Article

In automobile welding, there are mainly: fusion welding, pressure welding and brazing, they each have their own advantages, and play a unique role in automobile manufacturing. 1. Fusion welding is through heating the base metal to be welded, so that it melts to form a weld, just like two hot metal fusion together, after cooling, they will be closely connected, become a whole. Common fusion welding methods are arc welding, gas welding, submerged arc welding, etc., among which, arc welding uses the high temperature generated by the arc to melt metal, is a very common fusion welding method, in automobile manufacturing, often used in some parts with high strength requirements welding, such as frame and so on. 2. Pressure welding is the application of pressure to achieve the connection between atoms of two objects in a solid state. In this process, the pressure acts like an invisible hand, pressing two objects together so tightly that their atoms come close to each other and eventually join together. Common pressure welding methods are resistance welding, friction welding and so on. Resistance welding is widely used in automobile body welding, pressing two steel plates through electrodes, using the heat generated by the current to melt the contact surface, and then cooling to form a welding point, just like pinning a firm "rivet" on the body.