projektionsvätskutrymmen

Projektionsvät, often translated as projection welding, is a resistance welding process used to join two or more metal parts by applying pressure and heat. It is characterized by the use of pre-formed projections or bumps on one of the workpieces. These projections are strategically placed to concentrate the current and heat flow to specific points, allowing for controlled fusion.

The process typically involves placing the workpieces between two electrodes in a welding machine. As the electrodes close, they apply force, and an electric current is passed through the workpieces. The projections, having a smaller surface area than the rest of the workpiece, heat up rapidly due to increased electrical resistance. This localized heating causes the projections to melt and collapse.

Simultaneously, the applied pressure forces the molten metal to spread and intermingle with the opposing workpiece, forming a weld nugget. Once the current is switched off and pressure is maintained for a short period (forging time), the weld cools and solidifies, creating a strong bond.

Projektionsvät is advantageous for joining parts with irregular shapes, dissimilar thicknesses, or when precise weld location is crucial. It offers excellent control over weld size and strength, and the projections can be designed to control the location and deformation of the weld. Common applications include joining nuts, studs, brackets, and other components in automotive, appliance, and electrical industries. The process is highly repeatable and suitable for automated manufacturing.