Friction stir weld repair

Details Friction stir weld repair Friction stir weld repair

2007-10-16

2007-10-16

Johnson, Jonathan (Department: 1725)

Envelopes, wrappers, and paperboard boxes

Paperboard box

Including a polygonal, nonrectangular wall

C228S002100, C228S119000

Reexamination Certificate

active

10875106

ABSTRACT:
A method of repairing a discrepancy in a casting, weldment or other workpiece comprised of a material characterized by thermoplastic properties includes excising the discrepancy by cutting, milling, or otherwise removing workpiece material surrounding the discrepancy so as to remove the discrepancy and form a cylindrical hole in the workpiece. The method further includes placing a cylindrical plug in the cylindrical hole and moving a friction stir welding tool around the circumference of the plug to weld the plug to the workpiece.

REFERENCES:
patent: 3487530 (1970-01-01), Ely
patent: 5460317 (1995-10-01), Thomas et al.
patent: 5971252 (1999-10-01), Rosen et al.
patent: 5975406 (1999-11-01), Mahoney et al.
patent: 6638641 (2003-10-01), Delano
patent: 2003/0217452 (2003-11-01), Talwar et al.

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