Metal deforming – By application of fluent medium – or energy field – Using fixed die
Patent
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.
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patent: 5309747 (1994-05-01), Yasui
Jones David
McDonnell Douglas Corporation
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