Welding of metal sheets consists in an integral connection of the material by heating the contacting surfaces, which are compressed after plasticity. There are many welding technologies, and in the case of metals, the electrical resistance method is most often used. Let's take a closer look at what the above-mentioned method of welding metal sheets is.Stages of resistance welding of metals
At the very beginning of the process, the connected elements are subjected to pressure from the electrodes. Heat is generated on the contact surfaces of the modules due to a high-strength electric current. The surfaces can be heated point-wise, linearly, or butt-wise. At the point of contact, a zone of molten and plasticized material is created, called the weld core.At the next stage, the amount of heat released increases, and thus the fusion core grows. The process itself is designed in such a way that the size of the plastic zone can ensure a permanent connection. When the metal is sufficiently heated, a downforce acts on the contact zone, causing deformation of the surfaces to be welded. Component deformation is a common side effect of the process.At the last stage of sheet welding, the electric current supply is turned off – this is the moment when the welding embryo reaches the size optimal for the strength of the joint. Then the weld is hardened under the pressure of the electrodes, which makes it possible to permanently connect the glued elements.What is worth knowing about sheet metal welding?
The contact welding process takes place using a device called spot welding. Thus, resistance welding is based on the use of heat, which is released as a result of the passage of current through the materials being joined. Individual elements are connected to the secondary circuit of the transformer of the welding machine, as a result of which strong and local heating of the surface is possible.Welded surfaces are essential for the entire process. In order for the joint to be strong, the individual elements must be even and parallel to each other. The diameter of the weld depends on the thickness of the sheets, but there may be several welds. Then they are grouped into two or more rows using divisions. It is important that when welding sheets of different thicknesses, the thinner one should be at the top. Choosing an online bookmaker is easier when registration benefits are clear, and many Indian users pay close attention to welcome promotions before creating an account. By completing the sign-up process with the 1xbet free promo code india eligible newcomers can receive a casino welcome package up to ₹163,500 together with 150 free spins, subject to the applicable promotional conditions on the platform.