轨廓在线仿形铣削特性对轮轨接触应力的影响研究  

Influence of Online Rail Profile Milling Characteristics on Wheel-rail Contact Stress

作　　者：罗亚南 郭关柱 杨国涛 LUO Yanan;GUO Guanzhu;YANG Guotao(College of Mechanical and Electrical Engineering,Yunnan Agricultural University,Kunming 650201,China;National Railway Large-Scale Maintenance Machinery Engineering Technology Research Center,Kunming 650215,China;Department of Science,Technology and Information Technology,China State Railway Group Co.,Ltd.,Beijing 100844,China)

机构地区：[1]云南农业大学机电工程学院,云南昆明650201 [2]国家铁路大型养路机械工程技术研究中心,云南昆明650215 [3]中国国家铁路集团有限公司科技与信息化部,北京100844

出　　处：《铁道学报》2022年第10期82-87,共6页Journal of the China Railway Society

基　　金：中国铁建股份有限公司科研计划(17-C47);云南省产业技术领军人才专项(YNWR-CYJS-2018-050)。

摘　　要：基于轨廓在线仿形铣削原理,建立不同铣削速度和铣削深度下,铣削残余波纹的波长、波高、廓形偏差等铣削特征参数的计算模型,开展铣削特征参数理论计算及轨廓在线仿形铣削试验,证实理论计算与试验结果基本吻合。利用轨廓在线仿形铣削特征参数,进行轮轨接触应力仿真分析。研究表明,直径800 mm铣盘的铣削移动速度为300~1 000 m/h时,铣削后残余波长为3~12 mm,残余波高为0.01~0.03 mm,轮轨接触区域最大廓形偏差为±(0.11~0.19) mm;轴重为14、19、23 t时,铣削后轨顶面受到的最大轮轨接触Von Miss等效应力分别为1 002、1 079、1 139 MPa,超过理想标准轨廓相应受到的最大轮轨接触Von Miss等效应力为126、85、65 MPa。轨廓在线仿形铣削优选特征参数为铣削速度为600 m/h和铣削深度为0.4 mm。Based on the principle of online rail profiling milling, the calculation model of milling characteristic parameters such as wavelength, wave height and rail profile deviation of the milling residual ripple at different milling speeds and milling depths was established. The theoretical calculation of the milling characteristic parameters and the online profiling milling experiment of the rail profile confirmed the consistency between the theoretical calculations values and the experimental results. Using the characteristic parameters of online rail profiling milling, a simulation analysis of wheel-rail contact stress was carried out. The results show that, when the milling disc with a diameter of 800 mm moves at a milling speed of 300~1 000 m/h, the residual wavelength, residual wave height and maximum profile deviation in the wheel-rail contact of rail profile after milling are 3~12 mm, 0.01~0.03 mm and ±(0.11~0.19) mm respectively. When the axle load of the wheel is 14, 19, or 23 tons, the maximum wheel-rail contact Von Miss equivalent stress on the top surface of the rail after milling is 1 002, 1 079, or 1 139 MPa, respectively. The corresponding maximum wheel-rail contact Von Miss equivalent stress exceeding the ideal standard rail profile is 126, 85, and 65 MPa. The optimal characteristic parameters for online profiling milling rail are the milling speed of 600 m/h and the milling depth of 0.4 mm.

关 键 词：在线仿形铣削 轮轨接触应力 铣削残余波长 铣削残余波高 理想标准轨廓 

分 类 号：U216.63[交通运输工程—道路与铁道工程]