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| Experimental Investigation on Milling Characteristic of CFRP Composites Under Supercritical Carbon Dioxide Based Cryogenic Environment |
| ZOU Fan1，WANG Xianfeng2， ZHANG Hongzhou2，AN Qinglon1 |
| Shanghai Jiao Tong University, Shanghai 200240, China;COMAC Shanghai Aircraft Manufacturing Co., Ltd., Shanghai 200436, China |
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Abstract Carbon fiber reinforced polymer (CFRP) has been widely used in aerospace field because of its excellent material performance. Because of its heterogeneity, anisotropy and high temperature-sensitivity, machining defects is prone to occur. In this work, the milling experiments of T800/X850 carbon fiber composite laminates, which are commonly used in aviation industry, were carried out to investigate the feasibility of supercritical carbon dioxide based cryogenic cooling method in CFRP composites machining. The results show that cryogenic environment can significantly reduce the cutting temperature and improve the surface quality compared with dry environment. Meanwhile, the bending moment of cutting process under cryogenic environment is higher than that under dry environment. The combination of high cutting speed,low feed rate and cryogenic environment is helpful to improve the machining quality and efficiency of CFRP composite.
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2021, 
