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| Research on 3D Surface Topography in Milling of CFRP |
| FAN Wentao, CHEN Yan, CHEN Yijia, XIE Songfeng, JI Junjie, JI Daohang |
| (Jiangsu Key Laboratory of Precision and Micro–Manufacturing Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China) |
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Abstract Carbon fiber reinforced polymer (CFRP) is a typical difficult–to–machining material. There are still some problems in its milling process, such as the poor surface quality and difficulty in fully characterizing the surface topography. In this article, slot–milling tests were carried out with different feed speeds, and the surface topography and machining mechanism of CFRP milling was studied. It was found that there was a big deficiency using two–dimensional surface roughness parameters, three–dimensional surface roughness can more comprehensively reflect the surface topography of CFRP milling. The surface topography of CFRP was jointly characterized by arithmetic mean height Sa, root mean square height Sq, skewness Ssk and kurtosis Sku. With the increase of the feed speed, Sa and Sq increase gradually, but Ssk and Sku decrease. In order to guarantee the machined surface quality, the down milling method is used, and the feed speed should be less than 1200mm/min.
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2021, 
