Spot Welding Machine Manufacturers & Suppliers

A spot welding machine is a device for joining two or more metal sheets that overlap. The method uses resistance spot welding. Two copper alloy electrodes clamp the metal sheets together. Pressure is applied. High electric current passes through where the metal touches. The electrical resistance makes heat in a small area. Metal melts. Metal joins at spots without more material. After the current stops, the electrodes stay a short time. This lets the melted metal become solid. A weld forms. It is shaped like a button and called a nugget. In places like car factories, sheet metal shops as well as electronics companies spot welding machines see widespread use. They are fast work well next to can be automated. The equipment has a transformer, electrodes in addition to a control system. It controls parameters of welding like current, time along with electrode force. For metals that do not conduct heat well, like low-carbon steel, the process works very well. It is good for joining thin sheets of around 0.5 to 3 mm thick.