| 摘要 |
PURPOSE:To enable the superplastic press forming without using an exclusive equipment by loading a fluid pressure via the thin film transmitting the pressure and by performing the press forming by driving the forming die with deforming the thin film. CONSTITUTION:A sample material 1 and the superplastic plate 5 for pressure transmission are heated upto the superplastic temp. by a heating plate 9 and perform the support of a gas pressure seal and the periphery of the sample material 1 by loading the press pressure. The sample material 1 is then subjected to a press forming by driving to the lower part the superplastic plate 5 with its plastic deformation simultaneously with the action of the gas pressure on the upper die 2 via the superplastic plate 5 when the gas pressure is loaded from a gas leading-in port 6. The material may be those which show a superplasticity in the same temp. range as the sample material 1 even in case of being not the superplastic plate 5 of the same kind as the sample material 1. An elastic deformation may be utilized by employing a rubber, etc. for the pressure transmitting plate, which may be formed in an bag shape. The driving die may be by either upper die 2 or lower die 3 or the both. A liquid pressure may be used for the pressure in place for the gaseous pressure.
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