Automotive sheet metal is a processing method of automobile maintenance, also called cold working. To put it bluntly, 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 "welding repair" to the secondary manufacturing and assembly of the car body. Maintenance personnel should not only know the technical parameters and dimensions of the car body, but also master the characteristics of the car body material, the transmission of force characteristics, the deformation trend and stress points of the car body and the production technology of the car body such as welding technology.
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It is a relatively primary method to repair the dent in the car body with boiling water. Generally, boiling water is not needed, and electric guns or solar energy are used to repair dents. Compared with the former, the latter two methods are convenient, stable and fast.
Most of the front and rear bumpers of family cars on the market are made of special plastic materials. Boiling water can restore the sunken car body, and the reason is simple. Plastic will soften when heated, and it can be sprayed out in the concave part as long as it is heated. This principle is actually equivalent to putting a sunken ping-pong ball into hot water, and it will become round again after a while.
People's Network-Car repair is on fire: it takes 10 minutes to repair the dent in the car body with boiling water.
Baidu Encyclopedia-automotive sheet metal