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Просмотр инструкции сварочного оборудования Awelco BLUEMIG 170, страница 8
3.2. WIRE-FEEDER MOTOR
M ak e sur e th at t he s iz e of t he groov e i n th e feed r oll c orr es pon ds to t h e
welding wire size being used. The feed roll has the wire diameter
st amp ed on its s i de. Th e m ac hi n es ar e equ i pped w ith pr op er s h agren eed
rolls suitable for welding with flux cored wire without gas protection. To
weld w ith fu ll w ire wit h GAS pr otec tion you h ave to r eplac e t he rol l of t he
wir e feeder gr oup whic h has V f orm f or the s t eel wir e and U form for the
aluminium wire. If you intend to use the welder with gas protection you
hav e t o req uir e suc h r olls an d the pr ess ur e r educ er t o your r etai ler or t o
t he bui ld er s oci e t y .
3.3. FEEDING WIRE INTO THE WELDING TORCH
1. Releas e t he Spring Loaded Press ure Arm (1) r otat e the Idle Roll Arm
(2) away from the W ire Feed Drive Roll (3). Ensur e that the gr oove siz e
in th e feeding position on the drive r oll match es th e w ire size b eing used.
2. Carefully detach the end of the wire from the spool. To prevent the
spool f rom unwi ndin g, maintain tensi on on th e wire until after s tep 5.
3. Cut t he bent portion of wire off and st raighten the first 10 cm.
4. Thr ead t he wir e thr oug h t he ing oing gu ide t ub e (4), over t h e dri ve r ol l
(3), and into the outgoin g guid e tube ( 5).
5. C los e t he idle r oll ar m an d latc h the s pr ing l oad ed pr es sur e ar m (2) in
place. Rotate the spool counterclockwise if required to take up extra
slack in the wir e.
6. The idle roll pressure adjustment wing nut is normally set for mid-
pos ition on the pr ess ur e ar m thr eads . If f eedin g pr oblem s occ ur b ec aus e
the wire is flattened excessively, turn the pressure adjustment counter-
clockwise t o reduc e distortion of the wire. Slightly less press ure may be
required when using 0,6 mm wire. If th e dri ve roll slips whil e feeding wire,
th e pr essure sh oul d b e increas ed until the w ir e f eed s prop er ly.
7. Rem ov e g as n oz zl e and c ont act t i p f r om en d of g un.
8. Turn the machin e ON (“I”).
9. Straighten the g un cab le assem bly.
10. D epress the gun trigger switch and feed welding wire thr ough the gun
and c ab le. (P oint gun away f rom yours elf and ot hers wh ile f eedi ng wir e.)
Releas e gun trigger aft er wir e appears at end of gun.
11. Turn the mach ine OFF ( “O”).
12. R ep l ace c ont act tip and g as n oz zl e.
13. Cut the wire off 6 – 10 mm from the end of the tip. The machine is
now ready to weld.
3.4. TORCH CONNECTION
The t orch is c onnect ed directly t o the welding machine so it is r eady f or
use. A probable replacement of the torch must be done with care and if
possible by a technician. To replace contact tips, it is necessary to
unscr ew or to pull it. Replace tip, check that it corresponds with the wir e
size and replace the gas shroud. For good wire feeding during welding
operations, it is essential that the correct size parts are used for each
wire. Keep always cl ean the contact ti p.
4. WELDING MODE
4.1. CONTINUOUS WELDING
It is th e m od e in w h ich t h e w eld i ng m ac h in e is likely to be used t h e m ost .
In this mode, you have only to press the button of the torch and the
welding machine begins to work. To stop welding it is necessary
releas ing the torch button.
4.2. GAS PRESSURE
Gas pressure should normally be set to give a reading between 6 / 12
litres per minute on the flowmeter. Anyway, ever y operator will find what
suits him the most with his type of work and can make the necessary
adj us tm ent .
4.3. GAS – NO GAS WELDING MO DE
4.3.1. Ga s - Conn ect torch clamp to positive termin al “+” and earth clamp
to negative(-)
4.3. 2. N o ga s - ( only f or pr es et m od els) Connec t earth c lamp t o pos it iv e
terminal (+) and the t orch clamp to n egative (-).
4.4. MIG - MAG WELDING MODE
A ) MIG = Metal Inert Gas
B ) MAG = Metal Active Gas
Thes e two modes are perfect ly equival ent, the diff erenc e is given by th e
kin d of gas y ou us e. In c as e A th e gas emp loyed is ARG ON ( inert gas ).
In case B the gas employed is CO
2
( active gas). To weld alluminium
alloys you need use ARGON (100%), to weld steel it is enough a
compound of ARG ON 80% and CO
2
20%. You c an on ly use CO
2
in case
you w il l wel d iron.
5. WELDING GUIDE
5.1. GENERAL RULE
When welding on the lowest output settings, it is necessary to keep the
arc as short as possible. This should be achieved by holding welding
torch as close as possible and at an angle of approximately 60 degrees
to the workpiece. The arc lengt h can be increas ed when welding on the
highest settings, an arc length up to 20 mm can be enough w hen welding
on maximum settings.
5.2. GENERAL WELDING TI PS
From time to time, some faults may be observed in the weld owing to
external influences rather due to welding machine’s faults. Here are
some that you may come across :
· Porosity
Small holes in the weld, caused by break-down in gas coverage of the
weld or sometimes by foreign bodies inclusion. Remedy is, usually, to
grind out the weld. Remember, check before the gas flux (about 8
liters/minutes), clean well the working place and finally incline the torch
while weld in g.
· Spatter
Small balls of m olten metal which c ome out of the arc. A little quant ity is
unavoidable, but it should be kept down to a minimum by selecting
correct settin gs and having a cor rect gas flow and by keep ing the weld ing
torch c lean.
· Narrow heap welding
C an be caused by moving the torch too fast or by an incorrect ga s fl ow.
· Very thick or wide w elding
C an be caused by moving the torch too slowly.
· W ire b urns back
It can be caused by wire feed slipping, loose or damaged welding tip,
poor wire, n ozzl e held too clos e to work or voltage too high.
· Little penetration
It can be caused by moving torch too fast, too low voltage setting or
inc orr ec t feed s ett ing, r ever sed p olar ity, ins uffic ient blunt ing and d ist anc e
between strips. Take care of operational parameters adjustment and
improv e the prep arat i on of th e w orkp iec es.
· Workpiece’s piercing
It m ay be caused by m ov i ng t h e wel d ing tor c h t oo slow, t oo h igh w el di n g
pow er or by an inv al id w ir e feed in g.
· Heavy spatter and por osity
It c an be c aus ed by n ozz le to o f ar f rom work, d irt on w ork or b y low g as
flow. You have to the two parameters, remeber that gas has not to be
lower than 7-8 liters/ min. and that the curr ent of welding is appropr iat ed
to the wire you are using. It is advisable to have a pressure reducer of
input and out put. On the manom eter you can r ead t he range express ed
in lit er.
· Welding arc inst a b ility
It may be caused by an insufficient welding voltage, irregular wire feed,
insuf ficient protective welding gas.
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Юрий Васильевич Ишанькин
19 сентября 2018, Мурманск
Где скачать подробную электросхему аппарата BLUEMIG 170?
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