How about the sheet metal repair process of EV body?

2019-10-24 14:17:29

Electric vehicle sheet metal parts is a method of electric vehicle maintenance, also known as cold work. If the appearance of the electric vehicle body is damaged or deformed, sheet metal is needed. Now the electric vehicle collision repair has developed from the original "smash welding and pull repair" to the secondary manufacturing and assembly of the electric vehicle body. The following is mainly to introduce the relevant process of the body sheet metal repair of electric vehicles.

1. Sheet metal correction.

This process is mainly the plastic work done before the body and paint of electric vehicles. The distorted body needs to be repaired by many painters.

II. Scraping

After the car body has been corrected by sheet metal, there are still some defects that can't be made up by sheet metal work. Even if new parts are replaced, there will be some imperfections. In order to be more perfect and refined, we must use sculpture technology to make up for the defects. In every damaged part, we need to use scraping to fill and grind out. We repair the car body just as we repair the mold, so we need to integrate the scraping molding process with the mold processing, which is the work that ordinary painters cannot do.

III. automobile body and paint

We usually have three steps for car body and paint:

(1) primer for the first coat: fill the sand mark and micropore on the bottom of the workpiece, increase the adhesion of the lower coat, and also have the defect indication function.

Primer application in (2): This is an important part of the coating. Prepare a complete and smooth working surface for the top coat, complete the next process of all primer works, increase the adhesion of the intervention layer and have a certain isolation function, so as to ensure the quality stability of the top coat.

(3) finish paint: the finish paint is divided into single layer paint and multi-layer paint, which is the color determination layer and decoration protection layer. Single layer paint is generally called plain color paint, also known as common paint, which can be finished in one layer. The multi-layer paint is divided into silver powder series paint and Pearl series paint. It is divided into two-layer and multi-layer paint. The silver powder paint is made of special aluminum material after research, which has high protection, outdoor stability and strong observability.

Therefore, no matter in the surface decoration or bottom protection, the body after sheet metal process has a beautiful appearance, bright as a mirror or smooth surface, no fine impurities, scratches, cracks, wrinkles, blisters and defects visible to the naked eye, and has sufficient mechanical strength. The bottom coating belongs to excellent protective layer, which has excellent rust and corrosion resistance and strong adhesion.