EQUIPEMENT
 Use of Gas Lens
GAS FLOW
 Optimized
 
SHEILD
 Use of a Special Jig
CURRENT
 Optimized
WELDING EQUIPEMENT
Using the gas lens optimizes shielding gas coverage which will ensure consistent, quality TIG welds.
 
 
THE STANDARD TYPE
Gases are discharged in a straight line. This method has a lower shielding effect.
GAS LENS
This method discharges the gas over a wider area. The sealed effect is much higher this way.
 
WELDING JIG
Optimized back sealed jigs aids with quality design production. Strength is maintained even from the inside of the pipe.
 
WHY THE BACK SHEILDING IS NEEDED WITH THE AFTER SEAL
Titanium material is not easy to weld. So when the the weld reacts with the oxygen & nitrogen & hydrogen in the atmosphere at low temperatures, the weld will become brittle. Therefore it is vital to seal the gas off from the irregular atmospheric conditions. Welding will not work if the temperature behind the weld drops from 200 degrees celcius or less.
 
 
 
WELDING CONDITIONS
The welding procedure is performed with the best temperature controlled conditions. This helps secure the added strength and clean consistency in the quality of the welds. This prevents any defects that would have been caused by dust, wind and humidity.
 
 
PROCESS
Oil content, Cutting thorough the powder and the like removal of fat,
You wash, prevent weld defect.
 
VARIOUS WELD CONDITIONS
 
 SURFACE
 EXTERIOR
 Gas Lens
@Not- used
Used
Used
Used
Used
Used
Used
 Back Sheild
With
With
With
CWithout
With
With
With
 Gas Flow Rate
15ml/min
15ml/min
B5ml/min
15ml/min
15ml/min
15ml/min
15ml/min
 Electric current
Basic Condition
AExcessive
Basic Condition
Basic Condition
Basic Condition
Basic Condition
Basic Condition
 SURFACE
 INTERIOR
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(@Lens not used) The blue-gray is the color of the weld which shows that the weld has a problem.
(AExcessive Welding Current) The thin weld color is close to blue gray, this shows problems in the weld.
(BExcessive Welding Current) This will produce undesirable look.
(C Without a back sheild) The white shows the oxidation, which means that the weld strength has decreased considerably.
 
Silver
This is the sign of a perfect weld,
free from any weld defects.
GoldEBlue Colour
A near perfect weld without any weld defects.
PurpleEBlue Colour
Some signs of ductility on the weld
surface. But, almost no influence
in the metals quality characteristics.
Blue ColourEGray
A considerable weld defect. The sheet welds
ductility has considerably decrease.
WhiteEAsh Yellow
Bad condition, the weld is fragile.
Above Note: The purplish blue colour is the sign that the weld is perfect.
 
With the above-mentioned result, "CWithout back shield",
the weld actually looks fine. But only when you bend it is when you can see how weak it actually is.
 
When the surface conditions conditions are controlled well, the weld state will yield the best results (the presence of the back shield conditions differs) as shown in the photo, the weld still retains strength even after bending it to a full 180 degrees.
From the following points, @ appearance due to the colour of the welds, A both are important, since it shows if the back has oxidized or not.
We pay extra attention to every details during the production process for our TOMEI products, when we use our jigs.
 
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