Welding system and method for use

The method of welding two objects together where the object to be welded has a first side and a second side, the first and second sides being opposite sides of the object be welded, where the system further comprising:

• a first wagon, in use suitable to be arranged on a first side of the object to be welded, where the wagon comprises one or more magnets for remaining on the surface of the object to be welded, and being able to travel on the surface of the object to be welded, where a welding device is arranged in connection to or on the wagon;
• a slave wagon, in use suitable to be arranged on a second side of the object to be welded, where the slave wagon comprises a tub, the tub having an upper rim configured to the contour of the object to be welded, and where further a gas inlet is provided such that a suitable gas may be introduced into the tub, and where the slave wagon comprises one or more magnets such that in use the rim of the tub on the slave wagon may remain proximate the second side of the object to be welded, and where means are provided for moving the slave wagon such that the tub is superposed the fusion zone on the object to be welded where
• two objects to be welded are arranged in the correct relative position to be welded defining a welding zone between the two objects;
• the first wagon is positioned on the first side of one object at a free edge of the object;
• the slave wagon is positioned on the second side of the object such that the one or more magnets provided on the first wagon and the slave wagon attracts each other, thereby positioning the welding device on the first wagon superposed the tub on the slave wagon;
• moving the first wagon and the slave wagon to the position to be welded;
• filling the tub with an inert gas,
• activating the welding device including providing an inert gas surrounding the fusion zone;
• and
• moving the first wagon and the slave wagon along the welding zone as the welding process progresses.