Correct maintenance of MIG/MAG welding torches

Jun. 24, 2024

Correct maintenance of MIG/MAG welding torches

A worn contact tip shows different characteristics: changes in colour or shape due to excessive deposits of weld spatters, ovate or oval hole openings due to abrasion of the material by the wire, unevenness at the bore opening through to clogged holes.

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Wire sticking

Contact problems often occur in the contact tip when straight torch necks are used, as is often the case in machine torches or robot torches. When wire drums are used, the problem is increased by the lower swirl of the wire. Because the contact surface and the contact time are too small, so-called micro-arcs are created within the contact tip. These cause faster wear of the contact tip. This can lead to the process becoming unstable. In such a case, a so-called burn back of the wire to the contact tip can easily occur. The wire ignites an arc in the contact tip instead of on the workpiece and merges with the inside of the contact tip. As a result, sticking occurs and the contact tip can no longer fulfil its task. If there is a conductive connection between the wire and the material to be welded, this can even lead to a short circuit and the complete welding torch can be destroyed. With the newer generation of power sources, however, there is no longer a risk of short circuit caused by welding spatter.

Bended torch necks help to minimise or completely avoid the above mentioned problems.

If wire sticking occurs more frequently, it may be that the contact tip is not suitable for the wire diameter. Some companies use contact tips that are too large for some welding applications. They want to reduce warehousing costs or keep them manageable and provide larger contact tips for some applications. It is not uncommon for two different wire diameters to be used at a welding workstation to weld a workpiece &#; but only one contact tip size is used. However, a practice like this does more harm than good, because more frequent changes of the prematurely worn out contact tips shorten the service life. The times for the removal of possible burnt-in wire and the shortened service life increase the costs.

A high-quality contact tip &#; whether made of copper or a copper alloy &#; should be able to weld several kilograms or several rolls of wire. If this result is not achieved, it is recommended to check the application.

New Welding Torches From Translas Shine In Regard To ...

Nieuwegein, Netherlands, October &#; During the German welding and cutting trade show &#;Schweißen & Schneiden &#;, Translas, a manufacturer of welding torches, introduced a new generation of MIG & TIG welding torches. The new line of torches 8XM and 8XT, which by now represent the 8th generation, shine in regard to ergonomics and durability. With this, Translas offers torch lines that make the daily welding work even easier and more comfortable.

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An excellent grip, solid construction, low weight, high operational reliability and the pleasant manner in which the torches lie in your hand all form the unique characteristics of both lines of torches.
For example, the handles of both welding torches have been fitted with a new ribbed structure with 2K rubber inlays, which provide an optimal grip on the torch and moreover the torch has been given a unique design. As a result, the introduction of the new line of torches immediately received a very positive response.

The new 8XM MIG welding torch line is comprised of 15 different types, up to a 380 ampere gas-cooled torch and a 550 ampere water-cooled torch. In addition to the grip, the MIG welding torches of the 8XM line have also been equipped with a switch that is 30% larger, enabling easier switching.
The high cooling capacity of the Translas MIG welding torches due to the unique construction of the swan necks has always been a distinguishing feature. Translas additionally claims to achieve 15% better cooling than with traditional swan necks.

Due to their use for more detailed welding work, the feel with which TIG welding torches lie in the welder&#;s hand is always a deciding factor. During the design of the new 8XT TIG welding torch line, Translas has fully placed the focus on ergonomics. This has resulted in a handle that has been ergonomically designed down to the smallest detail in order to provide the welder with the greatest possible comfort and to eliminate any tension in the wrist or fingers. For this, among others additional grip lines have been added at both the bottom as well as the top side, a bump at the bottom side lies between the thumb and index finger, as a result of which more stability is provided in each welding position.

An additional striking innovation is the possibility of rotating the torch body to three positions: straight as well as 45 degrees to the left and right. In this manner, it is possible to also reach areas that are difficult to access when welding.
In order to increase durability and operational reliability even further, Translas has also optimally shielded the PCB module in the machine contact, preventing the disruptive influence of high frequencies and contamination.

The new torch lines 8XM and 8XT will be delivered worldwide in more than 50 countries via a select dealer network.

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