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Acta Armamentarii ›› 2014, Vol. 35 ›› Issue (4): 531-539.doi: 10.3969/j.issn.1000-1093.2014.04.015

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Research on Milling of Plain-woven Carbon Fiber-reinforced Composites

SU Fei, YUAN Jun-tang, YU Bin-bin, WANG Zhen-hua   

  1. (School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China)
  • Received:2013-06-26 Revised:2013-06-26 Online:2014-05-26
  • Contact: SU Fei E-mail:sfeihe@163.com

Abstract: In view of the hardness, brittleness and machining difficulty of fiber-reinforced composite material, a milling mode is put forward to machine the carbon fibre-reinforced plastics(CFRP), of which the fiber fabric stands vertically. The quality and the microstructures of the machined surfaces are analyzed. The blind-slot milling testes on plain-woven carbon fiber-reinforced composites are conducted. A scanning electron microscope is used to observe the microstructures of the machined surfaces and the swarf. The results show that the delamination is decreased by 30.44% on average with the increase in the cutting speed vc; and it is increased by 73.49% on average with the increase in the feed speed vf. There are 5 kinds of micro-fractographs of fiber weft and 2 kinds of micro-fractograps of fiber warp. In this milling mode, the intertexture structure can improve the machined surface quality of the front wall of slot, and the machined surface of the bottom of slot is smooth. Therefore, this milling mode is feasible. But there are some serious defects on the region of the cut-out side where a vulnerable place is. The results provide some useful references for the choice of milling mode and the quality improvement of machined surfaces.

Key words: composite material, cutting mechanism, microstructure of milled surface, plain-woven fabric, carbon fibre-reinforced plastics, swarf

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