OPERA
TING INSTR
UCTIONS
38
MIG 140 INVERTER WELDER 058-9305-6
Types of welding beads
Weld bead formation
The formation of weld bead depends on the welding speed and arc conditions.
Faster weld speed:
•
The bead will be thin and weak
(fig n).
•
The ridges in the weld are long and
triangular.
Slower weld speed:
•
The bead will be wide and tall
(fig o)
.
•
This results in the occurrence of cold
joints and slag inclusions.
Stringer bead
Weave bead
•
The stringer bead is formed by
travelling with the electrode in a straight
line while keeping it centered over the
weld joint
(fig l)
.
•
The weave bead is made by weaving from
side to side with the electrode. It can be
used when needed to weld the metal over
a wider space
(fig m)
.
fig l
MC-589305-41
fig m
MC-589305-42
MC-589305-43
fig n
MC-589305-44
fig o
