What Is Spray Arc Welding — BWS LTD Skip to content
MIG MAG Welding Spray Transfer

What Is Spray Arc Welding

MIG/MAG WELDING: HOW IT WORKS-3

Spray or droplet welding is a type of welding where the welding wire doesn't short with the material (it doesn't touch).  The plasma arc is so high that droplets about the same diameter of the wire used are melted and transferred onto the workpiece.

To create spray transfer you need to turn the voltage quite high as the spray is only possible at high currents (for the wire size)

 Wire Size UK
Wire Size US Welding Current
0.6mm 0.0236" 135A
0.8mm 0.0315" 150A

 

To do this turn your voltage selector up and tune in your wire until you get the traditional crackle sound. Now back the wire off slightly until the crackle cannot be heard. The plasma is so high that each droplet is transferred to the weld pool in a consistent stream.

If a voltage that is too low to transfer the droplets is selected then the smooth transfer is not achievable and it becomes very erratic and "poppy" as it falls on the material to be welded under gravitational force

Spray arcs produce less spatter and higher run speeds so are desirable if the material thickness to welded enables it. 

Therefore because you need this higher current to create the spray its is not possible to use on car body panels.

 

 

 

References

Video is from Fronius Welding UK

 

 

 

Previous article UV Paints, Has The Future of Body Repair Arrived?
Next article Which Gases Are Used In MIG MAG Welding and What Does It Do?

Leave a comment

Comments must be approved before appearing

* Required fields