A car sheet metal master told me what to do if a big hole is smashed in the roof of the car.

Sheet metal, if it is serious, replace it.

Automobile sheet metal is a technical means of automobile repair. In this aspect, automobile sheet metal is equal to automobile sheet metal repair. It refers to the repair of the car body after a collision, that is, in addition to anti-corrosion and decoration of the car body. All work except spraying. Such as automobile body damage analysis, automobile body measurement, automobile body sheet metal shaping, stretch correction, stress relief welding, and automobile body accessories assembly and adjustment, etc.

Automobile sheet metal is a processing method for automobile maintenance, also called cold work. To put it bluntly, if the appearance of the car body is damaged and deformed, the sheet metal process is required. Automobile collision repair has developed from the original "smashing, pulling and welding repair" to secondary body manufacturing and assembly. The repair of a vehicle in a collision accident is no longer a simple matter of banging on the sheet metal of the car. The quality of the repair cannot rely solely on observing the appearance and gaps of the vehicle with the naked eye. Maintenance personnel must not only understand the technical parameters and dimensions of the car body, but also master the material characteristics of the car body, the transfer of force characteristics, the deformation trend and stress points of the car body, and the production process of the car body, such as welding processes. On the basis of mastering this knowledge, maintenance personnel must also use advanced measurement tools and precise three-dimensional measurements of the vehicle body to determine the direct and indirect damage and deformation of the vehicle body, as well as the hidden dangers due to vehicle body deformation, and formulate a complete vehicle body. The repair plan is then combined with the correct repair technology and accurate three-dimensional dimensional data of each key point to restore the key points of the car body to its original position and restore the damaged car body to its factory state.