Hu Hanjie, Du Bing, Ning Conggang, Zhang Xiaodong, Wang Zhuo, Xiong Yangyang, Zeng Xianjun, Chen Liming
School of Aeronautics, Chongqing Jiaotong University, Chongqing 400074, China.
The Green Aerotechnics Research Institute of CQJTU, Chongqing 401120, China.
Materials (Basel). 2022 Apr 6;15(7):2703. doi: 10.3390/ma15072703.
The composite-material laminate structure will inevitably encounter connection problems in use. Among them, mechanical connections are widely used in aerospace, automotive and other fields because of their high connection efficiency and reliable connection performance. Milling parameters are important for the opening quality. In this paper, continuous-glass-fiber-reinforced-polypropylene (GFRPP) laminates were chosen to investigate the effects of different cutters and process parameters on the hole quality. The delamination factor and burr area were taken as the index to characterize the opening quality. After determining the optimal milling tool, the process window was obtained according to the appearance of the milling hole. In the selected process parameter, the maximum temperature did not reach the PP melting temperature. The best hole quality was achieved when the spindle speed was 18,000 r/min and the feed speed was 1500 mm/min with the corn milling cutter.
复合材料层合板结构在使用过程中不可避免地会遇到连接问题。其中，机械连接因其连接效率高、连接性能可靠而在航空航天、汽车等领域得到广泛应用。铣削参数对开孔质量很重要。本文选用连续玻璃纤维增强聚丙烯（GFRPP）层合板，研究不同刀具和工艺参数对孔质量的影响。以分层因子和毛刺面积作为表征开孔质量的指标。确定最佳铣刀后，根据铣削孔的外观获得工艺窗口。在所选工艺参数下，最高温度未达到PP的熔点。使用玉米铣刀，主轴转速为18000 r/min、进给速度为1500 mm/min时，孔质量最佳。
