激光切割碳纤维复合材料的实验研究

Experimental study about laser cutting of carbon fiber reinforced polymer

为了获得激光切割参量对碳纤维复合材料的影响规律,利用额定功率为500W的毫秒脉冲Nd∶YAG激光器,分别进行了在空气中和水下切割碳纤维复合材料(CFRP)的实验研究。采用单因素实验法,考察了脉冲能量、频率、切割速度与气体压力等激光参量对切割质量的影响,获得了激光参量对切割CFRP材料切口的切缝宽度、正面纤维拔出长度、背面纤维拔出长度与锥角的影响规律,并对激光切割机理进行了分析研究。结果表明,水下切割能有效地减小激光切割产生的热影响区。这为继续开展激光水下切割CFRP的研究提供了参考。

In order to obtain the influence rule of laser cutting parameters on carbon fiber reinforced polymer （CFRP）, CFRPs were cut with a 500W millisecond pulsed Nd：YAG laser in air and under the water respectively. The relationships of pulse energy, frequency, cutting speed, gas pressure with the cutting quality were investigated by means of the one-factor experimental design. The influence of the laser cutting parameters on kerf width, fiber pull out at the beam entrance, fiber pull out at the beam exit and taper angle were obtained. The laser cutting mechanism was also analyzed and studied. The research shows that the laser cutting under the water can greatly reduce the heat affected zone generated by the laser cutting, which provides some reference for the further research of the laser cutting CFRP under the water.