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Edit:Zongxiang Heavy Industry--Lucas Date:2020-05-08 14:30:13
Before the high-speed railway is opened to traffic, the rail needs to be polished. This polishing strategy is called pre-polishing. It is not only for high-speed railway, but also for new railway lines. After completion, the rail needs to be polished before formal operation. Its purpose is to remove the traces of rail rolling, decarburized layer, solder joints at rail joints and improve the surface roughness. Its ultimate purpose is to eliminate the traces of rail surface defects and prevent the further development of these defects, thus improving the service life of the rail. railway track material
In addition to pre-polishing, rail polishing strategy includes preventive polishing, maintenance polishing (also called maintenance polishing) and repair polishing (also called corrective polishing)
When it comes to rail grinding, we have to talk about rail diseases first. We all know
Under extremely complicated working conditions, various damages will inevitably occur, including defects in smelting process and damages in transportation, construction and use. that high-speed trains, bullet trains, subways and other locomotives do not have steering wheels. The driver does not need to operate the direction and guides the vehicle through the rail, so the rail carries huge pressure and impact force from the wheels. railway track material
Common damages include rail abrasion: including vertical abrasion, side abrasion and wave abrasion (wave abrasion for short); Contact fatigue damage: including rail head crack, hidden damage and stripping; There are also fat edges and rail scratches. railway track material
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