Research on grinding performance of micro-structured CVD diamond wheel for BK7 optical glass

Han Liu; Chunyu Zhang; Junwei Liu; Qingliang Zhao; Bing Guo

doi:10.1117/12.2604567

13 December 2021 Research on grinding performance of micro-structured CVD diamond wheel for BK7 optical glass

Han Liu, Chunyu Zhang, Junwei Liu, Qingliang Zhao, Bing Guo

Proceedings Volume 12071, 10th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing and Metrology Technologies; 120710M (2021) https://doi.org/10.1117/12.2604567
Event: Tenth International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2021), 2021, Chengdu, China

Abstract

BK7 optical glass is widely used as aerospace optical window. Precision grinding is a common method for machining BK7 optical elements. CVD diamond grinding wheel is a cutting tool with excellent wear resistance, which can realize high efficiency grinding for BK7. However, due to its small chip space, the surface quality will be affected by the large grinding force and difficult chip removal. In this paper, micro-grooves with different angles and widths were fabricated on CVD diamond grinding wheel surfaces by picosecond laser to improve the chip space. The grinding experiments of BK7 were carried out using these micro-structured wheels. The results show that the grinding force was reduced by 80% at most compared with the unstructured wheel, and the machined surface roughness was also decreased by up to 85%. The grinding force of structured CVD diamond grinding wheel decreases with the increase of the surface micro-structure groove angle. With the increase of groove width on the surface of structured CVD diamond grinding wheel, the surface roughness of the workpiece decreases first and then increases. When the groove width is 80μm, the surface roughness of the workpiece reaches the minimum value.

Citation Download Citation

Han Liu, Chunyu Zhang, Junwei Liu, Qingliang Zhao, and Bing Guo "Research on grinding performance of micro-structured CVD diamond wheel for BK7 optical glass", Proc. SPIE 12071, 10th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing and Metrology Technologies, 120710M (13 December 2021); https://doi.org/10.1117/12.2604567

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