| 摘要 |
The method for repairing a closure fault in a metal tube containing at least one optical transmission fibre involves bending and tensioning the part of the tube with the fault, thus rendering convex the closure generatrix and forcing each fibre in this section against the tube wall opposite to the fault. Laser beam welding is then carried out spot-by-spot, with the thermal energy supply adjusted at each spot to a value required for welding. The line includes positions (1,2) with spools (3,4) for supply and reception of the tube (5), a device (7) coupled to a control unit (8) for moving the tube along a trajectory (6) between these spools, and a repair station (10) which is offset from the trajectory (6). The repair statin includes a laser spot-welding unit (11), and a mechanism (12) for bending and tensioning the tube. <IMAGE> |
