| 摘要 |
Shown and described is an apparatus (1) for friction stir welding with a pin (3) which can be driven in a rotating manner and has a drive end (11) and a free end (13), wherein between the drive end (11) and the free end (13) there is provided a cylindrical engaging portion (15), with a first shoulder element (5), which is arranged on the side of the engaging portion (15) that is facing the drive end (11) concentrically around the pin (3) with respect to the axis of rotation (9) and which has a first bearing surface (19), facing the engaging portion (15) and extending perpendicularly to the axis of rotation (9), and with a second shoulder element (7), which is arranged on the side of the engaging portion (15) that is facing the free end (13) concentrically around the pin (3) with respect to the axis of rotation (9) and which has a second bearing surface (29), facing the engaging portion (15) and extending perpendicularly to the axis of rotation (9). The object of providing an apparatus (1) for friction stir welding with which the mechanical and thermal loading of the pin (3) and the thermal loading of the workpieces are reduced is achieved by the second shoulder element (7) being connected to the pin (3) freely rotatably about the axis of rotation (9). |
