1, determine the scheme

The maintenance technician will determine the maintenance plan of the car according to the degree of damage. If the deformation is serious, the engine, circuit and gearbox can be inspected and repaired. At this time, the master in charge of machine maintenance will inspect, disassemble and repair these parts first.

2, sheet metal correction

For deformed parts, corresponding maintenance equipment is needed to repair them. Generally speaking, cutting, grinding, stretching, fire recovery and oxygen reduction will be carried out in the sheet metal process. Sheet metal should not only restore its original appearance, but also keep the hardness of metal materials as much as possible.

Step 3 Scraping and shaping

With the current technology and advanced maintenance equipment, it is impossible to guarantee the perfection of sheet metal. There will be some defects or repair marks on the car surface after sheet metal. Even if the parts are brand new, there will be some imperfections. At this time, the maintenance master will reshape the waistline of the car body again and adjust its flatness by scraping and shaping. This is a repair work that tests the skills of technicians.

4. Paint the surface

Painting is a job that requires a high working environment and must be dust-free. Moreover, its working procedure is more complicated, which is mainly divided into several links, such as brushing the first primer, brushing the primer when spraying, brushing the primer when grinding, brushing the topcoat and drying the paint surface.

5, paint surface treatment

The last process of sheet metal painting is to treat the paint surface. Even in the 4S shop, using the best equipment and skilled master to repair, there will still be some minor defects in the previous work. Even a little dust in the air will affect the effect of repairing cars. Paint treatment will be done at this time. In order to achieve the effect of mirror smoothness, the most common remedy is to use extremely fine beauty sandpaper or polish with a polishing machine. After the whole process is completed, the part of the car collision is basically the same as the original.