Roll Seam Welding

Roll seam welding is a resistance welding operation.

It involves the use of electrodes in the shape of rotational wheels. During a roll seam welding process, the wheel-shaped electrodes apply pressure on the metal surfaces that are to be joined. On the application of current, the metal in between melts and create a weld nugget. While the pressure is applied constantly, the application of current may vary resulting in different kinds of weldments. If the current is constant, there is a continuous weld seam. If it is turned on and off at a specific frequency, overlapping weld nuggets are acquired. Decreasing the frequency further produces weld nuggets with small regular distances in between.

Roll seam welding permits the production of airtight joints. Automobile mufflers, fuel tanks, and similar sheet metal containers are some of the common applications.