Sweiss SKYMAX 2040 Nx Manual De Usuario página 80

14. COMMON WELDING ARC PROBLEMS/SOLUTIONS
Defect name
Welding seam doesn't
meet the requirement
Undercut
Incomplete
penetration
Incomplete
fusion
Caused reasons
The groove angle is not proper
The root face and assembly gap
is not equal.
Welding technics parameters are
unreasonable The welder's
operation skill is lower.
Over current.
Arc length is too long.
The electrode angle is wrong.
Manipulation of electrode is not
proper.
The groove angle or gap is too
small, the root face is too big.
Welding parameters are not su
itable, or the assembly is not
good.
The welder's operation skill is
lower.
The welding thermal input is too
low.
The arc direction is lean
There are rust & dust on the side
of groove.
The slag between the layers is
not cleared well.
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Prevent methods
Choosing the proper groove
angle & assembly gap, improve
the assembly quality.
Choosing the proper welding
parameters.
Improve the operation skill of
welders.
Choosing the proper welding
current & speed.
The arc can't be drawn too long
The electrode angle should be
proper.
Manipulation of electrode should
be correct.
Correctly to choose and process the
groove size.
Correctly to assemble and ensure
clearance.
Choosing the suitable welding current
& speed.
Improve the operation skill of welders.
Correctly to choose the welding
parameters.
Operation seriously.
Enhance the clearness of layers.