自由曲面结构磁性抛光去除试验研究

磁性抛光因柔性工具的工件表面适应性高而具有较好的应用潜力。自行设计抛光工具头,制备磁性抛光体,搭建试验平台,并对不锈钢平面工件进行定点抛光试验,平均去除效率为0.231μm/10min,且工件表面质量得到了很大的改善,验证了该磁性抛光方法的可行性。继而对两种自由曲面结构工件进行抛光:一是采用工具头水平移动式、工具头等高线移动式两种不同的抛光进给运动方式对不同曲率的不锈钢工件进行抛光去除试验,试验证明:两种抛光方式对每个曲率的轮廓均有去除能力,去除量在0.14~1.33μm之间;二是对3D打印的光敏树脂微结构自由曲面定点抛光,单位时间去除效率在8.957~12.587μm/10min之间,且改善了轮廓的光滑度。初步试验表明,磁性抛光方法对两种自由曲面结构均有一定的去除能力,可进一步探索磁性抛光技术应用于自由曲面结构确定性抛光。

Study on Remove of Free-Form Surface Structure by Magnetic Polishing

Magnetic polishing technique has wide application potential due to the high adaptability of flexible tool to the workpiece surface.The relevant polishing tools were developed,and a test platform was established in the paper.The workpiece finish had been greatly improved after spot polishing on stainless steel fiat parts,and the average removal efficiency was 0.231 μm/10 rain,which verified the feasibility of the magnetic polishing method.Then two kinds of free-form surface structures were polished by magnetic polishing method.First,stainless steel parts with different curvatures were polished by two different polishing feed movement ways.Experimental results showed that two polishing methods had the ability to remove the contours of each curvature,and the removal amount falls between 0.14-1.33 μm.Secondly,the removal efficiency was between 8.957-12.587 μm/10min after spot polishing the microstructured free-form surface,and the smoothness of the contour is improved.Preliminary experiments showed that the magnetic polishing method had the ability to remove both free-form surface structures,so it can explore further magnetic polishing technology used in deterministic polishing of free-form surface structure.