B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
B23K 20/12 (2006.01) B23K 20/26 (2006.01) B29C 65/06 (2006.01) B29C 65/00 (2006.01)
Patent
CA 2204570
A method and apparatus for friction stir welding that produces a weld of significantly reduced surface roughness at significantly higher welding rates, in materials that are difficult to weld, such as non-extrudable aluminum alloys. The method includes cooling the stir welding tool during the welding process, thereby reducing the tendency of softened metal to adhere to the rotating pin and shoulder of the tool. The apparatus includes a tool with internal spaces or an external jacket, through which coolant can be pumped to remove heat and cool the tool during welding operations. In another embodiment, the apparatus includes a device for spraying a coolant onto exterior surfaces of the distal end of the welding tool to thereby remove heat from the tool, and the surrounding workpiece, during welding.
Bull Housser & Tupper Llp
The Boeing Company
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