Simulation Study on Material Removal of Rail Grinding Based on Virtual Grinding Wheel Modeling

doi:10.3901/JME.2018.04.030

Abstract

Abstract: By means of the measurement and analysis of the actual grinding wheel surface topography, the density and height distribution of abrasive grains are obtained. Based on the virtual grid method, a virtual grinding wheel model is built, which the abrasive grains are randomly distributed and height is normally distributed. Furthermore, a 3D simulation model of rail grinding is established. The influence of different grinding rotational speed on grinding force, removal amount, surface roughness, grinding surface topography are simulated and explored. The rail grinding experiments are carried out by means of a rail grinding friction machine and the testing results are compared with the simulation results. The results show that the grinding force slightly decreases and the removal amount obviously increases with the grinding rotational speed increasing. The surface roughness decreases with the increasing of grinding rotational speed, but increases with the increasing of grinding depth. The surface of grinding rail exhibits many ploughing and regional material uplift. The simulation results are consistent with experimental results, which verify the reliability of simulating model for calculating the materials removal of rail grinding.

Key words: grinding force, rail grinding, removal amount, surface roughness, surface topography

CLC Number:

U211

SHANG Wei, ZHANG Shuyue, GUO Jun, LIU Qiyue, WANG Wenjian. Simulation Study on Material Removal of Rail Grinding Based on Virtual Grinding Wheel Modeling[J]. Journal of Mechanical Engineering, 2018, 54(4): 30-36.

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