Patent ID: 8413875
Filing Date: 2013-04-09
Classification: B23K

Abstract:
1. A multi-shouldered friction stir welding tool comprising: an exterior threaded solid pin having a diameter and a length; a shoulder having a threadless inner diameter slightly larger than the diameter of the exterior threaded solid pin and at least one substantially radial threaded set screw hole; a monolithic shoulder-shank having a threadless inner diameter slightly larger than the diameter of the exterior threaded solid pin and at least one substantially radial threaded set screw hole; a pair of locking nuts having a threadless outer diameter and a threaded inner diameter operably compatible with the exterior threaded solid pin, wherein the shoulder and the monolithic shoulder-shank are capable of slidable engagement with the exterior threaded solid pin along the length of the exterior threaded solid pin to set a space slightly larger than a thickness of a work piece to be welded.