What is Tandem wire?
In the tandem MIG/MAG process (sometimes referred to as ‘twin-wire’ or double wire welding), two wires are continuously fed through a special welding torch and are consumed to form a single molten pool. In current systems, the wires are electrically isolated from each other within the contact tip.
What is the advantage of tandem welding?
The primary advantage of tandem welding is increased deposition, which translates to increased travel speeds.
What is tandem SAW welding?
The two-wire tandem submerged arc welding (SAW-T) process is a high-deposition welding process capable of improving the productivity while welding plates with medium to high thicknesses. The leading wire is generally connected to either DC or AC, and the trailing wire to AC.
What is main benefits of twin welding process *?
This results in a high degree of flexibility: the process is much more stable allowing very high welding speeds (2 m/min +) to be achieved on thin sheets. For thick sheets, the process boasts a high deposition rate (22 kg/h +), which allows a significantly higher weld seam volume to be achieved.
What is atig welding?
Activated TIG welding process known as A-TIG can be beneficial in this respect. A-TIG welding process involves a method of increasing the penetration capability of the arc in TIG welding. This is achieved through the application of a thin coating of activating flux material onto the work piece surface prior to welding.
What is narrow gap welding?
Narrow gap welding (also called narrow groove welding) was developed to weld thick sections more economically. This welding procedure uses joint preparations with small, included angles, typically in the range 2-20°, which require less weld metal and less welding time to fill.
What is hybrid welding process?
Hybrid techniques refer to processes in which laser welding is combined with other welding methods. Compatible processes are MIG (metal inert gas) or MAG (metal active gas) welding as well as TIG (tungsten inert gas) or plasma welding.
Which polarity is used in SAW?
Like other wire-fed processes, DCEP polarity during the SAW process provides optimal penetration, while direct current electrode negative (DCEN) increases deposition rates at the expense of penetration.
What is multiprocess welder?
A multi-process welding machine (also known as a combo welder or an MP welder) is a single piece of welding equipment that is capable of performing two or more welding processes.
What is dual process welding?
Flux cored arc welding (FCAW), also know as dual shield welding, is a semi-automatic arc welding process that is similar to metal active gas (MAG) welding. FCAW uses a continuous wire fed electrode, a constant-voltage welding power supply, and similar equipment to MAG welding.
Which is better TIG or arc welding?
TIG welding produces cleaner and more precise welds than MIG welding or other Arc welding methods, making it the strongest. That said, different welding jobs may require different methods, while TIG is generally stronger and higher in quality, you should use MIG or another method if the job calls for it.