Rail repair technology based on high-pressure abrasive water jet

To investigate the rail repair process based on high-pressure abrasive water jet, simulation analysis of its machining process is carried out based on smoothed particle hydrodynamics with finite element method (SPH-FEM). First, through the water jet cutting experiment, analysis of simulation data and experimental results are compared, and the results are basically the same in terms of values and trends. The depth of cut decreases with the increase of transverse speed, increases with the increase of abrasive flow, and tends to increase and then decrease with the jet pressure and target distance. Then, the rail top surface is repaired by high-pressure abrasive water jet technology, and the experimental results show that the repaired rail surface fully meets the rail grinding and repair standards. The repaired rail surface roughness of 2.648 μm is better than the rail milling train repair index value of 56.2%, which verifies the feasibility and effectiveness of rail repair based on high-pressure abrasive water jet technology.