| 摘要 |
PROBLEM TO BE SOLVED: To provide a friction stir welding apparatus (10) to weld metal, metal alloy or other materials. SOLUTION: The friction stir welding apparatus (10) includes a pin tool holder (14), a shoulder (16) having a surface coupled to the pin tool holder (14), and a pin tool (12) coupled to the pin tool holder (14). The pin tool (12) is at least partially protruded from the surface of the shoulder (16), wherein the pin tool (12) is made of a consumable pin tool material. Optionally, the shoulder (16) rotates at a predetermined rotational speed and is retractable into/extendable from the pin tool holder (14) at a substantially constant rate. Optionally, the shoulder (16) is also made of a consumable shoulder material that is at least partially incorporated into the volume of a joint to be welded. The consumable shoulder material or the consumable pin tool material comprises a material that is the same as, similar to, or dissimilar from one or more materials comprising a workpiece to be friction stir welded. COPYRIGHT: (C)2005,JPO&NCIPI
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