Application of Precision Parts Coating in Automobile Assembly Process
In the process of automobile assembly, the precision parts produced by the CNC lathe machining center have many exteriors painted with aluminum alloy wheels, bright coating clear paint on the spoke car paint surface, polished coating clear paint, electroplating, etc. The paint colors are as follows: Silver Grey, Sport Silver, Fine Silver, Smoke Grey, Black, etc. Due to the impact of electroplating technology on environmental protection, the application volume is gradually decreasing, and the coating of precision parts is the dominant process.
The production process in the application of precision parts coating in the automobile assembly process, its purpose is to improve the corrosion resistance and aesthetics of the precision parts wheel hub, so as to ensure the quality of the coating, and the production site requires clean dust. Coating methods include manual spraying and automatic spraying. Manual spraying coating thickness and spraying quality are not easy to control. The automatic spraying coating thickness precision is controlled at 10mm, uniform, and the thickness can be adjusted according to customer requirements; The spray gun is equipped with electrostatic spray gun and air spray gun. The former is only suitable for spray painting; the coating process is: pretreatment of precision parts → powder spraying → spraying → spraying transparent powder, special pretreatment of precision parts → painting → transparent powder or pretreatment → spraying transparent powder, but the last two The corrosion resistance of this kind of process coating is less than that of the former.
At present, the advanced technology and equipment is the automatic production line of precision parts pretreatment → powder spraying → painting → spraying transparent powder coating.
The advanced automatic production line for painting is composed of surface pretreatment, drying, electrostatic powder spraying, spraying, curing, etc. The transmission system reaches the level of the aluminum alloy wheel hub in the way of ground chain, and the aluminum alloy wheel hub can be rotated to a good level and matched with There are handling robots, powder recovery systems, powder replacement systems and wastewater treatment equipment. Adopt automatic coating process equipment, adopt electrostatic spray gun and high-speed electrostatic rotary gun technology (speed above 20000r/min), environmental protection chromium-free pretreatment technology, dust removal technology, environmental protection water-based paint technology, due to high production line efficiency, paint saving, environmental protection Well, precision component hub coating technology is a new trend.
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