| LI Feng,LI Yong-quan,LI Wen-ke,WANG Bo,LI Zhe-jun.Surface Roughness and Surface Morphology of Milled Carbon/Epoxy Composite Surface[J],46(9):264-269 |
| Surface Roughness and Surface Morphology of Milled Carbon/Epoxy Composite Surface |
| Received:March 30, 2017 Revised:September 20, 2017 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2017.09.042 |
| KeyWord:carbon fiber/resin-based composite milling surface roughness surface morphology |
| Author | Institution |
| LI Feng |
Xi'an Aviation College, Xi'an , China |
| LI Yong-quan |
Beifang University of Nationalities, Yinchuan , China |
| LI Wen-ke |
Xi'an Aero Engine Group Co., Ltd, Xi'an , China |
| WANG Bo |
Xi'an Aviation College, Xi'an , China |
| LI Zhe-jun |
Xi'an Aviation College, Xi'an , China |
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| Abstract: |
| As a kind of excellent polymer matrix composite, carbon fiber reinforced polymer (CFRP) is widely used in manufacturing of aircraft and spacecraft components. CFRP components are usually near net shape, but they also shall be subject to second cutting after demoulding to ensure size of the assembly. This work aims to investigate rule of effects of some main processes on surface quality of CFRP during milling process, so as to provided basis for optimizing cutting parameters and further improving surface quality of such parts. A single-factor experiment was designed among cutting parameters, tool structure, machining method, finished surface roughness and morphology of CFRP. Law of change in surface roughness, cutting parameters, tool structure and machining method was obtained by adjusting one of the cutting parameters and reserving the rest of cutting parameters. As the mil-ling speed increased, surface roughness of the workpiece changed slightly, surface micro-pit defects increased but diminished and shallowed. As the feeding speed increased, both the surface roughness and surface defects increased. Uncoated multitooth cutter exhibited the maximum workpiece surface roughness, followed by multitooth cutter with diamond coating, and finally staggered tooth cutter with diamond coating. In addition, surface processed by the multitooth cutter had more micro-pit defects, which were generally shallow and small. The staggered tooth cutter had inhibition most significant effects on delamination defect, but serious processing defects might be present in joints of left- and right-hand cutter teeth. Compared with common mechanical machining, workpiece acquired in ultrasonic vibration machining method exhibited better surface quality of the CFRP, less surface micro-pit defects and better CFRP milling surface quality. In order to obtain a better surface quality during CFRP milling, higher milling speed and lower feed speed as well as multitooth coated cutter shall be selected. Compared with common machining method, the ultrasonic vibration machining method may contribute to better surface quality. |
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