What are the details of the four major processes of the automobile?

The four major automobile processes are introduced, and the details are as follows: 1. Stamping: Sheet metal parts are stamped and formed with dies according to design requirements. Stamping process plays an important role in the manufacturing process of automobile body, especially the large-scale panels of automobile body, because most of them are complex in shape, large in structure and size, and some of them are curved in space, which requires high surface quality. 2. Welding: Weld the sheet metal parts into a white body according to the design requirements. Welding technology and welding method should be determined according to the material, brand, chemical composition, welding structure type and welding performance requirements of the welded parts. 3. Painting: pretreatment, primer and topcoat of white body. Automobile painting process can be generally divided into two parts: first, the surface treatment of metal before painting is also called pretreatment technology; The second is the construction technology of painting. 4. Final assembly: Assemble all internal and external accessories such as the engine to the car body, and finally become a complete car. After all the indicators are tested, the vehicle is completed.