MULTI-SECTION FACED SHOULDERLESS RETRACTABLE VARIABLE PENETRATION FRICTION STIR WELDING TOOL
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United States of America Patent
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app pub date -
Jun 26, 2008
filing date -
Oct 22, 2004
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Abandoned
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Abstract
A method of friction stir welding and a non-consumable multi-section faced retractable shoulderless variable penetration friction stir welding tool. The tool includes a substantially cylindrical body portion, a head portion, and a tip section, each integral to the tool. The body portion has a longitudinal axis about which it is rotable, a diameter, a sidewall substantially parallel to the longitudinal axis, a proximal end, and a distal end. The head portion is located at the distal end of the body portion. The head portion includes a multi-section face, having a first face section and a second face section, that converges to the tip section. The tool is retractable, reduces overheating, improves weld quality by reducing internal voids and lack of fusion, and facilitates variable penetration welds.
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