Automotive sheet metal is a technical means of car repair. In this respect, automotive sheet metal is equivalent to automotive sheet metal's repair, which means that the car body should be repaired after a collision, that is, all the work except the anti-corrosion and decorative spraying of the car body. It is a processing method of automotive sheet metal in automobile maintenance, also called cold working. If the appearance of the car body is damaged and deformed, the sheet metal process is needed. Automobile collision repair has developed from the initial "smashing, pulling, welding and repairing" to the secondary manufacturing and assembly of the car body. The repair of collision vehicles is no longer a simple automotive sheet metal, and the quality of repair can not be observed only by naked eyes. Maintenance personnel should not only know the technical parameters and dimensions of the car body, but also master the material characteristics of the car body. The stress characteristics are the transmission of the deformation trend of the car body, the stress point and the production process of the car body, such as welding process. Main processes of sheet metal processing in automotive sheet metal: The main processes of sheet metal work can be roughly divided into: body disassembly, body correction and body repair-and each different process can be subdivided into several processes. In the in-depth explanation, we must talk about two concepts, the first is the type of automobile work, and the second is the automobile body. The auto repair industry can basically be divided into mechanical repairman, electrical repairman, sheet metal repairman, paint repairman, other accessories, beauty and special repair industry. For the division of automobile body, that is to say, the whole automobile circuit computer system, engine-driven brake steering system, the paint has been removed, and the rest is the automobile body. Body assembly (this is a general term for accessories) includes: body sheet metal parts (metal parts), automobile glass, lamps, interior and exterior decorative parts and handles, seats and accessories, car lock mechanism, window sealing and lifting mechanism, doors and front and rear sail covers.