为提升3D 打印零件的综合性能与成形质量,提出了一项连续碳纤维复合材料曲面随形五轴3D 打印工艺.通过自主设计搭建的五轴双喷头3D 打印平台和打印路径规划,以连续碳纤维为增强材料,聚乳酸(polylactic acid,PLA)为基质材料,聚乙烯醇(polyvinyl alcohol PVA)为支撑材料,打印了碳纤维夹层结构形式的典型样件和曲面样件.对打印出的典型样件和曲面样件进行了力学性能测试,并与无夹层结构形式的样件进行了对比.结果表明:采用该工艺所打印的典型样件和曲面样件的力学性能及表面质量均得到了增强.这证明通过五轴双喷头3D打印平台实现的连续碳纤维复合材料曲面随形五轴3D 打印工艺,能够有效提升3D 打印零件的综合性能与成形质量.
To enhance the comprehensive performance and forming quality of 3D printed parts, a conformal five-axis 3D printing process was proposed for continuous carbon fiber reinforced composites on curved surfaces. Utilizing a self-designed and constructed five-axis dual-nozzle 3D printing platform and print path planning, typical specimens with a sandwich structure format and curved surface specimens were printed using continuous carbon fiber as the reinforcement material, polylactic acid (PLA) as the matrix material, and polyvinyl alcohol (PVA) as the support material. Mechanical performance tests were conducted on the printed typical specimens and curved surface specimens, and comparisons were made with specimens lacking the sandwich structure format. The experimental results indicated that both the mechanical properties and surface quality of the typical specimens and curved surface specimens printed using this process were enhanced. In conclusion, it is demonstrated that the conformal five-axis 3D printing process for continuous carbon fiber reinforced composites, realized through this five-axis dual-nozzle printing platform, could effectively improve the comprehensive performance and forming quality of 3D printed parts.
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