Self-adaptive MAG welding can move into the industrial phase -- the first industrial application of MAG STT welding with laser monitoring of the joint

摘要

The Institute of Welding (IS) has taken part in an extraordinary project: The construction of the new particle accelerator LHC (Large Hadron Collider) in a circular tunnel with a 27 km circumference, in the European laboratory for particle physics (CERN), which is located on the Franco-Swiss border. The dipolar LHC magnetised binding bands that make up a 15m long semi-cylinder structure in 10 mm thick 316LN are assembled into a cornice position. The IS developed computer software enabling them to use self-adaptive welding with laser monitoring of the joint, using the MAG STT (Surface Tension Transfer) device. The modelling of welding laws associated with the strategy of filling multipass joints, encompass the physical tolerances found in the preparation stage (setting, difference in level, root face...) under dynamic welding conditions. This is a world first for the automatic application of this MAG short-circuit technology controlled by self-adaptive monitoring of the joint.