LIU Wangzi, WANG Xinwen, LI Meng, GUAN Haixin, CHEN Zhengsheng. Research on Forming Technology of Narrow Flanging Skin Composite Material by Autoclave. Aeronautical Manufacturing Technology, 2017, 60(20): 79-83.
LIU Wangzi, WANG Xinwen, LI Meng, GUAN Haixin, CHEN Zhengsheng. Research on Forming Technology of Narrow Flanging Skin Composite Material by Autoclave. Aeronautical Manufacturing Technology, 2017, 60(20): 79-83. DOI: 10.16080/j.issn1671-833x.2017.20.079.
以窄腔翻边复合材料蒙皮为研究对象,采用热压罐成型工艺方法,根据零件结构形式,分析窄腔成型质量。结果表明:选取Invar 钢框架模成型,能够减少固化中热容带来的残余应力释放,减少零件变形;固化过程中,让树脂充分流动和浸润,满足孔隙率要求,成型后零件的孔隙率小于1.5%。零件外形分析结果表明:设计辅助芯模成型、固化复合材料翻边蒙皮操作的铺贴方向和铺贴手法,以及对零件进行预压实,能保证翻边处外形、轮廓度、R 角成型质量要求。利用温差补偿技术,探索升温速率对零件力学性能和树脂含量的影响。结果表明:最佳的升温速率为在玻璃化转变温度(T g)前保持0.5~1.5℃ /min,在玻璃化转变温度T g 至保温前选取升温速率为1.5~2.2℃ /min 至保温。
Abstract
In this paper
the narrow flanging skin composite part was studied and the technology of autoclave was adopted. According to analyzing the structure of the part
the result shows that selecting the Invar male frame tool to layup and curing the composite part
residual stress can be reduced because of the thermal capacity during the curing process as well as the deforming of the part. During the curing process
resin can sufficiently flow and soak so as to achieve the index of porosity. The porosity of the composite component is less than 1.5%. Based on the shape of the component
the result shows that designing the aid tool for layup and compaction
identifying the direction and technique of ply during layup
the outline of the flanging and the profile tolerance and the R shape can be guaranteed. Using the technology of the temperature compensation
we explore the effect of heating rate on the mechanical properties and resin content of the skin. The result shows that the best temperature rate is 0.5-1.5℃ /min before the glass-transition temperature (T g) of the prepreg
after T g until holding time the rate is 1.5-2.2℃ /min.