machine laminating machine of seam of a welded tube continuously, comprising a spindle controlled by electromagnetic means

摘要

Machine (1) for the laminating weld bead of a continuously welded pipe (2), in which the mandrel (4), positioned inside the welded pipe (2) is controlled by electromagnetic means comprising at least one ferromagnetic core (5) positioned inside the welded pipe (2), connected to one end of the mandrel (4) by non-magnetic connecting means (6) and subject to the magnetic field generated by a fixed electromagnetic coil (7) positioned "upstream" of the laminating machine (1). The other end of the mandrel (4) is advantageously connected, by means of further non-magnetic connecting means (9), to a further ferromagnetic core (8), positioned inside the welded pipe (2) and subject to the magnetic field generated by a further fixed electromagnetic coil (10) positioned "downstream" of the laminating machine (1). The electromagnetic coils (7,10) preferably surround the portions of the welded pipe (2) containing the cores of ferromagnetic material (5,8).