Pretreatment method of electric vehicle paint spraying

Abstract

The invention discloses a pretreatment method of electric vehicle paint spraying. The pretreatment method comprises the following specific steps of: (1) surface cleaning, to be specific, washing a shell needing to be subjected to paint spraying by using clear water, then soaking the shell in a defatted powder water solution, and washing by using the clear water; (2) rust removal by neutralization, to be specific, putting the shell cleaned in the step (1) in a special acid solution, carrying out ultrasound treatment, washing by using clear water, and ensuring that the pH value of the surface of the shell is in a certain range; (3) phosphorization, to be specific, putting the shell treated in the step (2) in a phosphatizing agent solution, heating and soaking, heating again and slowly turning over the shell; and (4) drying and cleaning, to be specific, putting the shell treated in the step (3) in a drying machine, and taking out the shell after drying the shell, and uniformly purging the surface of the shell by using clean air after naturally cooling. The pretreatment method has the beneficial effects that a system is reasonable; the treatment method is careful and strict; parameter setting meets treatment requirements; and the treated shell can cause paint and the shell to be combined more tightly in a paint spraying process and flaws such as unevenness to be less likely to occur.

Description

technical field [0001] The invention relates to the technical field of electric vehicle manufacturing, in particular to a pretreatment method for painting an electric vehicle. Background technique [0002] Electric vehicles are green and environmentally friendly vehicles that use electric energy to drive, and they are also the development trend of energy use in vehicles in the future. With the development of battery technology, electric vehicles have become more and more accepted by consumers and become a mainstream vehicle. [0003] Electric vehicles, like other motor vehicles, need to be exposed to the sun and rain outside, so they also have high requirements for the quality of the paint on their shells, and the quality of the paint has a large part of the impact on the quality of its pre-treatment process , Usually the pre-treatment is relatively simple and not taken seriously, the quality of the later painting will be seriously affected. Contents of the invention [0...

AI Technical Summary

Problems solved by technology

[0003] Electric vehicles, like other motor vehicles, need to be exposed to the sun and rain outside, so they also have high requirements for the quality of the paint on their shells, and the quality of the paint has a large part of the impact on the quality of its pre-treatment process , usually the pre-treatment is relatively simple and not taken seriously, the quality of the later painting will be seriously affected