MECHANICAL SYSTEM FOR AUTOMATIC GUIDING OF ONE OR MORE TORCHES OF A WELDING UNIT WITH THREE PIVOTING AXES FOR THE TORCH OR TORCHES

摘要

The invention relates to a mechanical system for automatic guiding of one or more torches of a welding unit in a groove delimited by the chamfered end surfaces of two metal parts to be welded together, of the type including a main carriage (1) moving along a stationary guide (2) relatively parallel to the groove (3), a secondary carriage (7) which is connected to the main carriage (1) by a hinged linking assembly (12) and which is provided with a torch supporting unit and a guiding device including bearing members in contact with the surfaces of the metal parts bordering said groove (3) and sensing members that enter the groove. The invention relates to the fact that the hinged linking assembly (12) includes three pivoting axes.