The Process And Principle Of Rail Grinding
Have you heard of rail grinding? In fact, it is the rails should be polished, and the corresponding wheels should also be polished. Because after a period of track use, wheels and tracks will appear some pockmarks and burrs, such as not grinding will cause track and wheels wear accelerated, and at the same time on the smoothness of the train operation impact.
- Product Introduction
Why grind rails? With the continuous improvement of modern train transport capacity and speed, the requirements for safe, smooth and comfortable travelling are becoming more and more strict. The quality of the rails, which are in direct contact with the train wheels, directly affects the safety and smoothness of the train. Affected by the power of the train, the natural environment and the quality of the rails themselves, the rails are often damaged, such as cracks, abrasion and other phenomena.
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Rail grinding process rail grinding is mainly through the grinding machine or grinding train on the top of the rail rolling surface grinding. To the highest efficiency, the most widely used rail sanding car as an example: sanding train driven sanding machine with a certain walking speed in the rail travelling, the formation of sanding head and the relative feeding movement between the rail, sanding motor vertical upright and directly drive the sanding wheel rotating, and at the same time on the sanding head to exert a certain downward pressure, in order to achieve the pressure sanding and grinding of the rails.
Rail grinding mainly includes line rail grinding and turnout rail grinding, which is divided into pre-plugging preventive grinding and trimming rational grinding.
1. Pre-polishing. Rail (including turnout area rail) pre-polishing is to lay on the new rail grinding, the purpose is to remove the rail surface decarburisation layer, to eliminate the rail in the production, welding, transport and construction process of surface defects, correction of the rail head contour, improve the welded joints smoothness.
2. Preventive grinding. Preventive grinding is the periodic grinding of rails (including turnout area rails), the purpose is to repair the rail head contour, eliminate the surface of the rail produced by micro-cracks and other shallow diseases, improve the wheel-rail action relationship, to prevent fatigue cracks in rails, wave grinding and other diseases and development.
3. Repair rational grinding. Repair rational grinding is the rail (including fork area rail) has produced disease rail grinding, the purpose is to amend the rail head profile, eliminate or slow down the rolling contact fatigue cracks, wave (corrugated) abrasion and abrasion and other diseases.
Product link:https://www.youtube.com/watch?v=zA4z7tuHq4M
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Alina Shen
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