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以热塑性复合材料(Thermoplastic composite,TPC)自动铺放技术(Automated Fiber Placement,AFP)为研究背景,开展热塑性复合材料自动铺放设备研究,分析自动铺放平台的功能需求,提出平台总体规划方案,设计开发热塑性复合材料自动铺丝头,并提出预浸纱张力控制方案、精确送纱及温度闭环控制方案.在此基础上,设计自动铺放系统可行性验证实验,证明方案的可行性和平台的实用价值.结果表明本实验平台针对热塑性复合材料铺放特点,优化张力与铺放速度匹配,实现预浸纱动态恒张力铺放,确保成型构件质量;调控铺放速度与送纱协调,实现精确定位、保障成型构件尺寸;建立铺放速度与加热功率、热流分布关系,实现高精度温度场分布控制.虽铺放成型构件的力学性能比热模压成型构件的性能低约20%,但为热塑性复合材料自动铺放技术的广泛应用奠定了基础.
Based on the background of thermoplastic polymeric material (TPC) Automated Fiber Placement (AFP), the research on the automatic placement equipment for thermoplastic composites was carried out. The functional requirements of the automatic placement platform were analyzed. The overall plan of the platform, Design and develop the thermoplastic composite material automatic paving head and put forward the pre-dip yarn tension control scheme, the precise yarn feeding and the temperature closed-loop control scheme.On this basis, the feasibility test of automatic placement system is designed to prove the feasibility and platform of the scheme The results show that the experimental platform for the thermoplastic composite material placement characteristics, optimizing tension and laying speed matching, pre-impregnated yarn to achieve dynamic constant tension laying, to ensure the quality of molded parts; control the laying speed and yarn-feeding coordination, to achieve Precisely positioning and ensuring the size of the molded component, and establishing the relationship between deposition speed, heating power and heat flow distribution, and controlling the distribution of temperature field with high precision. Although the mechanical properties of laying component is about 20% lower than those of hot- Thermoplastic composite automatic placement technology laid the foundation for a wide range of applications.