商用飞机复合材料双面加筋壁板制造技术研究

Study on Manufacturing Technology of Double-sided Stiffened Panel of Commercial Aircraft

本文以层间增韧环氧树脂碳纤维单向带及织物预浸料为原料,采用手工铺叠的方式制造双面加筋壁板,首先利用热压罐共固化蒙皮及单面长桁,然后采用胶接共固化的方式制造双面加筋壁板,通过利用成型模工装上的凹槽限制筋条轴线位置,解决了壁板轴线偏移问题,将轴线精度由以往的±2mm提升至±0.3mm;通过采用金属工装及筒状真空袋的组合成型方式,解决了传统金属工装传压不均的问题,有效提升了零件的固化质量;通过开发一种特殊形状的特氟龙斜块解决了该类形式工装的零件脱模难题。最终制造出相关性能指标优于现行技术要求的合格零件,该零件的制造过程及检测指标符合设计的意图,零件的外形尺寸及轴线精度能够满足装配的需求。

The paper uses interlaminar toughened epoxy preimpregnated carbon fiber tapes and fabrics as raw material. The double-sided stiffened panel is manufactured by manual lay-up. Firstly, autoclave is used to co-cure skin and one side stringers. Then co-bonding the part with another side stringers to form a final double-sided stiffened panel. By limiting the position of the stringers with molding tool, the problem of the axis deviation of the panel is solved. Axis accuracy has been improved from ±2 mm to ±0.3 mm;By adopting the combination of metal tooling and cylinder vacuum bag, the problem of uneven transfer pressure of metal tooling is solved, and the curing quality of parts is effectively improved;By developing a special shaped Teflon inclined block, the demoulding problem of this kind of tooling and parts is solved. Finally, the relevant performance indicators are better than the current technical requirements of qualified part. The manufacturing process and testing index of part is in line with the design intention, and the dimensions and axis precision of the part can meet the requirements of the assembly.