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Manufacturing of a composite wing with internal structure in one cure cycle

机译：在一个固化周期内制造具有内部结构的复合材料机翼

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摘要

The need for faster and more accurate manufacturing methods for composite parts continues to grow. Co-curing composite structures can decrease manufacturing time by eliminating secondary operations such as grinding, jigging, bonding, and fastening while creating lighter and more accurate parts. As a demonstrator for co-curing techniques, a six-meter carbon fiber wing for a high-altitude and high-speed dynamically soaring unmanned aerial vehicle (UAV) was designed and manufactured in one cure cycle. Two wing-skin molds were created using low density tooling board, with the mold geometry directly machined into the material, reducing tool manufacturing time and cost. An aluminum insert was used to create a trailing edge cavity while maintaining a simple parting line of the wing tool. Three removable forms made of polystyrene foam inside of the wing cavity were used to position six internal webs and, after curing and removal of the forms, resulted in a hollow wing with internal webs. The resulting wings showed some defects in the wing skins but overall produced structurally sound parts. The method shows great potential for creating complex composite parts using only a single cure cycle with little finishing work and no secondary bonding, resulting in high precision at a relatively low cost.
机译：对复合零件的更快，更准确的制造方法的需求不断增长。共固化复合结构可通过消除诸如打磨，夹具，粘合和紧固之类的次要操作来减少制造时间，同时还能制造出更轻，更精确的零件。作为共硫化技术的演示者，在一个硫化循环中设计并制造了一种用于高空高速动态高升无人机的六米碳纤维机翼。使用低密度工装板创建了两个机翼蒙皮模具，并将模具几何形状直接加工到材料中，从而减少了模具制造时间和成本。在保持翼型工具的简单分型线的同时，使用铝制插入物创建后缘型腔。在机翼腔内使用三种由聚苯乙烯泡沫制成的可拆卸模板来放置六个内部腹板，在固化和移除模板之后，形成了带有内部腹板的中空机翼。所得机翼在机翼蒙皮上显示出一些缺陷，但总体上产生了结构合理的零件。该方法显示出仅使用单个固化周期即可完成复杂的复合零件的巨大潜力，几乎不需要精加工，并且无需二次粘合，从而以相对较低的成本实现了高精度。

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  • 来源
    《Composite Structures》 |2018年第12期|601-609|共9页
  • 作者

    Patterson Jacob B.; Grenestedt Joachim L.;

  • 作者单位

    Lehigh Univ, 19 Mem Dr W, Bethlehem, PA 18015 USA;

    Lehigh Univ, 19 Mem Dr W, Bethlehem, PA 18015 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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