| 摘要 |
The invention concerns a device for welding tubes comprising a field winding (12) and a welding rod, characterized in that at least the portion (9) of the outer part of the welding rod located beneath the field coil (12) is made of a material which blocks the magnetic field, said portion (9) comprising a longitudinal slot (3) for channelling the magnetic field lines generated by the field winding (12). |
