ESAB ET 220i AC/DC, Руководство по эксплуатации

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ET 220I AC/DC
Manual 0-5346 BASIC WELDING GUIDE
4-9
Art: A-04971
Figure 1: Example of insufficient gap or incorrect sequence
4 A groove has been formed
in the base metal adjacent
to the toe of a weld and has
not been filled by the weld
metal (undercut).
A Welding current is too
high.
A Reduce welding current.
B Welding arc is too long. B Reduce the length of the welding arc.
C Angle of the electrode is
incorrect.
C Electrode should not be inclined less than 45° to
the vertical face.
D Joint preparation does not
allow correct electrode
angle.
D Allow more room in joint for manipulation of the
electrode.
E Electrode too large for
joint.
E Use smaller gauge electrode.
F Insufficient deposit time at
edge of weave.
F Pause for a moment at edge of weave to allow
weld metal buildup.
5 Portions of the weld run
do not fuse to the surface
of the metal or edge of the
joint.
A Small electrodes used on
heavy cold plate.
A Use larger electrodes and preheat the plate.
B Welding current is too low. B Increase welding current.
C Wrong electrode angle. C Adjust angle so the welding arc is directed more
into the base metal.
D Travel speed of electrode
is too high.
D Reduce travel speed of electrode.
E Scale or dirt on joint
surface.
E Clean surface before welding.
Art: A-04972
Figure 2: Example of Lack of Fusion