Thickness distribution of high-pressure airlessly sprayed atomic ash coating for rail vehicles
[Introduction]High-pressure airless spraying is more and more widely used in the application of putty spraying on many parts and components.However,the efficiency and quality of putty spraying on the body of high-speed rail vehicle need to be improved.[Method]A flow field model for atomization of atomic ash paint during its spraying was established,and then used to simulate the thickness distribution of the atomic ash coating sprayed by high-pressure airless sprayer.The effects of the atomizing pressure and flow field on the distribution of coating thickness were analyzed.An experimental platform for high-pressure airless spraying of the atomic ash was built for verification of the model.[Result]The difference between the simulated and experimental results of coating thickness distribution within the core area of the specimen was not larger than 10%.[Conclusion]The film formation model is feasible for analysis of the thickness distribution of airlessly sprayed atomic ash coating.
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