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    • 2. 发明授权
    • Method for superplastically forming a structural article
    • 用于超塑性地形成结构制品的方法
    • US5890285A
    • 1999-04-06
    • US702288
    • 1996-08-23
    • Mark O. PruittChristopher A. Ross
    • Mark O. PruittChristopher A. Ross
    • B21D26/055B23P15/00
    • B21D26/055Y10T29/49339Y10T29/49622Y10T29/49623
    • A method for forming a hollow structure having a predetermined shape from a sheet of superplastic material. The sheet is initially formed into a preform configuration. A reusable fluid inlet tube is placed in the preform configuration to define a port in fluid communication with the interior portion of the preform configuration. The preform configuration is disposed in a containment die, which defines a cavity having the predetermined desired shape. Force is applied to the containment die to temporarily seal the edges of the preform configuration without the use of welding or diffusion bonding. Once its edges are sealed, the preform configuration becomes a gas-tight envelope capable of holding fluid that is introduced through the fluid inlet tube. Fluid (e.g., argon) is fed through the tube to apply internal pressure to the gas-tight preform configuration under superplastic conditions (including appropriate heating) while it is still being held in the containment die so that it superplastically expands in the die cavity (deforms) into a hollow structure having the predetermined shape. The hollow structure may be an aeronautical member, e.g., an airfoil, or a member used in automobiles, furniture, boats, buildings, railroad cars, hospital equipment, architectural panels, or any other application requiring a closed metal shape.
    • 一种从超塑性材料片形成具有预定形状的中空结构的方法。 片材最初形成为预成型件构型。 可重复使用的流体入口管被放置在预成型件构造中以限定与预成型件构型的内部部分流体连通的端口。 预成型件构造设置在容纳模具中,其限定具有预定所需形状的空腔。 将力施加到容纳模具上以临时密封预成型件构造的边缘,而不使用焊接或扩散粘合。 一旦其边缘被密封,则预成型件构型变成能够保持通过流体入口管引入的流体的气密外壳。 在超塑性条件(包括适当的加热)下,流体(例如氩气)通过管进料,以将其在气泡密封的预制件构型上施加内部压力,同时其仍被保持在容纳模具中,使得其在模腔中超塑性膨胀 变形)成具有预定形状的中空结构。 中空结构可以是航空构件,例如机翼,或者用于汽车,家具,船,建筑物,铁路车辆,医院设备,建筑面板或需要闭合金属形状的任何其它应用中的构件。