YUAN Sheng-hao,ZHANG Yun-fei,YU Jia-xin,et al.Formation and evolution behavior of comet-tail defects in magnetorheological finishing[J].Optics and Precision Engineering,2021,29(04):740-748.
YUAN Sheng-hao,ZHANG Yun-fei,YU Jia-xin,et al.Formation and evolution behavior of comet-tail defects in magnetorheological finishing[J].Optics and Precision Engineering,2021,29(04):740-748. DOI: 10.37188/OPE.2020.0499.
Formation and evolution behavior of comet-tail defects in magnetorheological finishing
To investigate generation and evolution mechanisms of “comet-tail defects” on surfaces of components after magnetorheological finishing (MRF), a self-developed MRF machine was used to analyze the effects of concentration and moisture content of MR fluid particles on comet-tail defects in MRF, using fused silica glass as a sample. Extant studies show that comet-tail defects are generated following initial defects on component surfaces. Moreover, the accumulation of particles at these initial defects is the main reason for their evolution into comet-tail defects. Increases in the concentration of polishing particles lead to evident accumulation of particles at initial defects, and more comet-tail defects emerge resultantly. However, fluidity is strengthened with increases in the moisture content, thereby resulting in a decreased number of comet-tail defects. With increases in processing times, initial craters evolve into comet-tail defects At this point, the crater depth at the head of the comet-tail initially increases and then decreases when compared to initial defects. Similarly, increases in processing times monotonically increase the crater edge angle until the defects are completely removed. Hence, the results of this study establish a theoretical foundation for restricting the formation of comet-tail defects on surfaces of components in MRF and facilitate subsequent development of MR fluids and process optimization methods to control the generation of comet-tail defects.
关键词
Keywords
references
MOSES E I . The National Ignition Facility: the world's largest laser system for high energy density and inertial confinement fusion science [C]. Conference on Lasers and Electro⁃Optics , 2004 . (CLEO). May 16 - 21 , 2004, San Francisco, CA, USA. IEEE , 2004 ( 1 ): 2 .
GUO Y B , PENG Y F , WANG ZH ZH , et al . Development and application of precision grinding/polishing and measurement equipment for large-size optical components [J]. Aeronautical Manufacturing Gechnology , 2018 , 61 ( 6 ): 26 - 35 . (in Chinese)
JIANG X E , LIU W W , WANG B , et al . Study of enhancement effects of surface cracks on light intensity distribution at optical glass surfaces [J]. Applied Laser , 2016 , 36 ( 5 ): 621 - 626 . (in Chinese)
WANG H X , SHEN L , LI CH F , et al . Analysis and experimental investigation of laser induced damage of optics [J]. Chinese Journal of Lasers , 2017 ( 3 ): 98 - 104 . (in Chinese)
YANG F X . Study on the technology of the ultra precision machining for the large-aperture optical flats [J]. Optical Technique , 2004 , 30 ( 1 ): 27 - 29 . (in Chinese)
LIU H J , WANG F R , GENG F , et al .. Nondestructive detection of optics subsurface defects by fluorescence image technique [J]. Optics and Precision Engineering , 2020 , 28 ( 1 ): 50 - 59 . (in Chinese)
SHI F , DAI Y F , PENG X Q , et al .. Removal of subsurface damage in grinding by magnetorheological finishing [J]. Optics and Precision Engineering , 2010 , 18 ( 1 ): 162 - 168 . (in Chinese)
ZHAO Z Y , HE J G , ZHANG Y F , et al .. Evaluation and removal of subsurface damage in polished fused silica by magnetorheological finishing [J]. Laser Journal , 2017 , 38 ( 7 ): 13 - 16 . (in Chinese)
HAI K , HAI K , LI L X , et al .. Distribution model of the surface roughness in magnetorheological jet polishing [J]. Applied Optics , 2020 , 59 ( 28 ): 8740 - 8750 .
GUO ZH D , WANG X H , YANG ZH Q , et al .. Influence of plasticity on comet tail phenomenon in magnetorheological finishing [J]. Journal of Xi'an Technological University , 2010 , 30 ( 2 ): 112 - 116 . (in Chinese)
CATRIN R , NEAUPORT J , TAROUX D , et al .. Magnetorheological finishing for removing surface and subsurface defects of fused silica optics [J]. Optical Engineering , 2014 , 53 ( 9 ): 092010 .
LI X Y , YE M H , LIU J B , et al .. Influence of pH value on removal effect of fused silica during magnetorheological finishing [J]. Optics and Precision Engineering , 2019 , 27 ( 12 ): 2602 - 2608 . (in Chinese)
PFIFFER M , LONGUET J L , LABRUGÈRE C , et al .. Characterization of the polishing-induced contamination of fused silica optics [J]. Journal of the American Ceramic Society , 2017 , 100 ( 1 ): 96 - 107 .
HAI K . Study on Polishing Principle and Expriments of Magnetorheological Jet Polishing [D]. Changchun : Changchun Institute of Optics , Fine Mechanics and Physics , University of Chinese Academy of Sciences , 2020 . (in Chinese)
KIRK N B , WOOD J V . The effect of the calcination process on the crystallite shape of Sol-gel cerium oxide used for glass polishing [J]. Journal of Materials Science , 1995 , 30 ( 8 ): 2171 - 2175 .
YANG H , LIU X Y , MA D Q , et al .. Fluid dynamics analysis method for MRF of first order discontinuous optical elements [J]. High Power Laser and Particle Beams , 2019 , 31 ( 2 ): 29 - 35 . (in Chinese)