What do you learn about car sheet metal painting? What are the steps required for automotive sheet m

The automotive sheet metal painting major is divided into two modules: sheet metal and painting, and the study time is 2 months. Studying this major is still very promising, and now many skilled jobs are in short supply, and there are many opportunities to get high salaries.

Automobile sheet metal is the repair of the iron plate of the car, such as the door and the front hood.

From basic courses to professional compulsory content, you also need practical training to learn the technology.

Sheet metal is actually very knowledgeable, basic car modification, made of chimneys, dustpans, air conditioning pipes, flange shelves, etc., many of which are classified as sheet metal, automobile sheet metal is mainly used for disassembly and assembly (not involving the engine), basically all sheet metal work, surface repair, girder correction, electric welding (electric welding machine, oxygen protection welding), gas welding, argon arc welding, instruments used, sheet metal repair machine, oxygen protection welder, girder calibrator, ground gossip, etc., the factory equipment with good conditions is all over the place, and the work is also happy, and some second-class auto repair plants It's pitiful, there is no equipment, and the time to work is doubled to complete In the field of car repair, the sheet metal is the most, first of all, when you repair, you have to flatten it, otherwise the painter doesn't want to scrape the putty, the girder is not well corrected, and the machine repair is found to be resonant, and the engine is installed to produce resonance, and the master leads the door to practice, and it depends on the individual, and he is diligent and flexible, and the brain is flexible, and you will be the master in the future, I am in Beijing, and now the sheet metal master gets about 4,000 in the second class, and the 4S shop is profitable, and the auto repair factory gets a commission, and the more you do, and you get more believe in yourself, I am also sheet metal, and it is fun to go to work every day, and I wish you success.

1. Sheet metal correction. It is to do the preliminary shaping work for the automobile sheet metal painting;

2. Scraping ash (molding). After the sheet metal correction of the car body, there are some defects that can not be compensated for by sheet metal work, even if it is replaced with new parts, there will be unsatisfactory **, in order to achieve more and more perfection, it is necessary to compensate for the defects with the process technique of sculpture;

3. Automobile sheet metal painting: We usually divide the automobile sheet metal painting into 3 steps;

a. First primer: fill the sand marks and micropores at the bottom of the workpiece, increase the adhesion of the lower coating, and also have the effect of defect indication. -

b. Primer: Prepare a well-lubricated working surface for the topcoat, complete the last process of all primer work, increase the adhesion of the participating layer and have a certain isolation effect, so as to ensure that the quality of the topcoat is not disorderly.

c. Topcoat: Topcoat is divided into single-layer paint and multi-layer paint, which is the color determination layer and the decoration maintenance layer.

4. Sheet metal spray paint finish.

Extended Materials. Painting problems.

Dry grinding, wet grinding. Problem: In the painting process, it is very important to treat the surface of the car body that needs to be repaired, if it is not treated well, not only the surface will feel rough and uneven, but also bring repair, which will directly affect the satisfaction of the car owners with the service. As an important process in sheet metal spray maintenance, the traditional wet grinding process was used for surface treatment in the past, and the quality hazards brought by this process method are increasingly exposed.

Measures: Surface treatment using a full dry grinding process in the model store. The grinding method of pneumatic tools or electric tools used in "dry grinding" can not only effectively absorb the dust generated in maintenance, but also improve maintenance efficiency and ensure the effect.

Masking materials. Problem: Covering areas that don't need to be painted with newspaper is a common sight and a common phenomenon in the industry. Strictly speaking, the lead ink on the newspaper may penetrate into the surface of the car's paint surface during the high-temperature painting process, resulting in a clear "trace" on the car surface, affecting the beauty of the car and even causing color damage.

This "consequence" is unacceptable to consumers.

Measures: In order to put an end to such non-standard operations, sheet metal painting staff must use anti-static masking paper to cover the non-operating parts of the body, so that when painting, not only will not leave traces on the car surface, but also very clean and hygienic, to ensure the quality of the final painting, to maintain the consistency of color to the greatest extent.

When spraying the base color, the base color needs to be both thin and smooth.

Spray varnish, after the background color is dry, the first time must be sprayed must be even, the paint can be slightly thinner, and the air pressure needs to be larger, the fan surface should also be large, do not spray too thick, as far as possible do not appear to lose the phenomenon of the gun, in order to show the gloss as well. Intermediate dry spraying is applied a second time according to the actual temperature. The second coat of varnish is basically the same as the first coat, but the lance movement should be significantly slower, and the lacquer can be slightly drier than the first coat.

Third, the gray spots of the base color are controlled to a minimum.