Experimentation And Procers Research On Belt Grinding Process Of Rail Material

With the rapid development of high-speed railway in China,the railway operation business is getting busier,which makes the steel rail suffering more damages,and the online repairing time is shortened,However,the existing steel rail online repairing methods have many shortcomings.It is urgent to adopt a new on-line repairing method to meet the needs of railway transportation development.In this thesis,the technology and mechanism of abrasive belt grinding repairing method were studied on the basis of analyzing the existing on-line steel rail repairing technologies.In order to get the most suitable abrasive belt for on-line repairing of steel rails,the grinding efficiency and the durability of abrasive belts and the surface quality of steel rail after abrasive belt grinding were studied on the built abrasive belt grinding testbed,and based on this,the steel rail’s grinding mechanism of abrasive belt grinding was studied.The main contents are as follows:1)The testbed of fast-feeding planar grinding was built with the basic elements for on-line repairing of steel rails,and the abrasive belt’s technological experiments were conducted on the testbed.2)The mathematical model of the abrasive belt grinding depth was established based on Hertz contact theory and Preston’s equation,which provides guidance for the selection of steel rail material’s abrasive belt grinding process parameters.3)On the basis of the experiment of the abrasive belt’s durability and grinding efficiency,the surface morphology and surface roughness of the steel rail after abrasive belt grinding were studied,then the type of belt abrasive and the abrasive granularity was determined.4)The effects of the steel rail material belt grinding’s parameters on the grinding depth and tangential grinding force was studied based on the abrasive belt grinding technological experiments.In this paper,by the research on steel rail material abrasive belt grinding process,The capability of the steel rail abrasive belt grinding was fully proved,and the process parameters were determined.