Westken
information manuals and technical assistance
General Manual for UN35 Butt Welder
Westken,
190 van Eden crescent, Rosslyn, Pretoria, South Africa.
www.westken.co.za (Tel; 0027 12 541 6064/6065 fax; 0027 12 541 8086)
7
Chapter three
Operational system of a
“UN35
” air operated Butt welding machine.
(UN35).
Please read this in conjunction with section on “spotwelding” on our website.
1)
The operator locates the material to be welded within the correct size “V” grooves
in the lower electrodes and brings the two faces of the part to be welded together..
Once located in position the operator presses down on the foot switch.
Keep
fingers out of the electrodes clamp area.
2)
The downward movement of the foot switch triggers the
electric micro switch
in
the
footswitch
and initiates the welding controller.
3)
The two electrodes clamp simultaneously onto the parts. The upset cylinder
applies pressure and initiates the welding timer
4)
The timer then switches the
thyristor (semipak)
to allow electrical supply into the
welding transformer
for a specified time.
5)
When electricity is fed into the
welding transformer
it is converted (transformed)
from high voltage/low amperage (380v/60amps) into low voltage/high amperage
(10volts/10000amps). This
transformed electrical supply
is directed from the
transformer, through the machine electrodes butt welding area.
6)
Due to a higher
resistance
to electricity in the steel parts to be welded than in the
copper electrodes heat is formed in the weld area causing the metal to melt, the
molten or
wet metal
is held together by the electrode clamps and the
follow-up
pressure
from the upset air cylinder applies additional pressure on the weld.
7)
Once the hot red color in the weld area disappears from between the welding tips
the
timer
will then allow the welding tips/electrodes to open and the completed
welded part can be removed.
Basic startup setting of a UN35 timer system on an air spot welder.
Please read the following on our website.
Westken
information manuals and technical assistance
Introduction to setting of Westken timer systems
Welding timers & water cooled Thyristors standard on air operated spot welders are;
1)
UN35
7 program vertical
160amp Semipack thyristor
The suggested setup of the UN35 timer controller system
1) Press green run/set button. Then one of the windows will start to flash.
