Abstract: A welding machine, preferably of the flash butt welding type, designed to facilitate maintenance of the clamping means, e.g. clamps, of the two longitudinal metal products to be welded. Advantageously, a first structure, provided with first clamping means, and a second structure, provided with second clamping means, are supported in a first part of the carriage delimited by a first beam and a second beam of the carriage parallel to the feeding direction, while at least one transformer is fixed to the carriage and supported in a second part of the carriage, arranged laterally outside the first part.

Abstract: A welding machine for welding together the tail of a billet to the head of a second billet along a feeding direction, the machine comprising a carriage adapted to slide along the feeding direction, said carriage supporting a first structure integrally fixed to said carriage; first clamping means, provided on said first structure, for clamping the head of the second billet; a second structure connected to the first structure and sliding, parallel to the feeding direction, with respect to both the first structure and the carriage; second clamping means, provided on said second structure, for clamping the tail of the first billet; wherein first adjustment means are provided for adjusting the position of the second structure with respect to the first structure along said feeding direction; and second adjustment means are provided for adjusting the position of the second structure with respect to the first structure on a plane transversal to the feeding direction, so as to align the second clamping means with the