Friction stir welding total penetration technique
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United States of America Patent
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Mar 18, 1997
Grant Date -
N/A
app pub date -
Feb 20, 1996
filing date -
Feb 20, 1996
priority date (Note) -
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Abstract
A method for ensuring complete penetration of a friction stir weld using a rotating pin friction stir welding tool comprising chamfering the bottom of the plates to be welded along the faying edges. Placing the plates on a back up plate. Inserting the pin friction stir welding tool into the plates to the depth of the chamfer and translating it along the faying surface to plasticize the material in the plates. The plasticized material will flow into the volume defined by of the chamfer at the bottom of the plates and the back up plate. A visual inspection will show if the weld penetrated fully through the plates if the chamfered volume is filled with material which flowed in while plasticized.
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