• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2018, Vol. 54 ›› Issue (4): 30-36.doi: 10.3901/JME.2018.04.030

• 轮轨磨耗 • 上一篇    下一篇

基于虚拟砂轮建模的钢轨打磨材料去除仿真研究

商维, 张沭玥, 郭俊, 刘启跃, 王文健   

  1. 西南交通大学牵引动力国家重点实验室摩擦学研究所 成都 610031
  • 收稿日期:2017-04-06 修回日期:2017-12-29 出版日期:2018-02-20 发布日期:2018-02-20
  • 通讯作者: 王文健(通信作者),男,1980年出生,博士,研究员,博士研究生导师。主要研究方向为轮轨服役行为及科学维护技术。E-mail:wwj527@163.com
  • 作者简介:商维,男,1992年出生。主要研究方向为钢轨打磨材料去除行为。E-mail:sw920908@163.com
  • 基金资助:
    国家自然科学基金(51575460)和四川省青年科技创新研究团队(2017TD0017)资助项目

Simulation Study on Material Removal of Rail Grinding Based on Virtual Grinding Wheel Modeling

SHANG Wei, ZHANG Shuyue, GUO Jun, LIU Qiyue, WANG Wenjian   

  1. Tribology Research Institute, State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031
  • Received:2017-04-06 Revised:2017-12-29 Online:2018-02-20 Published:2018-02-20

摘要: 通过对实际砂轮表面形貌的测量分析,获得砂轮磨粒面密度和突出高度的分布规律,基于虚拟格子法建立砂轮磨粒位置随机分布、突出高度服从正态分布的虚拟砂轮模型,进而建立钢轨打磨的三维仿真模型。仿真分析不同打磨转速对打磨磨削力、去除量、表面粗糙度及打磨表面形貌的影响。利用钢轨打磨摩擦试验机开展了钢轨打磨试验,试验结果与仿真结果进行了对比。结果表明:打磨转速增加时,钢轨磨削力呈小幅度减小,打磨去除量明显增大;钢轨表面粗糙度随打磨转速的增加而减小,随打磨深度的增加而增大;打磨后钢轨表面呈现多条犁沟和区域性的材料隆起;仿真与试验结果具有较好的一致性,验证了所建立的仿真模型预测钢轨打磨材料去除行为的可靠性。

关键词: 表面粗糙度, 表面形貌, 钢轨打磨, 磨削力, 去除量

Abstract: By means of the measurement and analysis of the actual grinding wheel surface topography, the density and height distribution of abrasive grains are obtained. Based on the virtual grid method, a virtual grinding wheel model is built, which the abrasive grains are randomly distributed and height is normally distributed. Furthermore, a 3D simulation model of rail grinding is established. The influence of different grinding rotational speed on grinding force, removal amount, surface roughness, grinding surface topography are simulated and explored. The rail grinding experiments are carried out by means of a rail grinding friction machine and the testing results are compared with the simulation results. The results show that the grinding force slightly decreases and the removal amount obviously increases with the grinding rotational speed increasing. The surface roughness decreases with the increasing of grinding rotational speed, but increases with the increasing of grinding depth. The surface of grinding rail exhibits many ploughing and regional material uplift. The simulation results are consistent with experimental results, which verify the reliability of simulating model for calculating the materials removal of rail grinding.

Key words: grinding force, rail grinding, removal amount, surface roughness, surface topography

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