摘要
针对碳纤维增强树脂基复合材料(CFRP),围绕1064nm皮秒激光加工方式改进和工艺参量调整,开展热损伤抑制试验。结果表明:沿纤维方向切割质量明显优于垂直方向,材料各向异性决定了热量主要沿纤维方向传递并向材料内部扩散。采用运动平台结合振镜扫描的复合切割方式优于传统方式,且适用于较厚材料加工。热损伤程度与激光功率、切割速度、扫描半径和填充间距等工艺参量密切相关,这是由脉冲能量密度及脉冲分散程度决定的。此外,切透材料后适当增加切割次数可进一步改善切割质量。工艺优化后,垂直于纤维方向复合切割2.1mm厚试样,获得了极佳的切割质量,切缝表面无附着物、裂纹、孔隙等缺陷,材料内部热影响区宽度小于10μm。
With the carbon fiber reinforced resin matrix composite(CFRP)as the processing object,the thermal damage inhibition experiment was carried out around the improvement of 1064nm picosecond laser processing mode and the adjustment of process parameters.The results show that the cutting quality along the fiber direction is better than that in the vertical direction,and the anisotropy of the material determines that the heat mainly transfers along the fiber direction and diffuses to the inside of the material.The composite cutting method of moving platform combined with galvanometer is better than the traditional method,and is suitable for thick material processing.The degree of thermal damage is closely related to laser power,cutting speed,scanning radius and filling distance,which is determined by pulse energy density and pulse dispersion.In addition,cutting quality can be further improved by properly increasing cutting times after cutting through materials.After the process optimization,the cutting quality of 2.1mm thick sample is excellent by composite method,and excellent cutting quality was obtained.There were no defects such as attachments,cracks and pores on the surface of the slit,and the width of the heat affected zone in the material was less than 10μm.
作者
李元成
张晓兵
张伟
许国栋
梁恒亮
邱一
刘壮
Li Yuancheng;Zhang Xiaobing;Zhang Wei;Xu Guodong;Liang Hengliang;Qiu Yi;Liu Zhuang(National Key Laboratory of Science and Technology on Power Beam Processes,AVIC Manufacturing Technology Institute,Beijing100024,China;AVIC Composite Co.,Ltd.,AVIC Manufacturing Technology Institute,Beijing101300,China;College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing,Jiangsu210001,China)
出处
《应用激光》
CSCD
北大核心
2021年第2期245-251,共7页
Applied Laser
基金
国家科技重大专项(2017-VII-0015-0111)。
