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    • 3. 发明授权
    • Joining of composite materials by induction heating
    • 通过感应加热连接复合材料
    • US5240542A
    • 1993-08-31
    • US579379
    • 1990-09-06
    • Alan K. MillerWendy Lin
    • Alan K. MillerWendy Lin
    • B23K13/01B29C65/00B29C65/36
    • B29C66/836B23K13/015B29C65/3616B29C65/3684B29C65/3696B29C66/3474B29C66/349B29C66/721B29C66/7212B29C66/72141B29C66/81261B29C66/81262B29C66/81811B29C65/3668B29C66/71B29C66/7392B29C66/7394B29C66/8122B29L2031/3076B29L2031/3085
    • Two pieces of composite material are simultaneously joined together throughout an interface between the two pieces, by induction heating the interface region with an induction coil placed, at least in part, adjacent to the bonding region, and forcing the composite material at the interface together while heating. The approach is particularly useful in joining pieces having "long interfaces" whose longitudinal dimension is substantially larger than its transverse dimension, for example the long interfaces between aircraft wing stiffeners and skins. The induction coil is configured so that, at any one longitudinal location along the interface, the primary current flowing therethrough does not flow in opposite directions in the portions of the coil overlying the interface, and preferably flows in substantially the same direction throughout the interface. Unheated "cold spots" in the interface being bonded, which would not bond properly, are thereby avoided. An electrically nonconductive but thermally conductive material may be placed between the induction coil and the composite material pieces to act as both a heat sink and a pressure-applying tool. Bonding may be enhanced by placing a susceptor made of the same materials as the composite materials being bonded but having a higher electrical conductivity, in the interface between the two composite material pieces prior to induction heating.
    • 两片复合材料同时通过两片之间的界面连接在一起,通过感应加热该界面区域,该感应线圈至少部分地放置在与接合区域相邻的感应线圈上,并且将该界面处的复合材料强制加在一起,同时 加热。 该方法在连接具有纵向尺寸基本上大于其横向尺寸的“长接口”的部件中是特别有用的,例如飞机机翼加强件和皮肤之间的长接口。 感应线圈构造成使得在沿着界面的任何一个纵向位置处,流过其中的一次电流不会在覆盖界面的线圈的部分中沿相反方向流动,并且优选地在整个界面上沿基本相同的方向流动。 因此避免了不能正确粘合的界面中未加热的“冷点”。 可以在感应线圈和复合材料片之间放置不导电但导热材料,以充当散热器和压力施加工具。 通过在感应加热之前在两个复合材料片之间的界面中放置由与待结合的复合材料相同的材料制成的基座,但具有较高的导电性,可以增强接合。
    • 4. 发明授权
    • Apparatus for forming fiber composite materials
    • 纤维复合材料成型装置
    • US4955803A
    • 1990-09-11
    • US259256
    • 1988-10-18
    • Alan K. MillerKarthik RamaniMicha M. Gur
    • Alan K. MillerKarthik RamaniMicha M. Gur
    • B29C53/04
    • B29C53/043B29K2105/06
    • An apparatus for continuously and progressively forming components from fiber-containing composite material workpieces having a deformable matrix introduces transverse bends into a workpiece that moves through the apparatus in a longitudinal or travel direction. Transverse bending of the composite material is accomplished in a kinematically admissible manner to avoid misalignment or failure of the composite material. A net bending deformation is introduced at a free transverse edge as the composite workpiece moves in a longitudinal direction, by pairs of compound roller elements between which the workpiece passes as it moves through the apparatus. the net deformation introduced at the free transverse edge is moved and distributed through the composite material workpiece during successive passes through the forming machinery, to form the final shaped component.
    • 用于连续地逐渐形成具有可变形矩阵的含纤维复合材料工件的部件的装置将横向弯曲部引入沿着纵向或行进方向移动通过装置的工件。 复合材料的横向弯曲是以运动学上允许的方式实现的,以避免复合材料的错位或失效。 当复合材料工件沿纵向方向移动时,通过成对的复合辊元件在自由横向边缘处引入网弯曲变形,当复合工件移动通过设备时,该复合辊元件之间通过。 在自由横向边缘处引入的净变形在连续通过成型机械过程中通过复合材料工件移动并分布,以形成最终成形部件。