Welding torch system for use in welding or cutting operations, welding torch for use in such a welding torch system and method for welding using such a welding torch system or such a welding torch

Welding torch system for use in welding or cutting operations during which fume is created, said welding torch system including a welding torch comprising:

• a contact tip holder having formed therein a longitudinal passageway with a head end through which can be supplied welding wire having a free end forming a contact tip;
• a coaxial nozzle comprising an inner shield gas conduit having a shield gas outlet for supplying a shield gas, said inner shield gas conduit surrounding said contact tip holder, an outer shell at least partly surrounding said inner shield gas conduit, said outer shell having a head end, wherein between an inner surface of said outer shell and an outer surface of said inner shield gas conduit a fume extracting passageway is formed and wherein a plurality of openings is provided in a distal end of the outer shell for extracting ambient air and fume into the coaxial nozzle;
• said welding torch system further comprising:
• a shield gas generator and supply unit operatively connectable to the inner shield gas conduit for—during operation—supplying shield gas through the shield gas outlet;
• and
• a fume extracting assembly operatively connectable to the fume extracting passageway for—during operation—extracting fume and ambient air;
• wherein the welding torch system is arranged for—during operation—supplying shield gas through the shield gas outlet at a velocity between about 1.5 m/s and 10 m/s;
• and wherein the outer shell is provided with a number of longitudinally extending slots, each slot communicating with the fume extracting passageway, which slots are distributed evenly in circumferential direction of the outer shell.