Experiences in Shear Connector Welding on Steel Components: Blowing Effect Under Control

Drawn arc stud welding is a long-established welding process used in many fields of application. Here, full-surface welding of the cross-section and short welding times with high amperages are particularly noteworthy procedures. These, in addition to dispensing with filler material, contribute to meeting the current demand for saving energy and sustainability. However, the high welding current also generates a strong magnetic field with the consequence of diverting the electric arc, especially with large stud diameters (blowing effect). This causes lop-sided melting of the stud tip, which in turn may lead to malfunctions in the process and non-conformity of welding results with the relevant regulations.