基于导热板的碳纤维增强聚醚醚酮复合材料感应焊接温度调控

Temperature control for induction welding of carbon fiber reinforced polyetheretherketone(CF/PEEK)composite material via thermal conduction plate

研究了碳纤维增强聚醚醚酮(CF/PEEK)复合材料感应焊接中厚度方向及焊接面内的温度分布及调控。基于对温度分布结果的分析,使用导热板结合真空袋压的方式对CF/PEEK进行感应焊接,结合使用合适的功率及加热时间,测试了焊接件的单搭接强度,观测分析了焊接件的断裂形貌。结果表明,导热板对层合板表层和边缘均有良好的散热效果;焊接功率越低,焊接面的加热均匀性增加,但是会延长加热时间。在真空袋中对层合板上表面和两侧添加导热板,在输出功率示数为600时感应焊接300 s,焊接件的单搭接剪切强度达到41.57 MPa。

The temperature distribution along the thickness direction and along the weld line for carbon fiber reinforced polyetheretherketone(CF/PEEK)composite was recorded and optimized.According to the temperature distribution result,the induction welding of CF/PEEK laminates was carried out with appropriate power and heating time,with the help of vacuum bag and properly placed thermal conduction plates.The single lap strength of the welded sample was tested,and the fracture morphology of the weld area was observed and analyzed.The results show that the thermal conduction plates have a good heat dissipation effect around the surfaces of the laminates.The lower the welding power,the more uniform the heating of the welding area,but the heating time will be extended.Under the optimized processing parameters of power of 600 and heating time of 300 s in vacuum bag,and intentionally placed thermal conduction plates above the top surface and along the lateral sides,the single lap shear strength of the part reaches 41.57 MPa.