| 引用本文: | 彭文强,关朝亮,胡旭东,等.流体动压超光滑加工关键工艺参数优化.[J].国防科技大学学报,2017,39(4):179-184.[点击复制] |
| PENG Wenqiang,GUAN Chaoliang,HU Xudong,et al.Key process parameters optimization of hydrodynamic effect polishing[J].Journal of National University of Defense Technology,2017,39(4):179-184[点击复制] |
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| 流体动压超光滑加工关键工艺参数优化 |
| 彭文强1, 关朝亮2, 胡旭东1, 王卓2 |
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(1. 国防科技大学 指挥军官基础教育学院， 湖南 长沙 410073;2. 国防科技大学 机电工程与自动化学院， 湖南 长沙 410073)
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| 摘要: |
| 流体动压超光滑加工材料去除主要受工件表面流体动压和剪切分布的影响，根据材料去除的理论模型分析了影响材料去除的关键工艺参数。基于流体动力学仿真和具体实验对抛光轮浸没深度、抛光轮转速和抛光轮间隙对流体动压超光滑加工的材料去除速率的影响规律进行了研究。分析结果表明：抛光轮的浸没深度对材料去除速率影响不大；材料去除速率随着抛光轮转速的减小、抛光间隙的增大而减小；考虑实际使用条件，最优抛光轮转速为300 r/min、抛光间隙为25 μm、抛光轮浸没深度为（2/3）R。同时对抛光头温度稳定性进行了具体实验测试，其在装置启动后4 h基本达到热平衡，通过试运行预热的方式可有效避免温升变化对抛光间隙的影响。 |
| 关键词: 流体动压超光滑加工 工艺参数 材料去除速率 稳定性 |
| DOI：10.11887/j.cn.201704028 |
| 投稿日期：2016-02-29 |
| 基金项目:国家自然科学基金资助项目（61505259） |
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| Key process parameters optimization of hydrodynamic effect polishing |
| PENG Wenqiang1, GUAN Chaoliang2, HU Xudong1, WANG Zhuo2 |
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(1. College of Basic Education, National University of Defense Technology, Changsha 410073, China;2. College of Mechatronics Engineering and Automation, National University of Defense Technology, Changsha 410073, China)
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| Abstract: |
| The material removal rate of HEP (hydrodynamic effect polishing) was mainly affected by the distribution of hydrodynamic pressure and shear stress on the workpiece surface, and the key process parameters were sought out accordingly. Based on the fluid dynamic simulation and experiment exploration, it investigated in detail how the material removal rate was affected by the wheel immersed depth, the wheel rotated speed and the polishing clearance. The analysis results show that the wheel immersed depth has little effect on the removal rate while the removal rate decreases along with the reduction of the speed and the increase of the polishing clearance. Considering the practical process condition, the optimal wheel immersed depth, speed and polishing clearance are （2/3）R, 300 r/min and 25 μm respectively. Meanwhile, the temperature stability of the polishing head was monitored, and it reached thermal equilibrium within 4 hours at start of the device. Therefore the stability of polishing clearance affected by the temperature can be guaranteed by idling with preheating section. |
| Keywords: hydrodynamic effect polishing process parameters material removal rate stability |
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