Resistance Seam Welding

In seam welding, you press the sheet metal together with two rolling electrodes and send current through the contact point. This creates overlapping individual points that form a continuous, tight seam. The setting of current, rolling speed, and electrode pressure must be coordinated – too much heat deforms the sheet, too little gives no clean fusion. Especially with coated or thin sheets, you have to be careful not to damage the surface. Clean electrodes and even feed are the be-all and end-all for a proper result.