Metal working – Method of mechanical manufacture – Structural member making
Patent
1996-09-27
1999-03-16
Sewell, Paul T.
Metal working
Method of mechanical manufacture
Structural member making
294211, 5278415, 72 61, 228190, B23P 1700, E04C 232, B21D 2210, B23K 3102
Patent
active
058814590
ABSTRACT:
The method of forming SPF/DB structures having reinforcement webs that are constructed by welding two or more sheets together along an interrupted seam and placing the core so formed between two face sheets, expanding the face sheets into a die by providing pressurized inert gas through one of the face sheets and through a pressure equalization hole drilled through a sealed area formed by the seam, and using pressurized inert gas to expand the core sheets into webs that extend between the face sheets.
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McDonnell Douglas Corporation
Mohandesi Jila
Sewell Paul T.
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