First, the preliminary plastic work
As we all know, how does a twisted body set off the brilliance of paint? To put it bluntly, it is to restore the deformed parts, including the body shell and chassis girder. At present, the sheet metal correction 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 material characteristics of the car body. The stress characteristics convey the deformation trend, stress points and production technology of the car body. Such as welding process. On the basis of mastering these knowledge, maintenance personnel should also use advanced measuring tools and accurate three-dimensional measurement of the car body to judge the direct and indirect damage and deformation of the car body, formulate a complete car body repair plan, and cooperate with the correct car body repair plan to restore the key points of the car body to the original position.
Second, scraping and shaping.
There are still some irreparable defects in the car body after sheet metal correction, even if new parts are replaced, there will be imperfections. In order to be more perfect and accurate, we must use sculpture skills to make up for the defects. After the car is damaged due to deformation and other reasons, its flatness, wheel angle and lines need to be scraped and rebuilt. Scraping ash = restoring body skin = mold product = mold processing program. Any car body skin is stamped by a mold, and repairing the car body skin is just like repairing the mold, so our scraping and shaping process should be consistent with the mold processing. Many painters who have worked for many years will sigh that it is easy to spray a car well, but it is difficult to do a good job, and it is difficult to grind a ball of ash in ten years. The person who said this may really know what car painting is.