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Coating method of impact-resistant coating on the axle surface of crh5g EMU

A coating method and technology for EMUs, which are applied to devices, coatings, special surfaces and other directions for coating liquids on surfaces, can solve the problems of axle hits and the inability of anti-corrosion coatings to meet the operating requirements in sandy areas, and achieve shortened time. The effect of the production cycle

Active Publication Date: 2021-05-25
CRRC CHANGCHUN RAILWAY VEHICLES CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the past two years, high-speed EMUs have been operated in areas with severe cold and sandstorms in China. The axles have been severely hit by sandstorms at high speeds. The original anti-corrosion coating cannot meet the operating requirements of sandstorm areas. The anti-hit material and process protect the axle from wear and hit

Method used

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  • Coating method of impact-resistant coating on the axle surface of crh5g EMU
  • Coating method of impact-resistant coating on the axle surface of crh5g EMU
  • Coating method of impact-resistant coating on the axle surface of crh5g EMU

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Embodiment Construction

[0022] Specific implementation mode 1. Combination figure 1 Describe this embodiment, the coating method of the anti-strike coating on the surface of the CRH5G EMU axle, the specific process of the method is: axle surface cleaning, axle protection, axle spray area grinding, axle surface cleaning, tooling protection, primer spraying, axle , Tooling protection, topcoat spraying and demolition protection.

[0023] 1. Clean the surface of the axle. Use a cleaning paper dipped in acetone to clean the part of the axle to be sprayed until there is no stain on the surface of the cleaning paper. After wiping, the axle surface must be clean, dry, grease-free and metallic before grinding.

[0024] 2. Axle protection, use paper tape and plastic film to protect areas that do not need to be painted;

[0025] 3. Grinding the spraying area of ​​the axle. Use 80# sandpaper to cross-grind the area to be sprayed on the axle. Shows an even sanded texture.

[0026] 4. Clean the surface of the ...

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Abstract

The coating method of anti-strike coating on the surface of CRH5G EMU axles involves the vehicle manufacturing field of high-speed EMUs operating in alpine and sandy areas. Through the development of a new axle coating process, the existing high-speed rotating axles are hit by wind, sand, ice and snow Serious Problem. The process of axle protective painting is: axle surface cleaning, non-painting area protection, axle spraying area grinding, axle surface cleaning, tooling protection, primer spraying, topcoat spraying and removal protection. The method of the present invention applies two-component polyurea coating and thermal spraying process in the spraying process, has determined coating thickness to be optimal thickness design at 3-5mm by impact test; 8Ma; elastic elongation 70‑100% and other performance indicators. Adopt the method of the present invention to be coated with the EMU axle of the anti-stone impact paint, after two years of actual operation of the Lanxin Line, the state verification is intact.

Description

technical field [0001] The invention relates to the vehicle manufacturing field of high-speed EMUs operating in high-cold and sandy areas, and in particular to a coating method for an anti-impact coating on the surface of a bogie axle of a CRH5G EMU. Background technique [0002] As the most important running part of the vehicle, the axle has high protection requirements. In the past, vehicles with ordinary speed grades required only anti-corrosion performance in terms of axle protection. In general, epoxy thick build paint of about 0.3mm can achieve the goal. However, in the past two years, high-speed EMUs have been operated in areas with severe cold and sandstorms in China. The axles have been severely hit by sandstorms at high speeds. The original anti-corrosion coating cannot meet the operating requirements of sandstorm areas. The anti-hit material and process protect the axle from wear and hit. [0003] A new protective coating process has been developed and applied t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05D5/00B05D3/12B05D3/04B05D3/10B05D1/32B05B13/02C09D175/02
CPCB05B13/0228B05B13/0264B05D1/325B05D3/0406B05D3/102B05D3/12B05D5/00B05D2202/00B05D2451/00C09D175/02
Inventor 周志刚
Owner CRRC CHANGCHUN RAILWAY VEHICLES CO LTD
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