摘要:
基于热塑性复合材料(TPC)自动纤维铺放(AFP)原位固结技术, 开展热塑性复合材料AFP装备技术研究, 分析AFP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AFP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; 实验平台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; 建立了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AFP成型构件的力学性能比热模压成型构件的力学性能低约20%, 但为热塑性复合材料AFP装备技术的广泛应用奠定了基础。
Abstract:
Based on the automated fiber placement(AFP)in-situ curing technology of thermoplastic composite (TPC), we researched AFP system technology of thermoplastic composites, analyzed the functional requirements of AFP platform, proposed the overall planning scheme of platform, designed and developed the automatic prototype head of thermoplastic composites, meanwhile, proposed the schemes of tension control for prepreg, precise sending prepreg and closed-loop control for temperature. On this basis, feasibility verification experiments for the AFP system have been carried out to testify feasibility of the planning scheme and practical value of the platform. The results show that the experimental platform optimizes the matching of tension and laying speed, realizes the dynamic constant tension laying of prepreg and ensures the quality of the molding component according to the laying characteristics of thermoplastic composites. The experimental platform regulates the coordination of laying speed and sending prepreg to achieve precise positioning and security molding component size. The relationship between laying speed, heat power and heat flux distribution was established to realize high precision temperature field distribution control. Although the mechanical properties for AFP molding component are lower than those of hot moulded component, the AFP platform will lay foundation for wide use of AFP system technology in thermoplastic composites.
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