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钢轨打磨用钎焊金刚石砂轮研究

浦一子 肖冰 高睿 王溯 周颢

浦一子, 肖冰, 高睿, 王溯, 周颢. 钢轨打磨用钎焊金刚石砂轮研究[J]. 金刚石与磨料磨具工程, 2022, 42(3): 325-331. doi: 10.13394/j.cnki.jgszz.2021.3004
引用本文: 浦一子, 肖冰, 高睿, 王溯, 周颢. 钢轨打磨用钎焊金刚石砂轮研究[J]. 金刚石与磨料磨具工程, 2022, 42(3): 325-331. doi: 10.13394/j.cnki.jgszz.2021.3004
PU Yizi, XIAO Bing, GAO Rui, WANG Su, ZHOU Hao. Study on brazed diamond grinding wheel for rail grinding[J]. Diamond &Abrasives Engineering, 2022, 42(3): 325-331. doi: 10.13394/j.cnki.jgszz.2021.3004
Citation: PU Yizi, XIAO Bing, GAO Rui, WANG Su, ZHOU Hao. Study on brazed diamond grinding wheel for rail grinding[J]. Diamond &Abrasives Engineering, 2022, 42(3): 325-331. doi: 10.13394/j.cnki.jgszz.2021.3004

钢轨打磨用钎焊金刚石砂轮研究

doi: 10.13394/j.cnki.jgszz.2021.3004
详细信息
    通讯作者:

    肖冰,男,1968年生,教授、博士生导师。主要研究方向:新型超硬工具制造技术,高效精密加工技术。E-mail: meebxiao@nuaa.edu.cn

  • 中图分类号: TG74;TG58

Study on brazed diamond grinding wheel for rail grinding

  • 摘要: 为解决传统树脂砂轮打磨钢轨时存在的打磨效率低、易烧伤钢轨和粉尘污染大等问题,分析利用钎焊金刚石技术的优势制备新型钢轨打磨用砂轮的可行性。结合磨粒有序排布工艺,制备具有开槽结构的新型钎焊金刚石砂轮,并对U71Mn钢轨钢进行打磨对比试验。结果表明:相较于树脂锆刚玉砂轮,新型钎焊金刚石砂轮能提高50%左右的打磨效率,并有效降低磨削温度,避免钢轨烧伤。在钢轨打磨过程中,新型钎焊砂轮排屑效果显著,基本不发生磨屑黏附现象;但砂轮开槽导致磨削振动增大,加剧金刚石磨粒破碎,并增大钢轨表面粗糙度。新型砂轮磨屑多为带状,磨屑体积大且无熔融小球。

     

  • 图  1  试验砂轮外观

    Figure  1.  Appearance of test grinding wheel

    图  2  钢轨打磨试验平台

    Figure  2.  Rail grinding test platform

    图  3  钎焊金刚石砂轮表面微观形貌

    Figure  3.  Surface micromorphology of brazed diamond grinding wheel

    图  4  打磨砂轮打磨效率对比图

    Figure  4.  Comparison of grinding efficiency of grinding wheels

    图  5  不同砂轮打磨后的钢轨表面微观形貌

    Figure  5.  Rail surface micro morphology after grinding with different grinding wheels

    图  6  砂轮C表面的金刚石磨粒磨损状态

    Figure  6.  Abrasive wear of grinding wheel C surface

    图  7  砂轮C上的磨粒磨损分布

    Figure  7.  Abrasive wear distribution of grinding wheel C

    图  8  砂轮B表面磨屑黏附状况

    Figure  8.  Debris adhesion on the surface of grinding wheel B

    图  9  磨屑形貌对比

    Figure  9.  Comparison of debris morphology

    表  1  砂轮相关参数

    Table  1.   Grinding wheel related parameters

    编号磨粒
    类型
    结合剂
    类型
    磨粒排布是否开槽
    A锆刚玉酚醛树脂多层无序
    B金刚石Ni–Cr钎料单层有序
    C金刚石Ni–Cr钎料单层有序
    下载: 导出CSV

    表  2  打磨参数

    Table  2.   Grinding parameters

    参数类型或取值
    砂轮转速 n /(r·min−13 000
    砂轮行进速度 v /(m·s−10.1
    打磨压力 F / N600
    磨削方式干式磨削
    下载: 导出CSV
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出版历程
  • 录用日期:  2022-03-02
  • 收稿日期:  2022-01-10
  • 修回日期:  2022-03-02

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