Drawn Arc Stud Welding
DA Stud Welding
Drawn Arc stud welding (also known as DA stud welding) achieves very strong penetrative welds on materials of 2mm thickness and above. DA products are really the only choice for stud welding large diameters and they can tolerate surface curvature and imperfections such as light rust, grease, and scale. The Drawn Arc stud welding process provides a supremely neat and controlled weld fillet and is suited to multi-gun applications.
DA Welding Process
The Drawn Arc stud welding process involves setting current and weld time, lifting a stud to a pre-set height, then using the pilot arc the lifting causes to create a molten pool in the plate. Return spring force then forges the stud into the molten pool; the process requires a ferrule to contain the molten metal and shape the fillet.