温度对预浸料铺放效果的影响

Influence of Temperature on Placement Effect of Prepreg

为了有效控制自动铺带成型工艺参数,针对自动铺带成型工艺过程,分析了自动铺带成型过程中温度对预浸料铺放效果的影响。在一定的压力和速度作用下,根据温度对自动铺带过程中预浸料基体流动性的影响,提出了一种基于热弹性理论来计算预浸料形变的方法。针对预浸料的铺覆性和形变进行自动铺放试验,验证了在自动铺带过程中温度对预浸料黏附性和带宽变形均有影响:预浸料黏附性随着温度的升高先增大后减小,而预测浸料带宽随着温度的升高和基体流动性的增大而越来越大。从而证明了热弹性理论计算预浸料形变的正确性和可行性,为自动铺带成型工艺参数提供了理论依据。最后,总结分析温度对预浸料铺放质量的影响,为实际产品成型工艺提供参考。

Based on the analysis of automatic tape laying （ATL） process, this paper introduces temperature in the process of ATL, aiming at bettering the control of ATL. Under a certain pressure and velocity, this paper proposes a theoretical calculation based on thermal elastic deformation to predict prepreg deformation, according to the influence of temperature on fluidity of prepreg in the process of ATL. Then through ATL experiment on the coverage and deformation of prepreg, it is found that the temperature affects both the adherence and bandwidth of prepreg. With the increase of temperature, adher- ence of prepreg increases first and then decreases, while the bandwidth keeps increasing with the increase of temperature and fluidity of prepreg. This proves the correctness and feasibility of the proposed method and provides a theoretical basis for parameters of ATL process. Finally, the influence of temperature on the placement quality of prepreg is analyzed to better the control of ATL, which provides a reference for the actual molding process.