热塑性复合材料自动铺放过程中红外加热技术研究

doi:10.11868/j.issn.1001-4381.2017.000346

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摘要

为保证热塑性预浸料树脂基体在自动铺放（automated fiber placement，AFP）过程中充分熔融，实现热塑性复合材料（thermoplastic composites，TPC）逐层"原位固结"成型，自动铺放成型过程中需精确控制预浸料的加热温度。针对自动铺放过程中铺放速率会在较大范围内变动的特点，本工作提出一种高速率响应的红外线辐射加热技术。通过对红外热源与铺层间能量传输过程的分析，提出红外加热过程中动态恒温控制方程，建立热源辐射强度与铺放速率之间的匹配关系。基于热塑性复合材料自动铺放实验平台，构建红外加热恒温控制系统，该系统采用前馈控制方式，根据动态恒温控制方程，制定相应控制策略，实现对预浸料加热过程中温度的精确控制。实验结果表明自动铺放过程中使用红外加热恒温控制系统满足变速工况下恒温加热要求，且铺放成型实验件的压缩强度及层间剪切强度均接近模压成型实验件。

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	宋清华
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	陈吉平

关键词 ：热塑性复合材料, 自动铺放, 红外加热, 前馈控制, 原位固结

Abstract：

In order to ensure the full melting of the thermoplastic composites (TPC) prepreg in the process of automated fiber placement (AFP) and offer the potential to realize the in-situ consolidation for TPC, it is necessary to control the temperature of the prepreg in AFP. Aiming at the processing speed will be changed within the larger scope, an infrared heating technology with fast response rate and efficient was proposed. Based on the analysis of the heat transfer process between the infrared heat source and the layers, the control equation of dynamic temperature was put forward and the matching relationship between the radiation intensity and laying speed was established. Based on the AFP platform, the infrared heating system which adopts the feedforward control method was constructed and the corresponding control strategy was formulated according to the dynamic thermostatic control equation to realize the heating temperature of prepreg controlled accurately. The experiment results show that the infrared heating thermostatic control system can meet the requirement of dynamic thermostatic control in the condition of variable speed and the compressive strength and the interlaminar shear strength for AFP component are closed to the moulded component.

Key words： thermoplastic composites automated fiber placement infrared heating feedforward control in-situ consolidation

收稿日期: 2017-03-06 出版日期: 2019-01-16

中图分类号:	TB332
	V261

基金资助:上海飞机制造有限公司创新基金(F-CXKT-0155);上海自然科学基金(17ZR14118001)

通讯作者: 宋清华 E-mail: songqinghua@comac.cc

作者简介: 宋清华(1987-), 男, 博士后, 研究方向:连续纤维增强热塑性复合材料自动铺放原位成型技术, 联系地址:上海市浦东新区祝桥镇上飞路919号上海飞机制造有限公司(201324), E-mail:songqinghua@comac.cc

引用本文:

宋清华, 刘卫平, 肖军, 陈萍, 杨洋, 陈吉平. 热塑性复合材料自动铺放过程中红外加热技术研究[J]. 材料工程, 2019, 47(1): 77-83.
Qing-hua SONG, Wei-ping LIU, Jun XIAO, Ping CHEN, Yang YANG, Ji-ping CHEN. Infrared heating system based on automated fiber placement for thermoplastic composites. Journal of Materials Engineering, 2019, 47(1): 77-83.

链接本文:

http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2017.000346 或 http://jme.biam.ac.cn/CN/Y2019/V47/I1/77

Fig.1 自动铺放红外加热系统示意图

Fig.2 管式红外灯结构图

Fig.3 红外加热控制系统原理图

Fig.4 编码器测速示意图

Fig.5 加热功率与输入电压的关系

Fig.6 热塑性复合材料自动铺放红外加热系统
(a)热塑性复合材料自动铺放实验平台; (b)红外加热控制系统

Fig.7 温度采集系统原理图

Fig.8 控制系数与黏合点温度的关系曲线

Fig.9 红外加热温度采集过程

Fig.10 热电偶峰值温度显示

Fig.11 不同铺放速率下热电偶峰值温度

Fig.12 热成像仪测量铺放过程中黏合区域的温度

Fig.13 自动铺放成型玻璃纤维增强聚丙烯复合材料平板实验件

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