Can I observe the welding process with a camera, doesn’t a trailing gas nozzle obstruct the view?
Depending on the angle and position of the camera, it is possible to observe the process. In addition, a cut-out or a sight glass can be inserted into the trailing gas nozzle if a larger viewing area is required.
Can I work with filler wire or does the trailing gas nozzle block the path?
Trailing gas nozzles can be designed in such a way that the welding wire can be fed in without any problems.
Can trailing gas nozzles be used for forming?
Yes, trailing gas nozzles can also be used for forming, e.g. in pipes or along joints. Sufficient space must be available so that the nozzle can be carried along. Particularly with large components, where a large volume needs to be formed, trailing gas nozzles offer the advantage of protecting the hot area locally around the seam more quickly and with less gas, instead of having to purge the entire area for a long time.
What are the advantages of trailing gas nozzles compared to standard nozzles?
Trailing gas nozzles offer improved shielding gas coverage. This leads to a reduction in oxidation (annealing colours), which is particularly important when welding stainless steel or titanium. Unwanted changes to the component, such as pores in the seam and burn-off of alloying elements, are minimised. The nozzles are designed to distribute the shielding gas more efficiently and evenly around the welding point, thereby keeping the oxygen away from the heat-affected zone on the component.
What are the advantages of additively manufactured trailing gas nozzles compared to self-built ones?
Our trailing gas nozzles are very robust and durable. They are equipped with wear parts to withstand the thermal loads during welding as well as spatter, fumes and dirt. In addition, our nozzles can be designed with or without cooling, depending on the operating conditions. Furthermore, the gas distribution in the trailing gas nozzles and the outflow from the nozzle have been optimised using modern flow simulation methods so that the nozzles provide a laminar shielding gas film as quickly and efficiently as possible.
Do you offer trailing gas nozzles with cooling?
Our trailing gas nozzles can be customised, even from a quantity of just a single piece. Integrated cooling channels are particularly recommended for use with high currents or laser power.
How high is the gas consumption? What adjustments can be made?
Depending on the size of the trailing gas nozzle, the gas consumption is approximately between 20 and 40 litres/min. With this amount of gas, a much larger area can be covered on the component than is possible, for example, with welding torches with large gas lenses.
How long can a trailing gas nozzle withstand the stresses of use?
Our drag gas nozzles are not wear parts, but are designed for continuous operation. There are replaceable wear parts in the nozzle body that can be replaced if they become heavily stained (e.g. by welding spatter).
How do I choose the right shielding gas system for my specific welding requirements?
OSCAR-PLT can select the right nozzles for you. The size and geometry of the nozzles can vary greatly depending on the process. Our service includes process analysis, welding tests, nozzle design, structural integration and on-site commissioning. The selection of the right nozzles depends on several factors, including the material to be welded, the welding process used and the system environment.