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基于切削技术的金刚石刀具磨损特征分析

史燕

史燕. 基于切削技术的金刚石刀具磨损特征分析[J]. 金刚石与磨料磨具工程, 2022, 42(1): 112-118. doi: 10.13394/j.cnki.jgszz.2021.0093
引用本文: 史燕. 基于切削技术的金刚石刀具磨损特征分析[J]. 金刚石与磨料磨具工程, 2022, 42(1): 112-118. doi: 10.13394/j.cnki.jgszz.2021.0093
SHI Yan. Analysis on wear characteristics of diamond tools based on cutting technology[J]. Diamond &Abrasives Engineering, 2022, 42(1): 112-118. doi: 10.13394/j.cnki.jgszz.2021.0093
Citation: SHI Yan. Analysis on wear characteristics of diamond tools based on cutting technology[J]. Diamond &Abrasives Engineering, 2022, 42(1): 112-118. doi: 10.13394/j.cnki.jgszz.2021.0093

基于切削技术的金刚石刀具磨损特征分析

doi: 10.13394/j.cnki.jgszz.2021.0093
详细信息
    作者简介:

    史燕,女,1988年生,硕士、讲师。主要研究方向:机械工程。E-mail: shiyan12s@163.com

  • 中图分类号: TG58;TG501

Analysis on wear characteristics of diamond tools based on cutting technology

  • 摘要: 金刚石刀具的磨损情况决定其使用寿命。用金刚石PCD刀具切削6061-T6镁铝合金工件,通过不同切削速度、切削深度、振动频率、刀具后角时的切削力及切削温度变化,研究不同刀具前后角、进给量、切削转速时的工件表面粗糙度及刀具磨损面积。结果表明:金刚石刀具的切削力和切削温度随切削速度、切削深度的增加而增大,随振动频率的增加而减小;刀具后角增大,金刚石刀具的切削力呈先下降而后缓缓上升趋势,但对切削温度的影响很小。当刀具前角为10°,刀具后角为8°,切削速度为0.46 m/s,切削深度为28 μm,进给量为0.10 mm/r,切削转速为4100 r/min,振动频率为22 kHz,切削振幅为9 μm时,金刚石刀具的磨损面积最小,磨损程度最低,使用寿命最长,但工件的表面粗糙度稍高。

     

  • 图  1  德国斯宾纳PD-CNC双主轴超精密车床

    Figure  1.  Germany Spinner PD-CNC double spindle ultra precision lathe

    图  2  金刚石刀具简图

    Figure  2.  Sketch of diamond cutter

    图  3  不同刀具后角时的切削力变化

    Figure  3.  Variation of cutting forces at different tool back angles

    图  4  不同刀具后角时的切削温度变化

    Figure  4.  Variation of cutting temperatures at different tool back angles

    图  5  不同切削速度时切削力变化

    Figure  5.  Cutting force changes at different cutting speeds

    图  6  不同切削速度时的切削温度变化

    Figure  6.  Cutting temperature changes at different cutting speeds

    图  7  不同切削深度时切削力变化

    Figure  7.  Cutting force changes at different cutting depths

    图  8  不同切削深度时的切削温度变化

    Figure  8.  Cutting temperature changes at different cutting depths

    图  9  不同振动频率时的切削力变化

    Figure  9.  Cutting force changes at different vibration frequencies

    图  10  不同振动频率时的切削温度变化

    Figure  10.  Cutting temperature changes at different vibration frequencies

    表  1  金刚石刀具与工件的物理参数

    Table  1.   Physical parameters of diamond tool and workpiece

    物理参数镁铝合金工件金刚石刀具
    材料密度 ρ / (kg·m−3)7 7803 410
    泊松比 ε0.30.1
    弹性模量 E / GPa2071 045
    比热 c / [J·(kg·℃)−1]501415
    热导率 λ / [W·(m·K)−1]43.4980.0
    热膨胀系数 α / K−11.29×10−51.25×10−6
    下载: 导出CSV

    表  2  影响刀具切削的参数

    Table  2.   Parameters affecting tool cutting

    参数取值
    刀具前角 α / (°)3,4,5,6,7,8,9,10
    刀具后角 β / (°)4,5,6,7,8,9,10,11
    切削速度 v / (m·s−1)0.34,0.38,0.42,0.46,0.50,0.54,0.58,0.62
    切削深度 ap / μm4,8,12,16,20,24,28,32
    进给量 vf / (mm·r−1)0.03,0.04,0.05,0.06,0.07,0.08,0.09,0.10
    切削转速 n / (r·min−1)2 000,2 300,2 600,2 900,3 200,3 500,3 800,4 100
    超声频率 f / kHz15,16,17,18,19,20,21,22
    超声振幅 A / μm9
    下载: 导出CSV

    表  3  工件表面粗糙度及刀具表面磨损面积变化

    Table  3.   Workpiece surface roughness and tool surface wear area changes

    刀具前角
    α / (°)
    表面粗糙度
    Ra / nm
    磨损面积
    S / mm2
    转速
    n / (r·min−1)
    表面粗糙度
    Ra / nm
    磨损面积
    S / mm2
    进给量
    vf / (mm·r−1)
    表面粗糙度
    Ra / nm
    磨损面积
    S / mm2
    321.340.76 × 10−32 00025.610.85 × 10−30.0321.240.73 × 10−3
    421.730.77 × 10−32 30023.260.79 × 10−30.0423.640.71 × 10−3
    522.610.79 × 10−32 60022.430.77 × 10−30.0524.850.69 × 10−3
    622.810.81 × 10−32 90021.860.74 × 10−30.0626.240.68 × 10−3
    723.640.82 × 10−33 20024.620.71 × 10−30.0727.840.67 × 10−3
    826.490.76 × 10−33 50026.430.68 × 10−30.0827.860.65 × 10−3
    928.610.64 × 10−33 80028.680.64 × 10−30.0927.880.64 × 10−3
    1029.580.52 × 10−34 10029.630.62 × 10−30.1027.910.62 × 10−3
    下载: 导出CSV
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  • 录用日期:  2021-12-08
  • 收稿日期:  2021-05-16
  • 修回日期:  2021-09-07

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