| XIAO Xiao-lan,YAN Qiu-sheng,PAN Ji-sheng,JIAO Jing-hao.A Novel Polishing Method for High Precision Ceramic Balls Based on Magnetorheological Polisher[J],48(2):268-274 |
| A Novel Polishing Method for High Precision Ceramic Balls Based on Magnetorheological Polisher |
| Received:August 07, 2018 Revised:February 20, 2019 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2019.02.038 |
| KeyWord:ceramic ball clustered magneto rheological polishing motion trajectory simulation surface roughness sphericity |
| Author | Institution |
| XIAO Xiao-lan |
School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou , China |
| YAN Qiu-sheng |
School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou , China |
| PAN Ji-sheng |
School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou , China |
| JIAO Jing-hao |
School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou , China |
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| Abstract: |
| The work aims to provide a new technology of clustered magneto rheological polishing for ceramic ball to realize the effective and supper-smooth polishing of ceramic ball surface. On the basis of the traditional V-groove polishing ceramic ball, the cluster magnetic pole and rotary motor of the upper plate were increased, and appropriate magnetorheological polishing liquid was prepared. The magnetorheological polishing pad was formed by the cluster magnetic pole of the upper and lower polishing plates for grinding and polishing. Based on geometric kinematics and dynamic analysis of ceramic ball work piece, the influence relation of various motion parameters of the ball was obtained. The ball forming process was simulated dynamically by the analysis software ADAMS in the mechanical system. This polishing method could actively control the motion of the sphere and realize the fast and uniform full envelope of the spherical polishing trajectory. According to the simulation results, the rotation angle of the ceramic ball was controlled by adjusting the parameters such as rotation speed, eccentricity and machining gap of the upper and lower polishing plates, so as to achieve fast and efficient super smooth polishing of the spherical surface. The silicon nitride ceramic balls were polished for 2.5 h with the self-designed magnetorheological polishing experimental device. The surface roughness Ra decreased from about 60 nm to about 10 nm, and the sphericity error was 0.13 mm, which reached the national standard (level of G5), the national standard for ceramic ball bearings. The clustered magnetorheological polishing method can realize fast uniform full envelope of spherical polishing trajectory, and achieve efficient ultra-smooth polishing on the surface of ceramic balls and can be studied further. |
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