What is projection welding?
Projection welding is a change in the process of welding of spots, in which the projections on one or both leaves located and concentrated welding energy. This technique allows closer weld gaps on stronger materials than can be possible in a conventional approach. Projection welding is commonly used to attach connectors, such as studs and nuts to set up sheet, especially in the automotive industry. Materials suitable for projection welding process include aluminum, low carbon steel and stainless steel. This causes localized melting of both materials, creating a "point" welder. The screen welding uses the same basic principle, but uses a shallow projection on one or both surfaces at the welding points. These projections are facing inwards towards the inner surfaces of the welding leaves and concentrate heat -converted during the weld discharge. This maximizes the melt potential and allows you to weld thicker materials with the same current settings.
Projection in workpieces are usually a spherical or blunt conical cross -section. If both leaves are stamped, carefully calculated projections ensure precise indexing. Projections are also often used to accurately align the workpieces. As with a conventional welding beam, rotating electrodes are maintained static, while between them are advanced workpieces. In advance, the speed must be carefully adapted to ensure that the projection corresponds to the timing of the arc of welding as they pass between the electrodes.
Automotive construction uses extensive projection welding in the assembly of body pelvis. Connector points such as integral nuts and pins used to attach seats, dashboards, seat belt and interior lining are generally connected by projection welding. This technique also offers another advantage of minimal shrinkage and distortion at the weld site. Workpieces after production are easier to do notbo have a small grinding or completion. Materials of different thicknesses are also easier to weld this method.
screen welding is a suitable process for a number of metals including low -carbon steel, stainless steel and aluminum. Increased efficiency means that sheet thickness of up to 0.125 inches (3 mm) can be successfully welded. This process has several disadvantages, such as the next steps in the manufacturing process and limiting the materials that can be used. However, the advantages generally outweigh the disadvantages; The screen welding is a good alternative to conventional welding on the spot.