testify the validity of the proposed model. The conclusions can be applied to optimize the workpiece's topography by adjusting the dynamic parameters to weaken the chatter's influence. (C) 2018 The Authors. Published by Elsevier Ltd.