OPERATION CONTROL AND CONNECTORS
14
4.3.2 Manipulation of electrode
In MMA welding, there are three motions
of electrode: the electrode moving to the
molten pool along axes; the electrode swing
right and left; the electrode moving along the
weld path in a forward’s direction.
The operator can choose the manipulation of electrode based on welding joint shape,
welding position, electrode spec, welding current and operation skill, etc.
The details please refer to
《
Welding Dictionary
》
P69, Volume 1 of Edition 2.
4.4 Welding parameters
4.4.1 Joint form in MMA
In MMA welding, the common basic joint form: butt joint, lap joint, corner joint & T
joint.
4.4.2 Electrode selection
The electrode diameter selection is based on the workpiece thickness, welding
position, joint form, welding layer, etc. Please refer to the following table.
The welding current reference for different electrode diameter
Electrode
diameter/mm
1.6
2.0
2.5
3.2
Welding current/A
25
～
40
40
～
60
50
～
80
100
～
130
The relation between the welding current(I)’ factor(K) & electrode diameter(d) (I
＝
K×d: Carbon electrode)
butt joint
lap joint
corner joint
T joint
electrode
workpiece
weld
1
2
3
2
1-electrode moving; 2-the electrode swing right & left; 3-the electrode move along weld
Summary of Contents for Arcostick MMA 160 Minespec
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