(1) Solution Overview

After long‑term operation of rail transit vehicles, key running‑gear components such as wheelsets, bogie frames and axle boxes are prone to surface paint aging, rust, oil contamination and dust accumulation. Cleaning operations including paint stripping, derusting, degreasing and dust removal are required during maintenance. Conventional cleaning methods generally suffer from severe dust pollution, risks of substrate damage to workpieces, heavy reliance on manual labour, low operating efficiency and inconsistent cleaning quality. Targeting the maintenance scenarios for rail transit wheelsets and key running‑gear components, this solution integrates multiple intelligent cleaning systems to accomplish paint stripping, derusting, degreasing and dust removal in one stop, enabling fully‑automated and eco‑friendly full‑process maintenance for rail transit vehicles.

(2) Core Functions / Solution Composition

Integrated with multiple intelligent cleaning systems that can be flexibly combined according to maintenance processes, this solution delivers one‑stop cleaning for wheelsets, bogie frames, axle boxes and various running‑gear workpieces:

1. Fully‑automatic Wheelset Laser Paint‑stripping & Derusting System: Efficient removal of paint layers on wheelsets

2. Intelligent Component Laser Paint‑stripping & Derusting System: Precision paint and rust removal for components

3. Axle‑box Inner‑wall Laser Paint‑stripping & Derusting System: Removal of oil stains and rust on inner walls

4. Intelligent Bogie‑frame Laser Paint‑stripping & Derusting System: Paint removal from weld seams and gaps of bogie frames

5. Intelligent Bogie‑frame Dry‑ice Cleaning System: Overall dry‑ice cleaning for bogie frames

6. Intelligent Bogie‑frame Water‑cleaning System: High‑pressure water washing for bogie frames

7. Wheelset Water‑cleaning System: High‑pressure water washing for wheelsets

8. Ultrasonic Cleaning System: Ultrasonic cleaning for precision workpieces

9. Hand‑held Laser Cleaning System: Portable and flexible cleaning for diverse scenarios

(3) Technical Highlights / Differentiated Advantages (Key Indicators)

1. Centralized and Well‑planned Layout: Paint‑stripping and derusting zones are centrally and integrally arranged with a compact and orderly layout, improving site utilization and streamlining workflow routes.

2. Eco‑friendly Performance: Adopting advanced laser treatment throughout the whole process, it generates no dust or chemical pollution.

3. Substrate‑safe Treatment: The laser process features high safety and causes no damage to workpiece substrates.

4. Intelligence and High Efficiency: One‑stop integration and full‑process maintenance realize standardized, intelligent and intensive maintenance production.

5. Digital Management: Equipped with a visual digital management system, it enables real‑time visualization and traceability of operating conditions, process parameters and cleaning‑inspection data.

(4) Application Cases

The equipment has been deployed in cities including Shanghai, Guangzhou, Shenzhen, Chongqing, Xi’an, Nanjing, Hangzhou, Xiong’an, Suzhou, Xuzhou, Changzhou, Changchun, Ningbo, Jinhua and Jiaxing.

（5）Customer Value: This solution enables rail transit maintenance enterprises to achieve automation, greenization, and intelligentization of cleaning operations, thereby eliminating the challenges posed by traditional cleaning processes—such as dust contamination, chemical pollution, and inefficient manual labor. It significantly reduces labor costs and physical workload, shortens maintenance cycles, enhances maintenance quality and production capacity, and empowers enterprises to achieve standardized, intelligent, and intensive green maintenance production.