自动铺带中红外加热技术研究

为保证复合材料预浸带始终处于适宜铺放成型的工艺窗口内,自动铺带( ATL)成型过程中需要对预浸带的铺放温度进行精确控制.为适应高速率自动铺放,需要研究新的高效加热及精确控制方法.本文提出高加热效率、高响应速率的红外辐射加热方案.通过对红外热源与预浸带能量传输过程的分析,提出了红外加热过程中各传递系数的计算方法和公式.基...

Study of Infrared Heating Technology in Automatic Tape-Laying

In order to guarantee that a composite prepreg stay in a suitable process window for laying at any time, it is necessary to control the temperature of the prepreg accurately in automated tape-laying(ATL). High speed ATL process calls for a study of new efficienct heating manners and accurate control methods. This paper proposes an infrared heating method which is efficienct, and demonstrates a fast response rate. By analyzing the power transfer between the infrared heat source and the prepreg, the paper proposes calculation methods and equations about the transfer coefficients in the infrared heating process. Based on an analysis of the transfer coefficients, it establishes the temperature controlling equations of infrared heating for both the cases when the prepreg stays stationary and is moving, and through a comparision of the equations under the two different states, the paper proposes a concept of infrared radiation heating: the radiative ratio under steady state. By making use of the experimental data under the steady stationary state and the concept of the radiative ratio under steady state, and through theoretical deduction, the paper obtains the temperature controlling rule under a uniform motion running state. This may serve as a foundation for the application of infrared heating to ATL.