Accessories And Accessory Maintenance - Elektra Beckum Welding Transformers and Rectifiers SB 160 C Operating Instructions Manual

4.2 Weld Flaws and possible Causes -
5

Accessories and Accessory Maintenance

Connecting Welding Cables to the Welding
Power Source
Ring tongue terminal soldered, crimped, clamped
Fully Insulated Electrode Holder
spring
hand lever
handle
Replace broken insulating parts at once!
Attach earth clamp as close as possible to the weld. Structural components, beams, pipes or rails should not be used
for earth conducting if they are not the actual work piece.
Weld Undercut
Welding current to high
Electrode work angle too steep
Arc too long
Slag Inclusion
Welding current too low
Welding speed to high
Welding over slag on multi-
layer welds
Gas Inclusion
Work surface not clean
(rust, grease, paint)
Arc to long
Basic coated electrodes not
sufficiently dried
insulated jaws
Shown on Fillet Welds
Connecting (Extending) Welding Cables
Insulate screw joint terminal with rubber bush or heat-
shrinkable sleeve
Connection of Welding Cables to the Work Piece
Clean work piece surface for good conduction
21
End Crater
Electrode removed too quickly
from the weld pool, particularly
with high welding currents risk
of shrinkage cracking
Weld Toe Cracks
Material sensitive to welding
conditions
Weld cooled down too fast after
welding
Root Flaw
Slag entering root area
because distance too great