40
Operating manual
ARCPULL 350
Translation of the original
instructions
3.4. UPDATING THE MACHINE
The product has a USB port on the front panel, protected by a cap, for upda-
ting its software (adding new synergies and features). Contact your distributor
for further details.
4. PROCESS FOR DRAWN-ARC WELDING A CONSUMABLE
Drawn-arc welding is used to weld consumables (pulling rings, studs and nails, etc.) to a support part by bringing the
two parts together using an electric arc and bringing them both into contact with one another.
Reminder the drawn-arc welding process (for more details, please refer to ISO 14555):
There are four main stages: ignition, cleaning, drawn-arc welding and fusion
Phase
Ignition
Cleaning:
Maintaining
the Arc:
Attaching:
T (ms)
0 - 200 ms
10 - 800 ms
0 - 50 ms
I (A)
≈ 80 - 150 A
50 - 60 A
50 -
350
A
≈
80 - 150 A
Ignition:
the consumable (pulling ring or stud, etc.) is brought into contact with the support sheet. Pressing the trigger
will start the welding process: the power source sends an electric current into the chuck, the gun’s shaft rises slightly
and a low-intensity electric arc is created.
Cleaning:
This phase could also be called preheating. The power source regulates the current to ensure a low-inten-
sity electric arc, the heat generated by this arc allows:
- to burn off any impurities from the backing sheet (grease, oil or an electrolytic zinc coating)
- to pre-heat the two parts, and therefore limit the welding arc’s thermal shock, so as to improve the quality of the weld
During this phase, neither the consumable nor the support sheet is melted. Similarly, this phase does not allow the
galvanised sheet’s zinc layer to be removed.
Drawn-arc welding:
the power source significantly increases the current to create a high-energy arc that creates a
weld pool on the support sheet and melts the tip of the consumable.
Fusion:
The welding gun plunges the consumable into the weld pool.
5. STUD DESIGN AND WELD POOL PROTECTION
The types of consumable (shape, size and material) suitable for drawn-arc welding are listed in ISO 13918. In addition
to low-carbon steel, stainless steel and copper-plated steel consumables, the product can also weld certain aluminium
accessories.