Wang Dekang, Hu Haixiang, Li Longxiang, Bai Yang, Luo Xiao, Xue Donglin, Zhang Xuejun
Opt Express. 2017 Oct 30;25(22):26600-26614. doi: 10.1364/OE.25.026600.
Belt magnetorheological finishing (Belt-MRF) is a promising tool for large-optics processing. However, before using a spot, its shape should be designed and controlled by the polishing gap. Previous research revealed a remarkably nonlinear relationship between the removal function and normal pressure distribution. The pressure is nonlinearly related to the gap geometry, precluding prediction of the removal function given the polishing gap. Here, we used the concepts of gap slope and virtual ribbon to develop a model of removal profiles in Belt-MRF. Between the belt and the workpiece in the main polishing area, a gap which changes linearly along the flow direction was created using a flat-bottom magnet box. The pressure distribution and removal function were calculated. Simulations were consistent with experiments. Different removal functions, consistent with theoretical calculations, were obtained by adjusting the gap slope. This approach allows to predict removal functions in Belt-MRF.
带式磁流变抛光（Belt-MRF）是一种用于大尺寸光学元件加工的很有前景的工具。然而，在使用光斑之前，其形状应由抛光间隙进行设计和控制。先前的研究揭示了去除函数与法向压力分布之间存在显著的非线性关系。压力与间隙几何形状呈非线性关系，这使得在已知抛光间隙的情况下无法预测去除函数。在此，我们利用间隙斜率和虚拟带的概念建立了带式磁流变抛光中去除轮廓的模型。在主抛光区域的带材与工件之间，使用平底磁盒创建了一个沿流动方向线性变化的间隙。计算了压力分布和去除函数。模拟结果与实验结果一致。通过调整间隙斜率获得了与理论计算相符的不同去除函数。这种方法能够预测带式磁流变抛光中的去除函数。
