| 摘要 |
<p>Backing arrangement (2) for supporting a welded seam extending on a curved path which is formed between two curved work pieces by friction stir welding with a welding tool separate from the backing arrangement, which backing arrangement comprises a backing body (20) which is intended to bear upon the work pieces opposite said welding tool to assume at least a part of the compression force that is exerted by the welding tool against the work pieces to keep the material plasticized during the welding operation in the area of the welded seam. The backing body is equipped with a shoulder (21) which exhibits a bottom surface (22) turned outward, via which the backing body is equipped to bear on the work pieces. A driving mechanism (50) is situated to rotate and/or oscillate the shoulder so that the bottom surface of the shoulder can thereby be made to carry out a rotating and/or oscillating motion against the work pieces for creating fictional heat in them.</p> |
