Operation control and connectors
Welding operation
4.5 Welding operation
4.5.1
Striking arc way
20
Ÿ
Knocking arc: take the electrode upright to touch the workpiece, after forming short circuit, quickly lift
up about 2~4 mm, and arc will be ignited. This method is difficult to master. But in the welding for the
brittle or hard steel, it is better to use knocking way.
electrode
workpiece
electrode
electrode
workpiece
workpiece
Take the electrode upright
The Electrode touch the workpiece
upright
up
touch
2
～
4mm
Lift up for about 2-4mm
Ÿ
Lifting arc: take the electrode to scrape the workpiece for striking arc. But it may cause the arc scratch,
so must to lift arc in the groove.
4.5.2
Manipulation of electrode
electrode
workpiece
weld
1
2
3
2
1-electrode moving; 2-the electrode swing right & left; 3-the electrode move along weld
Ÿ
In MMA welding, there are three motions to being
matched in the end of electrode: the electrode
moving to the molten pool along axes; the
electrode swing right and left; the electrode
moving along welding way.
Ÿ
The operator can choose the manipulation of
electrode based on welding joint sharp, welding
