scholarly journals Methods for improving the damage performance of fused silica polished by magnetorheological finishing

2017 ◽  
Author(s):  
Christopher A. Hall ◽  
Kyle R. P. Kafka ◽  
Semyon Papernov ◽  
Michael A. DeMarco ◽  
Kenneth L. Marshall ◽  
...  
Keyword(s):  
Fused Silica ◽  
Magnetorheological Finishing

scholarly journals Surface Roughness Tuning at Sub-Nanometer Level by Considering the Normal Stress Field in Magnetorheological Finishing

Micromachines ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 997
Author(s):  
Xiaoyuan Li ◽  
Qikai Li ◽  
Zuoyan Ye ◽  
Yunfei Zhang ◽  
Minheng Ye ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Shear Stress ◽  
Stress Field ◽  
Normal Stress ◽  
Fused Silica ◽  
Fine Tuning ◽  
Magnetorheological Finishing ◽  
Optical Surfaces ◽  
The Impact ◽  
The Relationship

Although magnetorheological finishing (MRF) is being widely utilized to achieve ultra-smooth optical surfaces, the mechanisms for obtaining such extremely low roughness after the MRF process are not fully understood, especially the impact of finishing stresses. Herein we carefully investigated the relationship between the stresses and surface roughness. Normal stress shows stronger impacts on the surface roughness of fused silica (FS) when compared with the shear stress. In addition, normal stress in the polishing zone was found to be sensitive to the immersion depth of the magnetorheological (MR) fluid. Based on the above, a fine tuning of surface roughness (RMS: 0.22 nm) was obtained. This work fills gaps in understanding about the stresses that influence surface roughness during MRF.

Influence of pH value on removal effect of fused silica during magnetorheological finishing

2019 ◽  
Vol 27 (12) ◽  
pp. 2602-2608
Author(s):  
李晓媛 LI Xiao-yuan ◽  
叶敏恒 YE Min-heng ◽  
刘佳保 LIU Jia-bao ◽  
田 东 TIAN Dong ◽  
张云飞 ZHANG Yun-fei ◽  
...  
Keyword(s):  
Ph Value ◽  
Fused Silica ◽  
Magnetorheological Finishing ◽  
Influence Of Ph

Application of Taguchi Methods and ANOVA in Optimization of Process Parameters for Surface Roughness of Fused Silica in the Magnetorheological Finishing Processes

2013 ◽  
Vol 662 ◽  
pp. 449-452 ◽  
Author(s):  
Wei Ran Duan ◽  
Yi Fan Dai ◽  
Yong Shu ◽  
Ian Sherrington
Keyword(s):  
Surface Roughness ◽  
Penetration Depth ◽  
Flow Rate ◽  
Design Method ◽  
Processing Parameters ◽  
High Energy ◽  
Fused Silica ◽  
Taguchi Methods ◽  
Magnetorheological Finishing ◽  
Rotating Speed

Surface roughness plays an important role on optical performances for optics in high-energy laser systems. In this study, optical surface of fused silica were polished by the Magnetorheological Finishing (MRF) processes. The polishing factors in term of Magnetorheological fluid (MR fluid) flow rate, polishing wheel rotational speed, electromagnet current, and polishing ribbon penetration depth, were carried out using an self-developed MRF machine to determine optimum conditions for surface roughness. The settings of the MRF processing parameters were determined by using Taguchi’s experimental design method. Taguchi’s orthogonal array, signal-to-noise (S/N) ratio and analysis of variance (ANOVA) were employed to investigate the optimal processing parameters. The experimental results indicate that surface with smaller roughness could be machined under the conditions with slower rotating speed and higher flow rate and current, and nearly independent of penetration depth.

Experimental investigation and machine parameter optimization for nano finishing of fused silica using magnetorheological finishing process

Optik ◽  
2021 ◽  
Vol 226 ◽  
pp. 165908
Author(s):  
Mahender Kumar Gupta ◽  
D Dinakar ◽  
Inder Mohan Chhabra ◽  
Sunil Jha ◽  
Buchi Suresh Madireddy
Keyword(s):  
Experimental Investigation ◽  
Parameter Optimization ◽  
Fused Silica ◽  
Machine Parameter ◽  
Magnetorheological Finishing ◽  
Finishing Process

Magnetorheological finishing for removing surface and subsurface defects of fused silica optics

2014 ◽  
Vol 53 (9) ◽  
pp. 092010 ◽  
Author(s):  
Rodolphe Catrin ◽  
Jerome Neauport ◽  
Daniel Taroux ◽  
Philippe Cormont ◽  
Cedric Maunier ◽  
...  
Keyword(s):  
Fused Silica ◽  
Magnetorheological Finishing ◽  
Subsurface Defects

Effect of magnetorheological finishing on laser damage properties of fused silica

2016 ◽  
Vol 24 (12) ◽  
pp. 2931-2937
Author(s):  
石 峰 SHI Feng ◽  
万 稳 WAN Wen ◽  
戴一帆 DAI Yi-fan ◽  
彭小强 PENG Xiao-qiang
Keyword(s):  
Fused Silica ◽  
Laser Damage ◽  
Magnetorheological Finishing
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