Research Progresses and Prospect of Rail Grinding Mechanism

Abstract

Abstract: The papar reviewed the material removal mechanism including material removal model and temperature field. After that, the removal behaviours under different grinding parameters, grinding stones and grinding conditions were introduced, respectively. Besides, the interaction mechanism between grinding efficiency and quality was put forward. Moreover, the influences of rail grinding on the wheel/rail rolling contact fatigue were concluded. It is suggested that the researches of the properties of grinding stones, such as abrasive composition, binder, granularity， hardness and blowhole, should be conducted to develop suitable grinding stones for China. This may reduce the grinding costs, and improve the grinding efficiency and quality. Moreover, it is necessary to further conduct experimental researches under special conditions. It is noteworthy that rail grinding should be combined with other railway maintenances to improve the rail service life and ensure a good wheel/rail contact conditions.

Key words: rail grinding, contact fatigue, material removal, temperature field, grinding quality

摘要： 综述了钢轨打磨过程中材料的去除机理，主要包括钢轨打磨时材料的去除模型、钢轨打磨温度场，并在此基础上介绍了不同打磨参数、打磨磨石与打磨工况下钢轨材料的去除行为，提出了钢轨打磨效率和打磨质量相互作用机制，总结了钢轨打磨对轮轨滚动接触疲劳的影响因素。提出了未来重点研究方向建议：开展针对磨石特性（如磨料成分、结合剂、粒度、硬度、气孔等）的研究，研发适合我国钢轨的打磨磨石，以提高打磨作业效率和质量，降低打磨作业成本；进一步开展其他特殊工况下的钢轨打磨试验；将钢轨打磨与其他铁路维护作业相结合，在保证轮轨接触状态良好的条件下延长钢轨使用寿命。

关键词: 钢轨打磨, 接触疲劳, 材料去除, 温度场, 打磨质量

CLC Number:

U216.414

ZHOU Kun, WANG Wenjian, LIU Qiyue, GUO Jun. Research Progresses and Prospect of Rail Grinding Mechanism[J]. China Mechanical Engineering.

周坤, 王文健, 刘启跃, 郭俊. [表面强化及损伤机理]钢轨打磨机理研究进展及展望[J]. 中国机械工程.

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