Arcoweld Arcostick MMA 160 Minespec, Руководство оператора

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OPERATION CONTROL AND CONNECTORS
16
Blowhole
There is some dust like oil, rust or water on the
work piece surface and groove
The coating of electrode is damped & is not
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 with the coating of electrode
falling off and losing protection
Manipulation of electrode is not correct.
Clear out the dust around groove for about 20
～
30mm
Strictly dry the electrode according to manual
Choose correct parameters and use short arc
operation
Welding operation in the field should have
anti-wind protection
Don’t use an invalid electrode
Inclusion &
slag inclusion
Slag removal is difficult.
Under current or over speed in the welding
Welding operation is not correct.
The welding material can not match the work
piece.
The groove design & processing are not
correct.
Choose an electrode with good slag
detachability
Clean slag from within each pass. Choose
correct welding parameters
Adjust the electrode angle and manipulation
Hot crack
In the process of solidification, inter crystal
segregation is 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 high restraint
intensity
The residual hydrogen in welding gap.
Adopt low hydrogen type basic electrode.
Bake under guidelines 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 Operational 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).
●
Machine should be situated level. Maximum angle does not exceed 15 0 .
●
Protect the machine against heavy rain or in hot circumstances against direct
sunshine.
●
The content of dust, acid, corrosive gas in the surrounding air or substance cannot
exceed normal standards.
●
Take care that there is enough ventilation during welding. There is at least 30cm free
distance between the machine and wall.
4.7 Operational Notices
●
Read 1 carefully before attempting to use this equipment.
●
Connect the ground wire to the machine directly