Autowel DRAGON-350A, Руководство пользователя

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8- 4. Reasons and remedy for defects of CO
8- 4. Reasons and remedy for defects of CO 8- 4. Reasons and remedy for defects of CO
8- 4. Reasons and remedy for defects of CO
2 2 2 2
welding
welding welding
welding
Type Type Type Type Main reason Main reason Main reason Main reason Remedy Remedy Remedy Remedy
1. Blow holes 1. Blow holes 1. Blow holes 1. Blow holes
1) No feed gas comes out
2) Air mixed in feed gas
3) Insufficient coating effect due
to strong wind
4) Carbon dioxide soaked in
5) Foreign material in welding part
6) Nozzle diameter is too small
7) Arc is too long
1) Check the gas cylinder, valve and pressure
regulator
2) Check the connection part of gas tube
3) Make measure for wind in wind speed
2m/ sor more
Remove spatter from the nozzle
4) Use gas of welding purpose
5) Clean the welding area
Remove feed oil from roller and wire
6) Select proper nozzle diameter
7) Lower voltage
2. Under cut 2. Under cut 2. Under cut 2. Under cut
1) Wrong grounding location
2) Welding speed is too fast
3) Arc length is long
4) Welding current is too much
1) Ground onto the first location
2) Slower the welding speed
3) Keep arc length short
4) Select proper welding current
3. Overlap
3. Overlap 3. Overlap
3. Overlap
1) Too low arc voltage comparing
to welding current
2) Welding speed is low
1) Raise arc voltage
2) Speed up the welding speed
4. Curve bead
4. Curve bead 4. Curve bead
4. Curve bead
1) Wire pressurizing lever does not
work
2) Distance between tip and the
base metal is too far.
3) Tip mounting is not proper
4) Wire bent
5) Tip is worn out
1) Adjust control screw of pressurizing lever
2) More than 10~ 15 times of wire diameter
3) Adjust mounting angle in order to go into
the wire guide directly
4) Straighten wire
5) Replace contact tip
5. Crack 5. Crack 5. Crack 5. Crack
1) Improper welding conditions
(high current, high speed)
2) Wire approaching angle is too
small
3) Too much containing of carbon
and other metals in the base
metal
4) Too much moisture in gas
5) Quick electrical break of arc in
crater
1) Set proper condition
(Raise voltage, slow speed)
2) Increase wire approaching angle
3) Preheating and after- heating treatment
4) Use gas of welding purpose
5) Treat with crater
(add up enough deposition metal)
Blow holes
Blow holes Blow holes
Blow holes
Overlap Overlap Overlap Overlap
Crack Crack Crack Crack
Under cut Under cut Under cut Under cut