Vertical Upward Welding in Which Wire Feed is Interrupted

A process for performing vertical upward welding so as to form a weld bead on a workpiece using welding apparatus which includes a welding gun and an electrode wire which is mechanically fed by the welding apparatus, the process comprising the steps of:

• a) providing preset parameters on the welding apparatus including (i) a voltage, and (ii) a wire feed speed;
• b) welding the workpiece in a vertically upward direction with the welding apparatus set at said voltage and with the electrode wire feeding from the welding gun at said feed speed for a first predetermined duration where an arc is formed between the welding gun and the workpiece;
• c) halting the feeding of the electrode wire as the welding gun is moved in said vertically upward direction, such that the arc is extinguished and so as to interrupt the step of welding in b) for a second predetermined duration;
• whereby a weld pulse having a finite length is formed on the workpiece;
• whereby the respective weld pulse is permitted to cool during step c);
• wherein movement of the welding gun during step c) locates the welding gun at a next position at the workpiece in preparation for forming another one of the weld pulses when step b) is repeated;
• wherein a plurality of the weld pulses form the weld bead.