PROCRAFT 511307 - Page 17

Page 17
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Excess or
Burn-through
Weld droops on top
and underneath, or falls
through entirely,
making a hole
Proper
Weld is visible underneath and
bulges slightly on top.
Inadequate
Weld does not contact the
joint fully, just on the
surface.
Possible
causes
and Solutions
1. Excessive material at weld:
Reduce wire feed speed
2. Overheating:
Increase welding speed and
ensure that welding speed is kept
steady.
Welding not adhering properly
Gaps present between weld and previous
bead or between weld and work piece.
Possible
causes
and Solutions
1. Dirty work piece:
Make certain that work piece is clean
and free from oil, coatings, and other
residues.
2. Insufficient weld material:
Increase wire feed speed.
3. Incorrect welding technique:
Place stringer bead at correct place in
joint. Adjust work piece position or weld
angle to permit proper welding at
bottom of work- piece.
Pause briefly at sides when using a
weave bead. Keep arc on leading edge
of weld puddle. Hold gun at proper
angles and make tack welds to help
hold pieces.
Possible
causes
and Solutions
1. Work pieces too thick/close:
Joint design must allow weld to
reach bottom of groove and allow
proper welding procedures.
2. Incorrect welding technique:
Maintain
1
/
2
”or less stick out. Keep
arc on leading edge of weld puddle.
Hold gun at proper angles.
3. Insufficient weld material:
Increase wire feed speed.
4. Insufficient weld heat:
Reduce Welding Speed.
Bent at joint
Possible
causes
and Solutions
1. Improper clamping:
Make sure that pieces are clamped
securely in place.
2. Excessive heat:
Weld a small portion and allow
cooling before proceeding.
Reduce wire feed speed.