Expandable mandrel for use in friction stir welding

Details Expandable mandrel for use in friction stir welding Expandable mandrel for use in friction stir welding

2010-01-26

2011-11-15

Ward, Jessica L (Department: 1735)

Metal fusion bonding

Seam backup means

C228S044500, C228S049300, C072S462000, C072S466000

Reexamination Certificate

active

08056797

ABSTRACT:
A mandrel that provides a counter-force to the pressure exerted on the outside of a pipe or other arcuate surface by a friction stir welding tool, wherein the mandrel is expandable through the use of a wedge, and wherein the mandrel enables multiple friction stir welding heads to simultaneously perform welding on the arcuate surface.

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