Steel rail grinding profile rapid prediction method based on interval segmentation

Abstract

The invention discloses a steel rail grinding profile rapid prediction method based on interval segmentation. The method comprises the steps of 1, establishing a quantitative relation model between the grinding amount of a single grinding wheel and grinding parameters; 2, according to geometrical characteristics of a section profile curve of the in-service steel rail and the grinding range of a grinding train, adopting an interval segmentation method for dividing to obtain steel rail profile interval sections with different curvatures; 3, calculating reference grinding areas of different intervals by adopting a grinding test method; 4, combining the calculated reference grinding area to obtain the real grinding area of the steel rail in each segmentation interval, reversely calculating a cutting point of the end face of the grinding wheel and the profile curve of the steel rail, and finally predicting the finally obtained grinding profile of the steel rail based on the steel rail grinding sequence forming mechanism. The method has the advantages of being high in calculation efficiency and accurate in prediction result, and the problem that a traditional steel rail grinding profileprediction method cannot rapidly complete profile prediction within limited skylight time is solved.

Description

technical field [0001] The invention belongs to the technical field of railway rail grinding, and in particular relates to a rapid prediction method for rail grinding profiles based on section division. Background technique [0002] Rail grinding is an important means of rail line maintenance. By removing rail surface materials reasonably, it can effectively suppress side grinding, corrugation, fatigue and other diseases, and achieve the purpose of repairing rail profile, improving wheel-rail contact performance and prolonging rail life. Before grinding the rail, it is necessary to reasonably select the grinding parameters of the rail according to the actual situation of the rail in service, such as the angle of the grinding wheel, the speed of the grinding wheel, and the grinding pressure, etc., and combine them to form a suitable grinding mode to ensure that the final profile of the rail after grinding is consistent with the grinding The target silhouette is consistent. A...

AI Technical Summary

Problems solved by technology

In order to achieve this goal, relevant research on the prediction method of rail grinding profile has been carried out. The patent number is CN201610209991.3 and the name is: a patent application for a rail grinding profile prediction method based on NURBS-Kriging, which can realize different grinding modes Prediction of the final grinding profile of the lower rail, but there are still problems of large amount of calculation and long calculation time. For example, it takes nearly 50 minutes to complete a grinding profile prediction with 96 grinding wheels, and the "skylight time" of rail grinding limited, which limits the field application of the above method, it is difficult to predict the final grinding profile obtained in any grinding mode in a timely and rapid manner, which affects the quality of rail grinding and the running stability of railway vehicles

Images