An experimental investigation on micro-milling of polymethyl methacrylate components with nanometric surface roughness
An experimental investigation on micro-milling of polymethyl methacrylate components with nanometric surface roughness
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DOI：
10.1177/0954405413507251
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发表时间：
2014-05-01
期刊：
影响因子：
2.6
通讯作者：
Cheng, Kai
中科院分区：
文献类型：
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作者：
Jiao, Feifei;Cheng, Kai
由聚甲基丙烯酸甲酯制成的微光学元件的需求越来越大。本文介绍了金刚石微铣削具有纳米表面粗糙度的有机玻璃零件的实验研究及其应用前景。在自行研制的高精度、高动态性能的超精密微细铣削机床（UltraMill）上，采用化学气相沉积金刚石球头立铣刀进行了微细铣削试验研究。采用白色光干涉仪测量了不同微铣削策略下微铣削槽的表面粗糙度。结果表明，当进给方向与切削方向垂直时，可以获得较小的表面粗糙度。通过应用不同的微铣削策略和工艺参数，在2 x 2 mm（2）区域上进行微铣削。结果表明，微铣削策略，可以产生良好的表面粗糙度在槽微铣削不能产生预期的表面粗糙度在这么大的面积（2 × 2毫米（2）），加工动力学起着重要的作用。采用双向联合微铣削策略，通过调整工艺参数，获得了粗糙度为8.717 nm的光学表面。
Micro-optical components made from polymethyl methacrylate are increasingly in demand. This article presents an experimental investigation into diamond micro-milling of polymethyl methacrylate components with nanometric surface roughness and its application perspectives. The experimental micro-milling trials with a chemical vapour deposition diamond ball endmill are conducted on a self-developed ultra-precision micro-milling machine (UltraMill) featuring high precision and high dynamic performance. Surface roughness of micro-milled slots using different micro-milling strategies is measured with white light interferometer. Results show that when feed and cutting orientations are perpendicular, smaller surface roughness can be obtained. Micro-milling is carried out on 2 x 2 mm(2) areas by applying different micro-milling strategies and process parameters. The results demonstrate that the micro-milling strategy which can generate good surface roughness in slot micro-milling cannot produce expected surface roughness on such a large area (2 x 2 mm(2)), and machining dynamics plays an important role. By applying two-way joint micro-milling strategy and adjusting process parameters, an optical surface is obtained with roughness of 8.717 nm.