| 摘要 |
<p>A method of superplastic forming at least two superplastically formable metal workpieces (34, 35) comprises producing a die (10) having a face (22) contoured to a predetermined shape. The superplastically formable metal workpieces (34, 35) are placed on the face (22) of the die (10) and another metal workpiece (36, 38 and 40) is placed on the remaining faces (24, 26, 28, 30, 32 and 34) of the die (10). The edges of at least one of the superplastically formable metal workpieces (34, 35) are sealed (42) to the edges of the other metal workpieces (36, 38 and 40) to form a sealed assembly (46) such that the metal workpiece (35) and the die (10) are enclosed by the sealed assembly (46). The interior of the sealed assembly (46) is evacuated and the sealed assembly (46) is placed in a pressure vessel. Sufficient heat and pressure is applied to the interior of the pressure vessel to superplastically form the superplastically formable metal workpieces (34, 35) at isostatic pressure to the predetermined shape of the face (22) of the die (10) and to diffusion bond the metal workpieces (34, 35) together. The superplastically formed metal workpiece (34) and the other metal workpieces (36, 38 and 40) are removed from the die (10).</p> |
