Thermal Arc PRO-WAVE 300 TSW, Руководство по обслуживанию

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PRO-WAVE 300TSW
6-4 August 10, 2005
Description Possible Cause Remedy
Welding arc can not
be established.
(cont) C. Gas flow incorrectly set,
cylinder empty or the torch
valve is off.
C. Select the right flow rate, change
cylinders or turn torch valve on.
12. Arc start is not
smooth.
A. Tungsten electrode is too
large for the welding current.
A. Select the right sized electrode.
Refer to the Basic TIG Welding
Guide.
B. The wrong electrode is
being used for the welding
job.
B. Select the right electrode type.
Refer to Basic TIG Welding
Guide.
C. Gas flow rate is too high. C. Select the correct rate for the
welding job. Refer to Basic TIG
Welding Guide.
D. Incorrect shielding gas is
being used.
D. Select the right shielding gas.
Refer to Basic TIG Welding
Guide.
E. Poor work camp connection
to work piece.
E. Improve connection to work
piece.
6.02 Stick Welding Problems
Description Possible Cause Remedy
1. A. Electrodes are damp. A. Dry electrodes before use.
B. Welding current is too high. B. Reduce welding current.
C. Surface impurities such as
oil, grease, paint, etc.
C. Clean joint before welding.
2 A. Rigidity of joint. A. Redesign to relieve weld joint of
severe stresses or use crack
resistance electrodes.
B. Insufficient throat thickness. B. Travel Slightly slower to allow
greater build up in throat.
C. Cooling rate is too high. C. Preheat plate and cool slowly.
3 A. Welding current is too high. A. Increase welding current
B. Electrode too large for joint. B. Use smaller diameter electrode.
C. Insufficient gap.
C. Allow wider gap.
D. Incorrect sequence. D. Use correct build-up sequence.
Crack occurring in
weld metal soon
after solidification
commences.
Gas pockets or
voids in weld metal
(Porosity).
A gap is left by
failure of the weld
metal to fill the root
of the weld.
Art # A-05567
Figure 6-1: Example of insufficient gap or incorrect sequence.