Sweiss SKYARC ULTRA 3140, Руководство оператора

Страница: 21 / 31

OPERATION CONTROL AND CONNECTORS
16
drying
Under current or over speed in the welding
The arc is too long or lean burning, the
molten pool protection is not good
Over current, the coating of electrode falls
off and lose protection
Manipulation of electrode is not proper
Strictly to dry the electrode according to
manual
Correctly to choose parameters and to operate
Using the short arc operation
Welding operation in the field should have
anti-wind protection
Don’t use the invalid electrode
Inclusion &
slag
inclusion
The slag clears bad in the middle layer in the
welding process
Under current or over speed in the welding
Welding operation is not proper
The welding material can not match the
work piece
The groove design & processing are not
proper
Choosing the electrode of good slag
detachability
Strictly to clear the slag in the layers
Correctly to choose the welding parameters
Adjusting
the electrode angle and
manipulation way
Hot crack
In the process of solidification, the inter
crystal segregation is seriously caused. At the
same time, with the effect of welding stress,
the hot crack is formed. Strictly control the percentage of S and P in
welding material.
Adjust the structure of welding material.
Adopt the basic electrode.
Cold crack
Three reasons will cause cold crack:
The structure turned from the marten site
The residual stress caused by big restraint
intensity
The residual hydrogen in welding gap.
Adopt low hydrogen type basic electrode.
Bake under the instruction before use.
Remove the feculence before use, reduce the
percentage of hydrogen
Adopt appropriate parameters and heat input
After welding, do dehydrogenation at once.
§4.6 Operation Environment
●
Height above sea level is below 1000m.
●
Operation temperature range:-10
0
C
～
+40
0
C.
●
Relative humidity is below 90 %(+20 0 C).
●
Preferably site the machine some angles above the floor level, the maximum
angle does not exceed 15 0 .
●
Protect the machine against heavy rain or in hot circumstance against direct
sunshine.
●
The content of dust, acid, corrosive gas in the surrounding air or substance can
not exceed normal standard.
●
Take care that there is sufficient ventilation during welding. There is at least 30cm
free distance between the machine and wall.
§4.7 Operation Notices
●
Read §1 carefully before attempting to use this equipment.
●
Connect the ground wire with the machine directly
●
In case closing the power switch, no-load voltage may be exported. Do not touch