Tig-welding: application features

Argon Arc welding tig (TUngsten INert GAs), or welding with non-consumable electrode is illuminated when an arc between the electrode of tungsten and welded parts. Thus, the arc gap does not occur the transfer of the molten metal. It allows easier burning of the electric arc and greatly increase its stability. In addition, tig-welding allows to reduce losses to evaporation, eliminate possible spatter and limits the impact of gas from the arc column into the molten metal. As a result, the quality of the weld is raised to a new more perfect level.

Tig-welding is AC or DC, and, if the latter is used only straight polarity, that is, when the terminal “plus” connect welding details, and to terminal “minus” - non-consumable electrode. The need to connect this way is because if you change terminals in places, there is a possibility of overheating of the refractory metal tungsten and, therefore, significantly reduced his resistance. In addition, there may occur a chipping or melting of the electrode, which will lead to the inevitable defects of the weld.

Tig welding involves the following basic elements in the design of the installation: power supply AC or DC, arc stabilizer, an oscillator, a device for controlling the amount of current the generator current pulses, gas solenoid valve, and a device for suppressing current components.

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Tig-welding is the most versatile form of metal compounds, because it allows you to weld a variety of materials in any position in space.

High-Quality process of joining parts is achieved by the fact that it spent a little more time than on any other type of welding. In this regard, tig-welding is used only in the case when the qualitative characteristics of the resulting weld are essential.

A Distinctive feature of this type of welding is that pure argon is used for joining all materials, while for other types of welding is necessary to select a gas in accordance with the welded metals.

Tig-welding is a complicated and laborious process. Therefore, for it required a specially trained qualified welder. The technological process would require sufficient skill, because you need one hand to ensure sufficient and timely supply of filler material, while in the other hand will be the welding torch.

When choosing a welding machine of this kind should be guided by the following considerations:

1. You Need to determine the power supply capacity of the welding machine.

2. To Assess the complexity and volume of work.

3. Consider the kind of the input current: AC or DC.

You Should also know that some welders can use immediately and constant and alternating current. It is necessary to weld different materials such as aluminum and steel. Welders have a wide range of current values from 3 to 500 A.