Fundamental performance of Magnetic Compound Fluid (MCF) wheel in ultra-fine surface finishing of optical glass

Li, Jiao; Wu, Yongbo; Wang, X.; Guo, Hui Ru; Liang, Zhiqiang

doi:10.1016/j.ijmachtools.2013.09.003

Cited by 35 publications

(14 citation statements)

References 17 publications

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“…Magnetorheological (MR) finishing has been widely used for polishing mirror surfaces [13][14][15][16][17][18][19][20][21] with promising removal efficiency. In our previous work, we developed a MR planarization process which uses a permanent magnetic (PM) yoke with a straight air gap [22].…”

Section: Introductionmentioning

confidence: 99%

Polishing characteristics and mechanism in magnetorheological planarization using a permanent magnetic yoke with translational movement

Wang

Yin

Huang

2016

Precision Engineering

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Section: Introductionmentioning

confidence: 99%

Polishing characteristics and mechanism in magnetorheological planarization using a permanent magnetic yoke with translational movement

Wang

Yin

Huang

2016

Precision Engineering

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“…This method has been successfully applied for finishing of different types of hard-to-machine materials such as ceramics, stainless steels, high-carbon steels, composites, and so on [9][10][11][12][13]. Also, a few studies have been performed toward polishing of glass using magnetic-field-assisted processes [14][15][16][17]. Hence, in this work the performance of MAF process as an efficient and cost-effective method was evaluated during finishing of BK7 optical glass.…”

Section: Introductionmentioning

confidence: 99%

Nano-finishing of BK7 optical glass using magnetic abrasive finishing process

Pashmforoush

Rahimi

2015

Appl. Opt.

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BK7 is an optical glass extensively used in lens manufacturing. In this work, magnetic abrasive finishing (MAF) method was utilized for finishing of this hard-to-machine material and the effect of various process parameters on surface roughness was investigated using response surface methodology. The best surface roughness value achieved was 23 nm. Among various finishing parameters, the abrasive size was found to be the most significant parameter followed by machining gap, magnetic particles size, rotational speed, and percentage weight of binding agent. Also, the mechanisms of material removal were studied by using atomic force microscopy (AFM). The AFM observations revealed that both microcutting and microfracture mechanisms might exist during MAF of brittle materials depending on the finishing conditions.

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“…Das et al [15] proposed a new finishing process named as rotationalmagnetorheological abrasive flow finishing and experiments on nanofinishing of flat workpieces of both stainless steel and brass material were presented. Jiao et al [16] developed an ultra-fine finishing method for optical glass using magnetic compound fluid wheel. Yan et al [17] proposed a cluster magnetorheological plane polishing based on combination of magnetorheological finishing and cluster mechanism for large planar optical workpiece.…”

Section: Introductionmentioning

confidence: 99%

Design and fabrication of a novel magnetorheological finishing process for small concave surfaces using small ball-end permanent-magnet polishing head

Chen

Liu

et al. 2015

Int J Adv Manuf Technol

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In order to overcome the defects of conventional magnetorheological finishing (MRF) processes that are unable to finish small curvature radius concave surfaces of diameter within 10 mm, a novel precision MRF process using small ball-end permanent-magnet polishing head with a diameter of 4 mm is proposed in this paper. And experimental setup of a four-axis linkage MRF machine tool is fabricated. Magnetostatic simulation of the distribution of magnetic flux density indicates that the magnetic field uniformity of produced polishing head is 93.3 %. Magnetizing force analysis is done to analyze the formation of magnetorheological fluid in finishing region. In addition, the suitable range of C-axis angular position for finishing is generated to be 60°~70°. Finishing experiments on both nonmetallic and metallic specimens with different surface shapes have been conducted. The ability of the developed method of finishing process to improve surface characteristics of a workpiece is demonstrated to reach the surface roughness of finished surfaces below Ra 6 nm. It confirms that the present MRF process is capable of improving surface quality and performing the nanofinishing on small curvature radius concave surfaces.

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Fundamental performance of Magnetic Compound Fluid (MCF) wheel in ultra-fine surface finishing of optical glass

Cited by 35 publications

References 17 publications

Polishing characteristics and mechanism in magnetorheological planarization using a permanent magnetic yoke with translational movement

Polishing characteristics and mechanism in magnetorheological planarization using a permanent magnetic yoke with translational movement

Nano-finishing of BK7 optical glass using magnetic abrasive finishing process

Design and fabrication of a novel magnetorheological finishing process for small concave surfaces using small ball-end permanent-magnet polishing head

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