The point of application of welding machines in the Automotive Industry

Spot welding is a process in which metal surfaces are joined by the heat obtained from resistance to electric current flow. Workpieces are held together under pressure by electrodes. Generally, the leaves in the range of 0.5-3.0 mm in thickness. This process uses two shaped copper alloy electrodes to concentrate welding current into a small “see” and to simultaneously clamp the sheets. Large flow through the extrusion zone and form a mass of molten solder. The attractive feature of spot welding is a lot of energy can be sent to a place in a very short time. What’s going allows welding without overheating the rest of the sheet.

The amount of heat (energy) that is sent to the location specified by the resistance between the electrodes and the duration of the current widespread area. The amount of power that can be selected according to the properties of the sheet material, thickness and type of electrodes. Applying too little energy metal does not melt or make a bad weld. Applying too much energy will melt too much metal, eject molten material, and made a hole in the welding area. Another attractive feature of spot welding is the energy delivered to the area can be controlled to produce reliable welds.

Spot welding is typically used when the type of welded metal sheets. The thicker the action more difficult to see the details of the flow of hot metal around easier. Spot welding is easily identified in many metal products, such as metal cube. Aluminum alloys can be spot welded, but the thermal conductivity and high electrical power requires higher welding currents. A bigger, more powerful and more expensive welding transformers are needed.

The most common application of spot welding is the automobile manufacturing industry, where it is used almost everywhere to attach sheet metal to build cars. Spot welders are also fully automated, and many of the industrial robots found on assembly line welding in situ.

Spot welding is also used in the dental clinic, where small-scale welding equipment is used when resizing metal point “molar bands” used in orthodontics.

Another application is spot welding straps to nickel-cadmium cell or nickel metal hydride batteries do.