User manual

10
1. Electrode welding
Arc welding with coated electrodes is a fusion procedure that uses an electric arc as a source of heat. This is
formed between the extremities of a coated electrode and a base material.
The heat developed by the arc melts the base material, the rod and part of the coating. The remaining part of it
burns into smoke, creating an atmosphere that protects the welding bead from the oxidising action of the air.
The part of the coating that enters the weldong bath separates from the metal, moving to the surface where it forms
the slag which contributes in protecting against air.
The procedure can be done in all welding positions.
WELDING POSITIONS
There are four basic positions:
 Surface: the electrode is applied from above and the parts to weld are in a horizontal position.
 Frontal: the electrode is applied horizontally with the parts to weld in a vertical position.
 Vertical: the electrode acts vertically and the parts to weld are in the same position. They are
distinguished in two positions: Vertical ascending: the electrode moves upwards; Vertical descending:
the electrode moves downwards.
ASCENDING
DESCENDING