【摘要】 针对3D打印层间方向力学性能较弱的问题，设计了一种空间路径复合3D打印结构，通过平面路径与空间路径的编织结构，提升了3D打印结构件的力学性能。为实现传统3D打印机构打印空间路径，基于机械臂3D打印工艺，通过截平面法生成多种填充角度的空间连续打印路径，并规划空间打印路径的喷头姿态，实现了空间路径复合3D打印结构的一体化制造。通过建立空间路径复合3D打印结构的本构及有限元分析模型与压缩试验，对空间路径填充角度对其抗压性能的影响进行了分析。结果表明，空间路径填充角度为90°和±45°的空间复合路径结构的比屈服载荷比无空间复合路径结构的试件分别提升了42.9%和16.5%,空间路径复合3D打印结构可以提升结构件的压缩性能，为提升3D打印结构件力学性能提供了新的思路。更多还原

【Abstract】 Aiming at the weak mechanical properties of 3D printing layers, a composite 3D printing structure with spatial paths is designed, and the mechanical properties of 3D printed structural parts are improved through the woven structure of plane paths and spatial paths. However, the traditional 3D printing mechanism cannot realize the printing of the space path. Based on the 3D printing process of the robotic arm, a continuous space printing path with various filling angles is generated by the section plane method, the nozzle posture of the space printing path is planned, and the space path composite 3D printing is realized. By establishing the constitutive and finite element analysis model and compression test of the composite 3D printing structure of the space path, the influence of the filling angle of the space path on its compressive performance is analyzed. The results show that the specific yield load of the spatial composite path structure with the spatial path filling angle of 90° and ±45° is increased by 42.9% and 16.5% respectively. Compared with the specimen without the spatial composite path structure, the spatial path composite 3D printing structure can improve the structure. The compression performance of the parts provides a new idea for improving the mechanical properties of 3D printed structural parts.更多还原