In this study a magnetic abrasive finishing (MAF) platform was developed by which an innovative MAF tool design was verified. The platform was composed of a tool per se, a linear moving table where a specimen placed on it, and a slurry supplying pump. The magnetic field was provided by two sets of NdFeB permanent magnets placed with opposite directions inside the tool. By using a C-shape and taper structure of low carbon steel, the magnetic flux generated by the magnets formed a magnetic circuit and was directed and concentrated at the opening notch of the C-shape structure where the tool tip was. A slurry composited of magnetorheological (MR) fluid, abrasive particles, and silicon oil was served as a MR abrasive slurry. The slurry was propelled to the tool tip by the slurry supplying pump and was then magnetized there to form a magnetic brush. While the table moved relative to the tool the magnetized slurry scrubbed a specimen on it. It is observed that after 2 ~ 3 hundreds of times of reciprocating motions, the magnetic brush would be stiffened and a highly efficient finishing machining process could be achieved. With aluminum specimens of initial surface roughness of Ra ~ 0.5 μm as examples, it is demonstrated that a fine surface of Ra ~ 0.06 μm could be achieved in about 2 ~ 3 min.

在这项研究中，开发了磁性磨料精加工（MAF）平台，通过该平台验证了创新的MAF工具设计。该平台由一个工具本身，一个放置样品的线性移动工作台以及一个泥浆供应泵组成。磁场由两组NdFeB永磁体以相反的方向放置在工具内部提供。通过使用低碳钢的C形锥度结构，由磁体产生的磁通形成磁路，并被引导并集中在C形结构的刀尖所在的开口处。将磁流变（MR）流体，磨料颗粒和硅油复合而成的浆料用作MR磨料浆料。浆液通过浆液供应泵被推进到工具尖端，然后在那里被磁化以形成磁刷。当工作台相对于工具移动时，磁化的浆料在其上擦洗了一个样本。观察到，经过2到3百次往复运动之后，磁刷将变硬，从而可以实现高效的精加工过程。以初始表面粗糙度为Ra〜0.5μm的铝样品为例，证明了在大约2〜3 min内可以实现Ra〜0.06μm的精细表面。