Seam Welding Process

Seam Welding Process

A seam is produced by overlapping spot welds. The seam welding machine is, therefore, similar to a spot welding machine. But in the seam welding machine, the electrodes are in the form of copper rollers. The two work pieces which are to be joined pass between the rollers. The rollers exert a pressure on the work piece and also rotates the same time. This helps in automatic feeding of the work pieces. The rollers are connected to the secondary winding of transformer but the current passed through the rollers is a pulsed or intermittent one. This results in a successive series of spot welds being made. If the spot welds are overlapping, a seam weld is created.