Sheet metal painting is a kind of automobile maintenance technology. It is to repair the deformed part of the automobile metal shell and restore it to its original state. Then by spraying special paint, the surface of the metal shell at the repaired position is as bright as other intact places.

After body sheet metal rectification, there are still some defects that sheet metal can't remedy. Even if new parts are replaced, there will be imperfections. In order to be more perfect and accurate, we must make up for the defects through sculpture technology. After the car is deformed and damaged for other reasons, its flatness, wheel angle and lines need to be scraped and polished. This formula shows that scraping = recovery of body skin = mold product = mold processing program, while automobile

Automotive sheet metal painting is usually divided into three steps:

< 1 > first primer

Filling the sand marks and micropores at the bottom of the workpiece increases the adhesion of the lower coating and also has the function of defect indication.

< 2 > perfusion.

In the very important painting part, a complete and smooth working surface is prepared for the topcoat, and the last procedure of all primer work is completed, which increases the adhesion of the intermediate layer and has a certain isolation effect, ensuring the quality stability of the topcoat.

< 3 > topcoat

Top coat is divided into single-layer paint and multi-layer paint, which is a color fixing layer and a decorative protective layer. Single-layer paint is commonly known as plain paint, also known as ordinary paint, and can be completed in one layer. Multi-layer paint is divided into silver powder series paint and pearlescent series paint, which is completed by two-layer and multi-layer construction technology. Silver powder paint adopts special aluminum material, which has high protection, strong outdoor stability and strong observability. Pearl series paint is made of mica and shells through high technology, which is a kind of high-grade paint with rich colors and strong decoration.

Because the car is a high-precision whole. Moreover, electrical accessories and mechanical accessories should be attached to the corresponding positions of the car body with high precision and low error. Even the straightness and curvature of car paint (which greatly affects the beauty of car body) are highly dependent on the error value of car body sheet metal. Therefore, sheet metal body and its repair have become a purely manual work in the automobile industry without hard standards, automatic tools and intuitive teaching.