Friction characteristics of sliding guideway material considering original surface functional parameters under hydrodynamic lubrication

The most common failure modes for guideway are wear and contact fatigue, which are significantly influenced by the friction properties of the contact surfaces. In this paper, three-dimensional surface parameters of surface roughness are investigated to evaluate guideway surface. First, an effective three-dimensional surface model is achieved using wavelet transform method and a reverse engineering software (Geomagic Studio). Secondly, effects of the functional surface parameters on friction force, mean pressure, and friction coefficient are studied using the computational fluid dynamics simulation method, and a regression model to predict friction force is achieved. Thirdly, the optimal surface parameters combinations are analyzed looking at friction property index, and the simulation results are compared. Finally, a verification test is conducted to detect the validity of the simulation research. The results show a good agreement between the experimental results and simulations. This study provides theoretical guidance for the manufacture of guideway.