Press Mounting Force Monitoring of Rolling Bearing of the Freight Train Considering Cylinder Friction

An automatic press mounting system of rolling bearing is introduced, which is used to execute the press mounting tasks of the rolling bearing in the bearing overhaul workshop of the railway system. As the datum gathered by the acquisition system has contained friction force of the press mounting hydro cylinder, the press mounting monitoring precision is reduced and the press mounting result judgment is affected. To eliminate the influence of the cylinder friction, friction modeling and compensation of the press mounting hydro cylinder were studied. The friction models of the cylinders were identified through experiments and parameters regression analysis. Based on the friction models, the press mounting force datum was corrected. The experiments results show that the monitoring datum considering the hydro cylinder friction is closer to the real press mounting force, and the misjudgment of the mounting result is obviously reduced.