AN IMPROVED SINGLE/TANDEM WIRE SUBMERGED ARC WELDING MACHINE FOR BUTT JOINT AND HARDFACING IN GROOVES WITH WIDTH OF DIFFERENT SIZES AND A HIGH DILLUTION PROCESS

摘要

The invention relates to an improved single/tandem wire submerged arc welding machine for butt joint/ hardfacing of similar/different combination of filler wires, the improvement is with two nozzles (4) is at least one additional two-wire feeder means (2) with two nozzles (4) is provided to a conventional submerged arc welding machine so as to achieve a synchronous operation of the existing and the additional wire feeder means (2) both being mounted on an integrated shaft (3); and the wire feeder means having a single control device drawing power from a single direct current constant voltage power source such that a single weld pool with new weld chemistry is obtained when dissimilar or similar wire combination is fed via the two wire feeder means.