Simulation and Experimental Study of Magnetic Field-assisted Shear Thickening Fluid Polishing for Cemented Carbide Blades

被引：0
|
作者：
Li H. [1 ]
Huang X. [1 ]
Ming Y. [1 ]
Li X. [1 ]
Zeng Q. [1 ]
Zhou D. [1 ]
机构：
[1] College of Mechanical and Vehicle Engineering, Hunan University, Changsha
来源：
Zhongguo Jixie Gongcheng/China Mechanical Engineering | 2023年 / 34卷 / 06期
关键词：
cemented carbide blade; magnetic field-assisted shear thickening polishing; material removal rate; rheological property; surface quality;
D O I：
10.3969/j.issn.1004-132X.2023.06.003
中图分类号：
学科分类号：
摘要：
In order to improve the surface quality of ground cemented carbide blades, a new method for polishing cemented carbide blades, magnetic field-assisted shear thickening fluid polishing, was proposed. The basic principles of the polishing method were introduced, the polishing liquid was prepared, and the rheological properties were tested and analyzed. Based on the rheological test results, the optimal preparation scheme of the polishing liquid was obtained. The flow field state of the workpiece surface under different placement methods was obtained by the ANSYS FLUENT module, and the distribution of dynamic pressure and shear stress on the workpiece surfaces was analyzed under different polishing speeds and magnetic induction strengths, and the placement mode and processing parameters of the workpiece were determined. A polishing experimental platform was established, and the effects of polishing speed, magnetic induction intensity and other processing parameters on the surface roughness and material removal rate were explored. The experimental results show that the surface roughness Ra decreases with the increasing polishing speed, but it is not significantly affected by the magnetic induction intensity. And the product of the shear stress and velocity of the polishing liquid on the workpiece surfaces has a positive correlation with the material removal rate. By optimizing the polishing processing parameters (The workpiece is placed vertically, the polishing speed is as 100 r/min, and the magnetic induction intensity is as 30 mT), the ultra-precision machined surfaces with surface roughness Ra:15 nm and the high material removal rate(11.1 μm/h) may be obtained. © 2023 China Mechanical Engineering Magazine Office. All rights reserved.
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页码：650 / 659
页数：9
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