Multiple density sandwich structures and method of fabrication

Details Multiple density sandwich structures and method of fabrication Multiple density sandwich structures and method of fabrication

1991-12-17

1994-07-19

Bradley, Paula A.

Metal fusion bonding

Process

With shaping

228181, 2988972, 72709, B23K 2802, E04C 232

Patent

active

053300920

ABSTRACT:
A method to superplastic form sandwich structures is provided. A series of worksheets are joined together at selected locations through the use of partial penetration welding. The worksheets are subsequently superplastic formed in order to form a sandwich structure. The method allows a different number of worksheets to be used at different points throughout the sandwich structure. This results in a sandwich structure with a different internal reinforcement at different locations in the sandwich structure. In the preferred embodiment, a wing is fabricated from a series of worksheets partial penetration welded together using a laser. The worksheets are superplastic formed to producing a wing with a different internal reinforcement at two or more locations in the wing.

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