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通过提高磁流变液温度提高永磁小球头磁流变抛光效率的机理研究

Study on mechanism of improving efficiency of permanent-magnet small ball-end magnetorheological polishing by increasing magnetorheological fluid temperature.

作者信息

Tian Jinchuan, Chen Mingjun, Liu Henan, Qin Biao, Cheng Jian, Sun Yazhou

机构信息

Center for Precision Engineering, Harbin Institute of Technology, P.O. Box 413, Harbin, 150001, Heilongjiang, People's Republic of China.

出版信息

Sci Rep. 2022 May 11;12(1):7705. doi: 10.1038/s41598-022-11937-8.

DOI:10.1038/s41598-022-11937-8
PMID:35546348
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9095837/
Abstract

Permanent-magnet small ball-end magnetorheological polishing method can be used to polish the small part with complex structure. However, the material removal rate of this method is low, which is difficult to improve the output and reduce the cost. In this research, the effect of magnetorheological fluid temperature on the material removal rate is theoretically analyzed by measuring the effect of temperature on the flow properties of magnetorheological fluid, establishing the hydrodynamic model of polishing zone and solving the material removal parameters. It is found that with the increase of the magnetorheological fluid temperature, the polishing relative velocity increases accordingly, which can promote the improvement of material removal rate. But the shear stress decreases accordingly, which inhibits the improvement of material removal rate. The verification experiment results show that the promoting effect can exceeds the inhibitory effect, so that the material removal rate increases with the increase of magnetorheological fluid temperature. When the magnetorheological fluid temperature increases to 60 °C, the material removal rate is improved by 108.4% and the polished surface roughness Sa can reach 14.9 nm. Therefore, increasing the magnetorheological fluid temperature can significantly improve the efficiency of permanent-magnet small ball-end magnetorheological polishing and obtain high quality polished surface.

摘要

永磁小球头磁流变抛光方法可用于对结构复杂的小零件进行抛光。然而，该方法的材料去除率较低，难以提高产量并降低成本。在本研究中，通过测量温度对磁流变液流动特性的影响，建立抛光区的流体动力学模型并求解材料去除参数，从理论上分析了磁流变液温度对材料去除率的影响。研究发现，随着磁流变液温度的升高，抛光相对速度相应增加，这可促进材料去除率的提高。但剪切应力相应减小，这抑制了材料去除率的提高。验证实验结果表明，促进作用超过抑制作用，使得材料去除率随磁流变液温度的升高而增加。当磁流变液温度升高到60℃时，材料去除率提高了108.4%，抛光表面粗糙度Sa可达14.9nm。因此，提高磁流变液温度可显著提高永磁小球头磁流变抛光的效率，并获得高质量的抛光表面。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d092/9095837/96a3270a5e32/41598_2022_11937_Fig12_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d092/9095837/dc56f28adfb0/41598_2022_11937_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d092/9095837/4c18739d5b66/41598_2022_11937_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d092/9095837/835304fb24d0/41598_2022_11937_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d092/9095837/a7379a973ea3/41598_2022_11937_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d092/9095837/8928ba36e95f/41598_2022_11937_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d092/9095837/0e21d55317ef/41598_2022_11937_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d092/9095837/4eeef96f6ac5/41598_2022_11937_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d092/9095837/c135ec9af156/41598_2022_11937_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d092/9095837/78584219dd54/41598_2022_11937_Fig11_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d092/9095837/96a3270a5e32/41598_2022_11937_Fig12_HTML.jpg

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本文引用的文献

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Shear stress in magnetorheological finishing for glasses.玻璃磁流变抛光中的剪切应力。
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