resistanssvetsning

Resistanssvetsning, also known as resistance welding, is a welding process that joins materials, usually metals, by using the heat generated from the resistance to the flow of electric current. This process does not require additional filler material, as the pieces being joined are themselves the source of the material.

The welding is done by forcing the two surfaces to be joined together under a large pressing force, which causes them to fuse. The electric current flows through the metal, generating heat due to the resistance to the flow of electricity. This heat melts the surfaces, creating a bond. The process is typically used for joining thin sheets of metal, such as in the automotive industry for assembling car bodies.

There are several types of resistanssvetsning, including spot welding, projection welding, seam welding, and upset welding. Each type varies in the method of applying the pressure and the shape of the electrodes used.

Resistanssvetsning has several advantages, such as being a quick and efficient process, requiring minimal equipment, and being suitable for automated production. However, it also has limitations, such as being less suitable for welding thicker materials and being dependent on the cleanliness and conductivity of the surfaces being joined.

The quality of the weld is influenced by various factors, including the pressure applied, the electrical current used, the time of the weld, and the properties of the materials being joined. Proper control of these parameters is crucial for achieving a strong and reliable weld.