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Parameters of piping back sealing welding for mild steel(DCEP)
Tungsten
Piping
diameter
electrode
diameter
2.0 mm
38 mm
42 mm
2.0 mm
60 mm
2.0 mm
2.5 mm
76 mm
2.5 mm
108 mm
2.5 mm
133 mm
2.5 mm
159 mm
2.5 mm
219 mm
2.5 mm
273 mm
2.5 mm
325 mm
5. MAINTENANCE & TROUBLESHOOTING
5.1. Maintenance
In order to guarantee safe and proper operation of welding machines, they must be maintained
regularly. Let customers understand the maintenance procedure of welding machines. Enable
customers to carry on simple examination and inspections. Do your best to reduce the fault rate and
repair times of welding machines to lengthen service life of arc welding machine. Maintenance items
in detail are in the following table.
Warning: For safety while maintaining the machine, please shut o the main input power and wait for
5 minutes, until capacitors voltage already drop to safe voltage 36V!
Date
Daily
examination
Gas
Welding
nozzle
wire
diameter
diameter
8.0 mm
2 mm
8.0 mm
2 mm
8.0 mm
2 mm
8〜10 mm
2.5 mm
8〜10 mm
2.5 mm
8〜10 mm
2.5 mm
8〜10 mm
2.5 mm
8〜10 mm
2.5 mm
8〜10 mm
2.5 mm
8〜10 mm
2.5 mm
- Observe that the knobs and switches in the front and at the back of arc
welding machine are exible and put correctly in place. If any knob has
not been put correctly in place, please correct. If you can't correct or x
the knob, please replace immediately.
- If any switch is not exible or it can't be put correctly in place, please
replace immediately! Please get in touch with maintenance service
department if there are no accessories.
- After turn-on power, watch/listen if the arc-welding machine has
shaking, whistle calling or peculiar smell. If there is one of the above
problems, nd out the reason and clear it. If you can't nd out the reason,
please contact your local service repair station or distributor/Agent.
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Welding
Arc
current (A)
voltage (V)
75〜90
11〜13
75〜90
11〜13
75〜100
11〜13
80〜105
14〜16
90〜110
14〜16
90〜115
14〜16
95〜120
14〜16
100〜120
14〜16
110〜125
14〜16
120〜140
14〜16
Maintenance items
Argon
Welding
ow rate
rate
L·min
cm·min
-1
-1
6〜8
4〜5
6〜8
4〜5
7〜9
4〜5
8〜10
4〜5
9〜11
5〜6
10〜12
5〜6
11〜13
5〜6
12〜14
5〜6
12〜14
5〜6
12〜14
5〜6
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