Nomex蜂窝夹层复合材料的自动铺丝成型工艺研究

摘要

The honeycomb sandwich structure composite material is formed by automated fiber placement technol-ogy, lateral pressure deformation of honeycomb core and prepreg fiber bridging are defects, the formation mechanism and influencing factors of them are analyzed. Design concave molding tooling for two kinds of molding process, adhesive film pre-bonding process and taws zero-tension technique have been proposed to avoid defects. Completing the laying of the flatbed honeycomb sandwich, comparing the parts after curing: its cannot avoid the prepreg fiber bridging use concave module, and bridging position appears stratified, lack of resin defect; convex module is more suitable. The results can pro-vide the reference for forming complex honeycomb sandwich structure composite material.%采用自动铺丝技术成型蜂窝夹层结构复合材料,其可能产生的缺陷为蜂窝芯侧压变形和预浸丝架桥,分析了二者的形成机理和影响因素.为验证两种成型工艺,设计了阴模成型工装,提出了胶膜预黏接工艺和局部零张力铺放作为缺陷解决方案,对平板蜂窝夹层进行实际铺放验证.对比固化后的制件:对于斜削角度较大的蜂窝,阳模成型不能消除架桥;丝束架桥导致最终制件相应位置出现分层、缺胶缺陷;阴模工装有效避免了蜂窝侧压变形和丝束架桥,更适合自动铺丝成型.可为复杂型面蜂窝夹层构件的自动铺丝成型提供参考.