Material removal characteristics of magnetic-field enhanced shear thickening polishing technology
Material removal characteristics of magnetic-field enhanced shear thickening polishing technology
复制标题
磁场增强剪切增稠抛光技术的材料去除特性
DOI：
10.1016/j.jmrt.2021.09.092
复制
发表时间：
2021-10-05
影响因子：
6.4
通讯作者：
Li, Wei
中科院分区：
文献类型：
--
作者：
Zhou, Dongdong;Huang, Xiangming;Li, Wei
为了实现对各行业中使用的硬脆陶瓷以及其他难加工材料的高效、高质量加工，本研究开发了一种磁场增强剪切增稠抛光技术。基于磁化增强和剪切增稠的耦合效应，该工艺可改善剪切增稠流体的流变性能，实现微观物质的自适应高效去除。分析了磁剪切增稠抛光技术的微观材料去除机理，研究了磁剪切增稠抛光液的流变性能。基于普雷斯顿方程、非牛顿流体的动压力和磁流变抛光理论，建立了材料去除率预测模型，最大相对误差为7.56%。研究了抛光头转速、磨粒浓度和羰基铁粉颗粒浓度对材料去除函数的影响，验证了预测模型的稳定性。在抛光氧化锆工件20分钟后，获得了低损伤的加工表面，表面粗糙度为8.3 nm。验证了材料去除预测模型的有效性，为确定性抛光的实现提供了理论依据。验证了磁场增强剪切增稠抛光方法用于硬脆陶瓷等难加工材料超精密加工的可行性。(c)2021作者由爱思唯尔公司出版。这是一篇开放获取的文章，获得了CC BY-NC-ND许可证（http：//creativecommons.org/licenses/by-nc-nd/4.0/）。
To achieve the efficient and high-quality machining of hard and brittle ceramics used in various industries, in addition to other materials that are difficult to process, a magnetic field enhanced shear thickening polishing technology was developed in this study. Based on the coupling effect of the magnetization enhancement and shear thickening, the proposed processing technology can improve the rheological properties of the shear thickening fluid, thus realizing an adaptive and efficient removal of microscopic materials. Herein, the microscopic material removal mechanism of this technology was analysed and the rheological properties of a magnetic shear thickening polishing fluid were studied. Based on the Preston's equation, the dynamic pressure of non-Newtonian fluids and the magnetorheological polishing theory, a material removal rate prediction model was established and it had a maximum relative error of 7.56%. The influences of the polishing head rotational speed, abrasive particle concentration and carbonyl iron powder particle concentration on the material removal function were investigated and the stability of the prediction model was verified. After polishing a zirconia workpiece for 20 min, a low damage machining surface was obtained and the surface roughness was 8.3 nm. Therefore, the effectiveness of the material removal prediction model was verified and the findings of this study provide a theoretical basis for the realization of deterministic polishing. Moreover, the feasibility of the magnetic-field enhanced shear thickening polishing method for the ultra-precision machining of hard-to-machine materials, such as hard and brittle ceramics, was verified. (c) 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).