连续纤维增强树脂增材制造技术为实现复合材料构件的快速、低成本、轻量化成形提供了新的途径，具有重要的理论研究与工程应用价值。该技术采用“熔融-堆积-固化”的方式制造复合材料构件，研究成形过程与打印结构性能及关键工艺参数对其影响规律具有重要价值，而相关研究仍不够深入。与此同时，打印结构孔隙率高、层间结合性能弱等问题同样制约着该技术的发展。针对上述背景，本文对打印结构关键成形过程及其影响因素、打印结构性能预测、打印结构增强工艺等方面深入、系统地研究，主要研究内容与创新性工作如下：（1）采用连续纤维增强树脂预浸丝材作为打印材料，研究了浸渍参数对预浸丝材浸渍质量的影响规律。研究打印过程中打印成形力的变化规律，揭示了成形力作用机制，建立了成形牵引力及压力与工艺参数的关系。（2）研究了连续纤维增强树脂打印结构成形过程温度场与热应力场的变化规律，运用“生死”单元技术，同时结合“宏-细-微”多尺度分析方法所得打印结构宏观力学性能与热物理性能参数，得到了打印层高、层厚、速度对温度场与热应力场的影响规律，并结合温度场测试实验验证方法的准确性。（3）为准确预测纤维增强树脂打印结构基本力学与热物理性能，根据打印结构周期性排列特征，建立了打印结构束间孔隙形状模型，对打印结构进行“宏-细-微”多尺度分析，研究了纤维含量、孔隙等因素对打印结构力学性能与热物理性能的影响规律，结合拉伸模量与热导率测试验证了该方法的准确性。（4）为有效解决连续纤维增强树脂打印结构层间强度弱与孔隙率高等问题，创新性研究了层间打印添加胶膜增强增韧工艺，分析了增韧胶膜与上下打印层结合界面的结构特征，揭示了增强增韧机理。增强增韧样件剪切强度与弯曲强度提升幅度达116%与15%，I型与Ⅱ型断裂韧性提升幅度达23%与32%。为进一步提高打印件密实度与强度，创新性研究了点阵式滚珠热压工艺方法，实现对打印件的精密高效热压。分析了点阵式滚珠热压原理与热压传热机制，同时研究了热压温度与热压力对打印结构力学性能的影响规律，通过热压增强，样件剪切强度与弯曲强度提升幅度分别达33%与45%，增强效果显著。（5）以典型结构件T型梁为对象，研究了打印层厚、间距对其弯曲性能的影响规律。采用声发射技术，对T型梁弯曲损伤过程及模式进行了聚类研究。同时研究了层间增强增韧工艺与点阵式热压工艺对T型梁弯曲性能的增强效果。

Continuous fibre-reinforced resin additive manufacturing technology provides a new way to achieve rapid, low-cost, lightweight moulding of composite components, which has important theoretical research and engineering application value. The technology adopts the "melt-stacking-curing" method to manufacture composite components, and it is valuable to study the influence of the moulding process on the properties of the printed structure and the key process parameters on it. The study of the moulding process and the properties of the printed structure and the influence of key process parameters on them is of great value, but the related research is still not deep enough. Meanwhile, the problems of high porosity and weak interlayer bonding of the printed structures also restrict the development of this technology. Against the above background, this paper carries out in-depth research on the key moulding process of printed structures and its influencing factors, the prediction of the performance of printed structures, and the reinforcement process of printed structures, etc. The main research contents and innovative work are as follows:(1) Adopting continuous fibre-reinforced resin prepreg filament as the printing material, the influence of impregnation parameters on the impregnation quality of prepreg filament is investigated. Research on the changing law of printing forming force in the printing process, revealing the mechanism of forming force, and establishing the relationship between forming traction force and pressure and process parameters.(2) The study of continuous fibre-reinforced resin printing structure molding process temperature field and thermal stress field change law, the use of "life and death" unit technology, combined with the "macro-fine-micro" multi-scale analysis method of the macro-mechanical properties of the structure and thermophysical performance parameters, obtained the printing layer height and the thermophysical properties of the structure. performance parameters, we obtained the printing layer height, layer thickness, speed on the temperature field and thermal stress field of the influence of the law, and combined with the temperature field test experiments to verify the accuracy of the method.(3) In order to accurately predict the basic mechanical and thermophysical properties of fiber-reinforced resin printed structures, an inter-bundle pore shape model is established based on the periodic arrangement characteristics of the printed structures, and a macro-fine-micro multi-scale analysis is carried out to study the effects of fiber content and pore space on the mechanical and thermophysical properties of the printed structures, combined with the temperature field test experiment to verify the accuracy of the method. The influence of fibre content, pore space and other factors on the mechanical and thermal properties of the printed structure was investigated, and the accuracy of the method was verified by combining the tensile modulus and thermal conductivity tests.(4) In order to solve the problems of weak interlayer strength and high porosity of continuous fibre-reinforced resin printed structures, we have innovatively researched the toughening process of adding adhesive film to the interlayer printing, analysed the structural characteristics of the interface between the toughened adhesive film and the upper and lower printed layers, and revealed the toughening mechanism of the adhesive film enhancement. The enhancement of shear strength and bending strength of the toughened samples increased by 116% and 15%, and the fracture toughness of type I and type II increased by 23% and 32%.In order to further improve the compactness and strength of the printed parts, a dot-matrix ball hot pressing process was innovatively studied to achieve precise and efficient hot pressing of the printed parts. The principle of dot-matrix ball hot pressing and the heat transfer mechanism of hot pressing were analysed, and the influence of hot pressing temperature and pressure on the mechanical properties of the printed structure was also studied. The shear strength and bending strength of the samples were enhanced by 33% and 45% respectively through the enhancement of hot pressing, and the enhancement effect was remarkable.(5) T-beams, a typical structural component, are taken as the object, and the influence of printing layer thickness and spacing on its bending performance is studied. Using acoustic emission technology, the bending damage process and mode of the T-beam were studied by clustering. At the same time, the enhancement effect of interlayer reinforcement toughening process and dot matrix hot pressing process on the bending performance of T-beams was studied.