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纵扭超声磨削ZrO2陶瓷表面形貌及粗糙度特征研究

马文举 薛进学 隆志力 杨宇辉 赵恒 胡广豪

马文举, 薛进学, 隆志力, 杨宇辉, 赵恒, 胡广豪. 纵扭超声磨削ZrO2陶瓷表面形貌及粗糙度特征研究[J]. 机械科学与技术, 2021, 40(7): 1058-1064.
引用本文: 马文举, 薛进学, 隆志力, 杨宇辉, 赵恒, 胡广豪. 纵扭超声磨削ZrO2陶瓷表面形貌及粗糙度特征研究[J]. 机械科学与技术, 2021, 40(7): 1058-1064.
MA Wenju, XUE Jinxue, LONG Zhili, YANG Yuhui, ZHAO Heng, HU Guanghao. Study on Surface Morphology and Roughness Characteristics of ZrO2 Ceramics Longitudinal Torsional Ultrasonic Grinding[J]. Mechanical Science and Technology for Aerospace Engineering, 2021, 40(7): 1058-1064.
Citation: MA Wenju, XUE Jinxue, LONG Zhili, YANG Yuhui, ZHAO Heng, HU Guanghao. Study on Surface Morphology and Roughness Characteristics of ZrO2 Ceramics Longitudinal Torsional Ultrasonic Grinding[J]. Mechanical Science and Technology for Aerospace Engineering, 2021, 40(7): 1058-1064.

纵扭超声磨削ZrO2陶瓷表面形貌及粗糙度特征研究

基金项目: 

国家自然科学基金项目 U1713206

深圳市学科布局基础研究项目 JCYJ20170413112645981

深圳市学科布局基础研究项目 JCYJ20150928162432701

详细信息
    作者简介:

    马文举(1992-), 硕士研究生, 研究方向为超声辅助精密加工, mawenju126@foxmail.com

    通讯作者:

    薛进学, 副教授, 硕士生导师, xjx19652000@163.com

  • 中图分类号: TG506.5;TG580.6

Study on Surface Morphology and Roughness Characteristics of ZrO2 Ceramics Longitudinal Torsional Ultrasonic Grinding

  • 摘要: ZrO2陶瓷作为典型硬脆材料, 采用普通的磨削方法难以获得良好表面质量, 而超声振动磨削可显著改善其加工效果。本文将纵扭超声振动应用于磨削加工, 运用单因素法, 设计普通磨削(OG)及纵扭超声磨削(LTUG)对比试验, 以加工后材料表面粗糙度Ra值和微观形貌作为评价指标, 分析并得到各工艺参数对表面质量的影响规律。结果表明: 整体上LTUG表面Ra值始终低于OG, 且磨削表面平整, 磨痕形貌更加均匀、顺畅; 相比于OG, 随超声能量增大, LTUG表面Ra值呈先减小后增大趋势, 同时均随磨削深度加深先减小后增大, 随主轴转速提高均逐渐降低; 另外, OG表面Ra值随进给速度提升先增大后减小, 而LTUG为持续增大并逐渐趋向OG。
  • 图  1  磨削试验设备及原理图

    图  2  LTUG加工示意图

    图  3  QRa值的影响

    图  4  不同Q参数磨削表面形貌

    图  5  Q为60%时磨削表面形貌

    图  6  apRa值的影响

    图  7  脆塑性组合去除表面形貌

    图  8  较大ap时表面形貌(ap=14 μm)

    图  9  nRa值的影响

    图  10  不同n参数的磨削表面形貌

    图  11  VfRa值的影响

    图  12  不同Vf参数的磨削表面形貌

    表  1  ZrO2陶瓷主要力学性能参数

    参数名称 数值
    密度ρ/(g·cm-3) >5.5
    硬度HV/GPa 11.5
    弯曲强度σ/MPa 120 0
    断裂韧性KIC/(MPa·m1/2) 9.0
    弹性模量E/GPa >200
    泊松比υ 0.22~0.23
    下载: 导出CSV

    表  2  加工工艺条件

    试验参数 设置条件
    磨削方式 平面单向直线磨削(空转回刀)
    超声振动方向 轴向方向(纵振)绕主轴旋转方向(扭振)
    超声振动条件 超声频率范围20~30 kHz, 振幅0~10 μm可调
    纵扭转换比 约为25%
    下载: 导出CSV

    表  3  单因素工艺试验参数

    试验组数 Q/% ap/μm n/(r·min-1) Vf /(mm·min-1)
    1 60 10 16 000, 18 000, 20 000, 22 000, 24 000 100
    2 60 6, 8, 10, 12, 14 20 000 100
    3 60 10 20 000 60, 80, 100, 120, 140
    4 0, 20, 30, 40, 50, 60, 70, 80 10 20 000 100
    下载: 导出CSV
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  • 收稿日期:  2020-03-03
  • 刊出日期:  2021-07-01

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