芳纶纤维复合材料高速钻削加工缺陷研究

Study on Defects in High Speed Drilling of Aramid Fiber Reinforced Plastic

芳纶纤维复合材料(AFRP)因其高强度、高韧性以及超强的抗冲击等优越性能而广泛应用于军工、航空、航天等领域。但在高速钻削过程中,由于材料的各向异性及导热性差等特性,刀具极易磨损,导致生成诸多加工缺陷。本文采用TiCN涂层刀具对芳纶纤维复合材料进行高速钻削试验,探讨刀具磨损规律,研究刀具磨损对孔出口撕裂和孔壁粗糙度的影响规律,分析加工缺陷产生的机理。结果表明:刀具磨损对出口撕裂和孔壁粗糙度均有显著影响,整体呈线性增加趋势,而在正常磨损阶段,孔壁粗糙度出现下降并在一定范围内波动。

Aramid fiber reinforced plastic(AFRP)is widely used in military,aerospace and aerospace industries due to its high strength,toughness and superior impact resistance.However,in the high-speed drilling process,due'to the anisotropy of the material and poor thermal conductivity,the tool is extremely easy to wear,resulting in many machining defects. In this paper,the high-speed drilling test of aramid fiber composites is carried out by TiCN coated tools.The wear law of the tool is discussed.Then,the influence of tool wear on the tear of the hole outlet and roughness is studied.At last,the mechanism of machining defects is analyzed.The results show that the tool wear has a significant effect on the tear of the outlet and the roughness,and the overall trend increases linearly.At the stage of stable wear,the roughness decreases and fluctuates within a certain range.