Setting-Values For Seam-Type, Welding Position And Seam Thickness; Tig Welding; Variant I - Fronius T.I.M.E. SYNERGIC Bedienungsanleitung

Calculating the welding speed
This formula only holds good for a wire diameter of 1.2 mm and for
unalloyed and low-alloy steel wires. It takes no account of spattering
losses (typically 1 - 2 %) or of geometrical deviations such as root gaps
and weld overfill (typically 10 - 20 % lower speed).
Welding speed [cm/min] =
e.g. 'a 6' fillet weld ('a 6' fillet weld has a weld sectional area of 36 mm
and a wirefeed speed of 20m/min
Welding speed [cm/min] =
As the bead cross-sections in multi-pass welding are difficult to determine,
this makes the computation of the welding speed a rather complicated
affair. A planimeter or squared graph paper will be found very helpful
here. See below for setting-values for different types of seam, welding
positions and seam thicknesses.
SETTING-VALUES FOR SEAM-TYPE, WELDING
POSITION AND SEAM THICKNESS
Butt welds
Gravity position
- Root welding,
irregular gaps and root
widths of over 2mm:
2.5 - 4.5m/min
Regular 2mm gaps: 9m/min
- Filler passes
lower region: 12-15m/min
upper region: 15-23m/min
- Top passes: 15-18m/min
Horizontal-vertical position
- Root welding,
irregular gaps and root
widths of over 2mm:
2.5 - 4.5m/min
Regular 2mm gaps: 9m/min
- Filler passes: 12 - 18m/min
- Top passes: 9 - 12m/min
Overhead weld
- Root welding: 3 - 4m/min
- Filler passes: 9 - 11m/min
- Top passes: 9 - 11m/min
Vertical-up welds: 3 - 6m/min
Vertical-down welds: 9 - 11m/min
Wirefeed speed [m/min] x 1.13 x 100
Weld sectional area [mm ]
2
20 m/min x 1.13 x 100
= 62.8 cm/min
36 mm
2
Fillet welds
Horizontal position
- a3: 12 - 14m/min
- a4: 12 - 16m/min
- a5: 15 - 18m/min
- a6: 18 - 23m/min
- a7: 20 - 23m/min
- >a8 only multi-pass 20 - 23m/min
- Notch beads at 10 - 12m/min
Overhead position
- 9 - 11m/min for all seam
thicknesses and single or multi-
pass weld seams
Vertical-down welds
- 9 - 11m/min; max. a3.5: weldable
in one pass,
- thicker seams: multi-pass
Vertical-up welds
- 4 - 6m/min; min. seam
thickness a6
Gravity position
- a3: 12 - 14m/min.
- a4: 12 - 14m/min.
- a5: 17 - 23m/min.
- a6: 17 - 23m/min.
- ab a7: 22 - 30m/min.

TIG WELDING

VARIANT I

Variant I requires the TP 4-SP remote-control unit and the TIG Set
(consisting of AL 22-S / AL 16-S hand-held welding torch with gas hose,
gas pressure regulator and spare-parts box).
N.B.! In this variant of TIG welding, the electrode touch-down on the
workpiece causes a short-circuit current of the same size as the pre-set
welding current. Ignition cycles from 10 A upwards invariably result in
damage to the surface of the workpiece and the tip of the tungsten
)
2 electrode, and impair the weld-seam quality by leaving tungsten inclus-
ions.
- Ignition of the welding arc is effected by touching down the tungsten
electrode onto the workpiece.
- To interrupt the welding operation, simply lift the torch away from the
workpiece until the arc goes out. In this case, there will be no filling
of the end-crater at reduced current, and thus no gas-shielding of the
end-crater.
Fig.17 TIG Set
VARIANT II
Variant II requires the TP 4-SP remote-control unit, the TR 52-1 pedal
remote-control unit, a signal distributor and the TIG Set (AL 22-S / AL 16-
S hand-held welding torch with gas hose, gas pressure regulator and
spare-parts box).
Using this combination offers the following advantages:
- Reduction of the welding current at the instant of electrode touch-
down, using the pedal-operated remote-control unit
- Crater-filling is possible, by lowering the current using the pedal
remote-control unit (gradually taking the pressure off the pedal
causes the welding current to drop to approx. 10 A) - optimum gas
shielding is assured
- Welding-current limitation by means of welding -current regulator on
the TP 4-SP remote-control unit: On the one hand, the entire pedal
travel is always available for the selected range, yet on the other hand
it is not possible for e.g. a thin tungsten electrode to be overloaded
and/or to melt if the pedal is pushed all the way down to the floor.
Fig.18 Signal distributor
15