Friction stir welded bladder fuel tank

Details Friction stir welded bladder fuel tank Friction stir welded bladder fuel tank

2008-01-25

2011-12-20

Omgba, Essama (Department: 3726)

Metal working

Method of mechanical manufacture

Assembling or joining

C029S890010, C220S562000, C220S564000, C060S039480, C228S112100

Reexamination Certificate

active

08079126

ABSTRACT:
A method of fabricating a rolling bladder propellant tank assembly includes providing a pair of half-domes comprising a nanophase metallic material and a bladder formed of a ductile metallic material. A bladder support ring extends from at least one of the pair of half-domes. The pair of half-domes are positioned together to form a cavity therein with a portion of the bladder trapped between the pair of half-domes adjacent to the bladder support ring, wherein the bladder is positioned within the cavity. A seal is formed between the pair of half-domes and the bladder by friction stir welding. A friction stir welding pin used to form the seal is aligned with the bladder support ring during the friction stir welding operation.

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