反应诱导浆料辅助磨削光学玻璃透镜的浆料条件

Tappei Kawasato, Hinata Takamaru, Kazuhisa Hamazono, M. Fukuta, Katsuto Tanaka, Yusuke Chiba, Mikinori Nagano, Hidebumi Kato, Y. Kakinuma
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引用次数: 0

摘要

由于图像分辨率的提高,光学玻璃透镜的需求正在上升。光学玻璃是一种又硬又脆的材料。因此,为了提高光学玻璃的透镜质量和生产率,需要一种高效、精确的磨削方法。有几种方法可以产生无裂纹的加工表面;然而,它们只能提供有限的磨削效率。为了解决这个问题,作者小组提出了反应诱导浆料辅助(RISA)研磨方法,该方法利用氧化铈浆料的化学-机械作用扩大了延性研磨的范围。在本研究中,实验评估了不同pH水平下RISA研磨的研磨性能。使用Tukey的测试对结果进行比较,其中表面粗糙度作为特征值,pH值作为分析因素。结果表明,当料浆为碱性时,RISA研磨可有效地获得高质量的表面。在RISA磨削中,氧化铈磨料与砂轮的粘附遵循与料浆聚集相同的机理。此外,当浆料的碱化促进团聚时,粘连更容易发生。浆料供应单元中的储罐被替换为旋转储罐,以确保稳定的RISA研磨具有高聚合性的浆料,同时防止聚集。性能评价表明,在大多数零件中获得了表面粗糙度小于10 nm的高质量表面。临界切割深度稳定地增加了5.8倍。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Slurry Conditions for Reaction-Induced Slurry-Assisted Grinding of Optical Glass Lens
The demand for optical glass lenses is rising owing to the increase in image resolution. Optical glass is a hard and brittle material. Thus, an efficient and precise grinding method is required for optical glass to improve lens quality and productivity. There are a few methods of producing crack-free machined surfaces; however, they provide only limited grinding efficiency. To resolve this issue, the authors’ group has proposed the reaction-induced slurry-assisted (RISA) grinding method, which expands the range of ductile-regime grinding by utilizing the chemical–mechanical action of a cerium oxide slurry. In this study, the grinding performance of RISA grinding is experimentally evaluated for different pH levels. The results are compared using Tukey’s test, where surface roughness is considered as the characteristic value and the pH value as the analyzed factor. The result shows that RISA grinding efficiently produces a high-quality surface when the slurry is alkaline. The adhesion of cerium oxide abrasives to the wheel in RISA grinding follows the same mechanism as slurry aggregation. In addition, adhesion is more likely to occur when the alkalization of the slurry promotes aggregation. The tank in the slurry supply unit is replaced with a rotating tank to ensure stable RISA grinding with a highly aggregable slurry while preventing aggregation. The performance evaluation shows that a high-quality surface with a surface roughness of less than 10 nm in most parts is obtained. Moreover, the critical depth of cut stably increases by a factor of 5.8.
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