纵扭超声磨削ZrO<sub>2</sub>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

纵扭超声磨削ZrO₂陶瓷表面形貌及粗糙度特征研究

马文举^1,,
薛进学^1, ,,
隆志力²,
杨宇辉^{2, 3},
赵恒²,
胡广豪¹

1.
河南科技大学机电工程学院, 河南洛阳 471003
2.
哈尔滨工业大学(深圳) 机电工程与自动化学院, 广东深圳 518055
3.
东莞理工学院机械工程学院, 广东东莞 523808

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
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- 文章访问数: 208
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- 被引次数: 0
出版历程
- 收稿日期: 2020-03-03
- 刊出日期: 2021-07-01

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

MA Wenju^1
,,
XUE Jinxue^{1
, ,},
LONG Zhili²,
YANG Yuhui^{2, 3},
ZHAO Heng²,
HU Guanghao¹

1.
School of Mechatronics Engineering, Henan University of Science and Technology, Luoyang 471003, He′nan, China
2.
School of Mechanical Engineering and Automation, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, Guangdong, China
3.
School of Mechanical Engineering, Dongguan University of Technology, Dongguan 523808, Guangdong, China

摘要

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R_a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R_a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R_a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R_a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。
- ZrO₂陶瓷 /
- 纵扭超声磨削(LTUG) /
- 表面粗糙度 /
- 微观形貌 /
- 工艺参数
Abstract: As a typical hard-brittle material, ZrO₂ ceramics is difficult to obtain good surface quality with ordinary grinding methods. However, ultrasonic vibration grinding can significantly improve its machining effect. In this paper, longitudinal torsion ultrasonic vibration is applied to grinding, and the comparison test of the ordinary grinding (OG) with the longitudinal torsion ultrasonic grinding (LTUG) was designed with single factor method. The surface roughness R_a value and microstructure of processed materials were used as evaluation indexes. The influence law of each technological parameter on the surface quality is analyzed and obtained. The result shows that the surface R_a value via LTUG was always lower than that via OG, and the grinding surface was more uniform and smooth; comparing with OG, R_a value via LTUG decreases firstly and then increases with the increasing of ultrasonic energy, and at the same time, they both decrease firstly and then increase with the increasing of grinding depth, and decrease gradually with the increasing of spindle speed; in addition, the surface R_a value via OG increases firstly and then decreases with the increasing of feed speed, while the LTUG increases continuously and gradually approaches OG.
- ZrO₂ ceramics /
- longitudinal torsional ultrasonic grinding(LTUG) /
- surface roughness /
- microstructures /
- processing parameters

HTML全文

图 1 磨削试验设备及原理图

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图 2 LTUG加工示意图

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图 3 Q对R_a值的影响

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图 4 不同Q参数磨削表面形貌

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图 5 Q为60%时磨削表面形貌

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图 6 a_p对R_a值的影响

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图 7 脆塑性组合去除表面形貌

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图 8 较大a_p时表面形貌(a_p=14 μm)

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图 9 n对R_a值的影响

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图 10 不同n参数的磨削表面形貌

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图 11 V_f对R_a值的影响

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图 12 不同V_f参数的磨削表面形貌

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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H_V/GPa	11.5
弯曲强度σ/MPa	120 0
断裂韧性K_IC/(MPa·m^1/2)	9.0
弹性模量E/GPa	>200
泊松比υ	0.22~0.23

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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%

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表 3 单因素工艺试验参数

试验组数	Q/%	a_p/μm	n/(r·min^-1)	V_f /(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

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