基于Halbach阵列的K9玻璃磁流变抛光方法研究

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关键词：磁流变抛光;Halbach阵列；K9玻璃；表面粗糙度；材料去除率中图分类号：TG580.692 文献标识码：Adoi：10.37188/OPE.20253320.3214 CSTR：32169.14.OPE.20253320.3214

Abstract：To enhance the excitation performance and processing quality of magnetorheological polishing， a Halbach array-based permanent magnet arrangement is proposed，and the influence of process parameters on the polishing performance of K9 glass is investigated.Magnetic field simulations were conducted to compare the Halbach array，traditional N-S pole alternating array，and inner-outer alternating array in terms of magnetic field strength，magnetic flux density magnitude，gradient distribution，and the force acting on carbonyl iron particles. Combined with single-factor experiments，the effects of workpiece rotation speed，magnetic field rotation speed，working gap，and excitation gap on surface roughness and material removal rate were systematically studied. The results indicate that the Halbach array expands the effective acting area of the magnetic field，maintains good uniformity，and enhances both magnetic field strength and abrasive particle force，thereby exhibiting superior excitation performance. With increasing workpiece rotation speed，magnetic field rotation speed，and working gap，the surface roughness decreases initially and then increases，while the material removal rate increases at first and then decreases.As the excitation gap increases，the surface roughness keeps rising and the material removal rate declines. Under the conditions of a workpiece rotation speed of 650r/min ， magnetic field rotation speed of 70r/min ， working gap of 1.2mm ，excitation gap of 4mm ，and a polishing duration of 30min ， the surface roughness of K9 glass reaches 0.0297μm ，and the material removal rate is 51.928nm/min . The Halbach array excitation method and its corresponding polishing process efectively improve the performance of magnetorheological polishing.

Key words： magnetorheological polishing； Halbach arry；K9 glass； surface roughness；material remov-al rate

1引言

K9玻璃因其优异的机械强度和化学稳定性，被广泛应用于航空航天、光电子及科研医疗等领域[1]。（剩余17196字）