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Process parameter effects on material removal in magnetorheological finishing of borosilicate glass

机译：工艺参数对硼硅玻璃磁流变抛光中材料去除的影响

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摘要

We investigate the effects of processing parameters on material removal for borosilicate glass. Data are collected on a magnetorheological finishing (MRF) spot taking machine (STM) with a standard aqueous magnetorheological (MR) fluid. Normal and shear forces are measured simultaneously, in situ, with a dynamic dual load cell. Shear stress is found to be independent of nanodiamond concentration, penetration depth, magnetic field strength, and the relative velocity between the part and the rotating MR fluid ribbon. Shear stress, determined primarily by the material mechanical properties, dominates removal in MRF. The addition of nanodiamond abrasives greatly enhances the material removal efficiency, with the removal rate saturating at a high abrasive concentration. The volumetric removal rate (VRR) increases with penetration depth but is insensitive to magnetic field strength. The VRR is strongly correlated with the relative velocity between the ribbon and the part, as expected by the Preston equation. A modified removal rate model for MRF offers a better estimation of MRF removal capability by including nanodiamond concentration and penetration depth.
机译：我们研究了加工参数对硼硅酸盐玻璃材料去除的影响。在磁流变整理（MRF）点取机（STM）上使用标准含水磁流变（MR）流体收集数据。使用动态双测力传感器同时在原位同时测量法向力和剪切力。发现剪切应力与纳米金刚石浓度，穿透深度，磁场强度以及零件与旋转MR流体带之间的相对速度无关。剪切应力主要由材料的机械性能决定，在MRF中占主导地位。纳米金刚石磨料的添加大大提高了材料去除效率，在高磨料浓度下去除率达到饱和。体积去除率（VRR）随着穿透深度的增加而增加，但对磁场强度不敏感。正如Preston方程所期望的，VRR与色带与零件之间的相对速度密切相关。修改后的MRF去除速率模型通过包含纳米金刚石浓度和穿透深度，可以更好地估计MRF去除能力。

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