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不同磨损砂轮磨削的石英玻璃亚表面裂纹分布特征

Distribution Characteristics of Sub-Surface Cracks in Fused Quartz Ground with Different Worn Wheels.

作者信息

Zhao Bingyao, Wang Yonghao, Yan Ying, Wang Kai, Zhou Ping

机构信息

Key Laboratory for Precision and Non-Traditional Machining Technology of Ministry of Education, Dalian University of Technology, Dalian 116024, China.

出版信息

Materials (Basel). 2022 Mar 26;15(7):2443. doi: 10.3390/ma15072443.

DOI:10.3390/ma15072443
PMID:35407776
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8999835/
Abstract

The crack distribution characteristics in grinding damage have a significant impact on subsequent polishing efficiency and part strength. Grinding tests were carried out on fused quartz using grinding wheels with different wear states. The results showed that the cracks produced by sharp abrasive grits were mainly near chevron cracks and had no preferred direction. However, the blunt abrasive grits produced near partial cone cracks had a preferred direction. At a depth of 96.7 μm from the surface, the amount of cracks in the range of 50°~90° with an inclination angle between the crack and the cutting direction could reach 88.9%. The statistical results showed that the depth and total length of cracks produced by sharp grits were larger than those produced by blunt grits (the maximum crack depth difference was about 40 μm). Therefore, it was concluded that sharp abrasive grits were not conducive to damage control. The findings of this research enhance our understanding of the formation mechanism of grinding damage.

摘要

磨削损伤中的裂纹分布特征对后续的抛光效率和零件强度有显著影响。使用具有不同磨损状态的砂轮对熔融石英进行了磨削试验。结果表明，尖锐磨粒产生的裂纹主要靠近人字形裂纹，且无择优取向。然而，钝磨粒产生的裂纹靠近部分锥形裂纹，且有择优取向。在距表面96.7μm深处，裂纹与切削方向夹角在50°~90°范围内的裂纹数量可达88.9%。统计结果表明，尖锐磨粒产生的裂纹深度和总长度大于钝磨粒产生的裂纹深度和总长度（最大裂纹深度差约为40μm）。因此，得出结论：尖锐磨粒不利于损伤控制。本研究结果加深了我们对磨削损伤形成机制的理解。

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本文引用的文献

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Subsurface damage in precision ground ULE(R) and Zerodur(R) surfaces.
Opt Express. 2007 Sep 17;15(19):12197-205. doi: 10.1364/oe.15.012197.