Method for determining the proper progress of a superplastic for

Details Method for determining the proper progress of a superplastic for Method for determining the proper progress of a superplastic for

1996-09-27

1997-11-25

Jones, David

Metal deforming

By application of fluent medium, or energy field

Using fixed die

72 201, 723422, 72709, B21D 2602

Patent

active

056899874

ABSTRACT:
A method and apparatus for determining the progress of a superplastic formation process that uses cumulative gas-mass outflow from a forming part being formed from generally one or more sheets of superplastically formable material, a process that may include selective diffusion bonding of the sheets together. The method includes using the expected initial conditions of the process to determine the gas-mass cumulative exhaust at room temperature and pressure. The method is advantageous over inlet measuring methods where high pressure gas must be measured and any small hole in the system results in large errors.

REFERENCES:
patent: 4217397 (1980-08-01), Hayase et al.
patent: 4233831 (1980-11-01), Hamilton et al.
patent: 4708008 (1987-11-01), Yasui et al.
patent: 4901552 (1990-02-01), Ginty et al.
patent: 5129248 (1992-07-01), Yasui
patent: 5309747 (1994-05-01), Yasui

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