Welding is the process of using various fusible alloys (soldering) to join metal parts. The melting point of the solder is lower than that of the material to be welded, so that the component will end the welding by intermolecular contact on its surface without being melted. There are many types of welding machines, including single-point single-function, single-point dual-function, and single-point multi-function (this type of welding machine also has only one welding head. After changing the form of the positioning plate, it can be made between 90 ° and 180 ° Angle welding). There are also two-point, three-point, four-point and even six-point welders and four-corner welders. Different types of welding machines have different welding functions and work efficiency.
Welding machines are mainly divided into two types: plastic welding machines and metal welding machines. The applied technologies are mainly ultrasonic, high frequency, plasma, electrothermal, and rotary. The plastic welding machine is used for welding thermoplastic engineering plastic plates or products such as polyethylene, polypropylene, polypropylene, and nylon. During operation, the plastic welding rod is melted and sprayed, and the workpiece to be welded is fused with and bonded. It is widely used in welding and maintenance of plastic equipment, plastic flooring, plastic pipe connection, and plastic bottle sealing. Metal welding machines are mainly for welding metal materials.