Weco Discovery 172T, Инструкция по эксплуатации

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WELD THE WORLD
Cod. 006.0001.1960
03/05/2019 V.2.2 Discovery 172T
32
ENGLISH
Tab. 13 - Recommended DYNAMIC ARC parameters
ANY TYPE OF JOINT
Sheet thickness (mm) Current (A) DynArc Value (Amperes)
1,0 mm 35 A - 50 A 5 - 10
2,0 mm 50 A - 80 A 10 - 15
3.0 mm 80 A - 140 A 15 - 25
4.0 mm 140 A - 170 A 25 - 50
In order to have optimum control of the arc, it is advisable to ignite it at a distance of between 4-5 mm from the
initial point of the joint (point zero) .
- MULTI TACK
○ This consists of continual welding that allows optimum control of the thinnest layers and sheets/
bevels with irregular shapes.
- Benefits:
• Major reduction in oxidisation with the absence of deformations.
• This parameter allows thin gauge sheet to be welded without deformation.
- Consequences of a higher value:
• Welding of thinner gauge sheet without deformation.
• Less melting of material, slower welding process.
TIG DC WELDING CONTINUOUS TIG DC WELDING WITH MULTITACK
Continuous TIG welding provides continuous energy
which prevents the cooling of the piece and does not
cause overheating with excessive penetration and ex -
cessive distortion effects.
Using the pulsed TIG reduces the effect of overheating
but it does not solve it completely as the arc will remain
on and will still provide energy and heat.
The series of triggers repeated over time allow the piece
to disperse the beat between a trigger and another. By
adjusting the MultiTack frequency the weld penetration,
speed’ of execution and in particular the control of the
heat input can be optimised as well as any consequent
deformation of the piece.
When welding corner joints, the Multitack may be used with excellent results. The welding remains white and free of
any oxidation often avoiding the post welding cleanup treatment with acids.