Friction stir welding method
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United States of America Patent
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Aug 24, 2004
Issued Date -
N/A
app pub date -
Jan 30, 2002
filing date -
Aug 24, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A rim member 120 forming an entrance 110 and a plate 11 (21) are friction stir welded by moving a rotary tool 200 along the rim member 120. The rotary tool 120 is tilted along the direction of movement. Welding is started at right block 120R, and when the tool reaches corner portion P5 between the right block 120R and a center block 120C, the tool 200 is pulled out of the rim member 120 and plate 11 (21). Next, the tool is tilted toward the direction of movement along center block 120C. Thereafter, the tool is lowered and inserted to position, and friction stir welding is restarted. According to the invention, the direction of the rotary tool is not changed while the tool is inserted to the rim member 120. This prevents generation of excessive friction heat, and thereby realizes a good weld.
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Cited Art Landscape
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