徐竹 王世峰

摘      要：以某武装直升机S型环控管道为研究对象，选用具有阻燃特性的碳纤维复合材料预浸料，采用充气芯模+阴模特殊结构的成型模具完成制造工艺试验。试验中充气芯模采用充气袋，外形为复合材料制件的内腔体形状，金属阴模结构为框架式模具，分为上、下模两部分，铺层方案采用管道整体铺层和翻边部分铺层两部分完成。试验过程中铺层完成后在铺层内腔放置充气芯模，然后连接气源装置进行充气，经过反复充气试验后，最优化的气压大小为2.5 MPa。合模后的装置加压调整好后采用烘箱固化，在烘箱中缓慢升温至125 ℃保温2 h固化得到制品。本试验所得S型环控弯管表面光顺、法兰边缘整齐，厚度符合图纸要求，整体尺寸公差符合要求。用存水的方法检验S型环控弯管的密封性，结果显示没有漏水、渗水现象。

关  键  词：S型环控管道; 碳纤维; 复合材料; 充气芯模; 制造

中图分类号：TQ050.4+3       文献标识码： A       文章编号： 1671-0460（2020）04-0584-04

Abstract： Taking the S-type environmental control pipeline of an armed helicopter as the research object， the carbon fiber composite prepreg with flame retardant characteristics was chosen， and the manufacturing process test was completed with the special structure of inflatable core mould and negative mould. In the experiment， the pneumatic core mould was made of pneumatic bag， which was shaped as the inner cavity of composite parts. The metal negative mould structure was a frame mould， which was divided into upper and lower parts. The laying scheme was completed by integral laying of pipeline and flanging laying of part. In the course of the test， the pneumatic core mould was placed in the inner chamber of the pavement after the completion of the pavement， and then connected with the air source device for aeration. After repeated aeration tests， the optimum air pressure was determined as 2.5 MPa. After adjusting the pressure of the device after closing， the product was cured in oven， and the product was cured by heating slowly up to 125 ℃ for 2 h. The surface of S-type environmental control elbow is smooth， the flange edge is neat， the thickness meets the requirements of the drawings， and the overall dimension tolerance meets the requirements. The sealing property of S-type environmental control elbow was tested by water storage method. The results showed that there was no leakage or seepage.

Key words： S-type environmental control pipeline; Carbon fiber; Composite material; Inflatable core mould; Manufacturing

近年来， 复合材料在航空航天、交通运输等领域的应用优势日渐明显。环境控制系统（Environme -ntal Control System，ECS）作为飞机不可或缺的一部分， 除了给飞行人员和乘客提供舒适安全的环境外，更重要的是能够为飞机上的仪器和仪表提供优越的环境， 保证仪器仪表精确有效的工作[1-3]。在直升机环控弯管[2]中使用先进复合材料使结构部件变得更轻、更耐用，特别是大型整体结构部件，减少了大量的零部件连接和装配工作，降低了过程成本。本文围绕典型直升机环控弯管为研究对象，按照GJB2895-1997 《碳纤维复合材料层合板和层合件通用规范》完成碳纖维复合材料制造过程所有工艺及检测试验。……