Fully Automatic Wheelset Laser Cleaning Equipment | Fully Automatic Wheelset Laser Paint and Rust Removal Equipment-DITT (Hangzhou) Technology Co., Ltd.

Fully Automated Wheel Set Laser Paint and Rust Removal Equipment

Automated laser paint and rust removal for efficient, non-destructive wheelset cleaning.

The equipment employs a through-type design, utilizing a composite laser system and three-axis or six-axis robots to efficiently remove paint, rust, and oil contaminants from urban rail vehicle axles, dust-proof plate seats, and inner and outer wheel rim plates of wheelsets. The smoke and dust generated during the cleaning process are purified by a dust purification system before direct discharge, enabling efficient, environmentally friendly, and non-destructive cleaning.

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Solution

For scenarios involving paint removal and rust elimination during major overhauls of wheelsets in rail transit depot facilities, we provide a turn-based fully automated laser cleaning integrated solution. This solution is compatible with existing wheelset transfer systems and integrates a composite laser cleaning system, three-axis/six-axis robots, a dust extraction system, and an intelligent re-inspection module. It replaces conventional sandblasting and manual grinding processes, addressing key limitations of traditional methods—such as high environmental pollution, low operational efficiency, and severe damage to the substrate material. The equipment supports all wheel diameters from φ600 to φ1250 mm, features adaptive laser power regulation, and can be deployed across diverse rail transit applications, including metro, light rail, high-speed rail, and heavy-haul railway systems.

Model

3-axis Robot Version

Designed for routine maintenance scenarios of conventional metro wheelsets. Equipped with a three-axis motion mechanism, it offers high cost-performance and meets the basic cleaning requirements for standard wheelsets.

Six-axis robot version

Suitable for overhaul scenarios involving complex wheel sets and thick paint layers. Equipped with a six-axis industrial robot, it offers enhanced flexibility, enabling it to handle complex wheel set contours as well as the cleaning of thick paint layers and deep rust stains.

Custom Enhanced Version

Designed to operate in specialized environments, such as those characterized by extreme cold and high humidity. Protective enhancements have been implemented for these specific operating conditions to ensure stable operation in extreme environments.

Overall Technical Parameters

Technical Specifications	3-axis Robot Version	Six-axis robot version	Custom Enhanced Version
Comparison of Available Models	Suitable for routine daily maintenance of metro wheelsets.	Suitable for complex wheel sets and major overhauls of frames with thick paint coatings.	Suitable for special operating conditions, such as extreme cold and high humidity environments.
Cleaning Process	Composite laser cleaning	Composite laser cleaning	Composite laser cleaning
Robot Configuration	3-axis and 6-axis robots are available as options.	3-axis and 6-axis robots are available as options.	3-axis and 6-axis robots are available as options.
Applicable wheel diameter range	φ600-φ1250mm	φ600-φ1250mm	φ600-φ1250mm
Standard cleaning time per wheel	15 minutes	15 minutes	15 minutes
Removable paint film thickness	≤400μm	≤400μm	≤400μm
Degree of substrate damage	＜1μm	＜1μm	＜1μm
Environmental emissions	0 chemical agents, 0 VOC emissions	0 chemical agents, 0 VOC emissions	0 chemical agents, 0 VOC emissions
Overall automation rate	98%	98%	98%

Working Principle

(1) Introduction: The equipment utilizes a high-energy composite laser beam to irradiate the surface of the wheel set, instantly heating, vaporizing, decomposing, and peeling away the surface paint layer, rust, and oil contaminants, thereby achieving non-contact cleaning. In conjunction with a vision-based positioning system and a three-axis or six-axis robot that guides the laser head along the contour of the wheel set, the system ensures precise coverage of the entire cleaning area; it is also equipped with a dust and smoke purification system that collects and treats generated particulate matter in real time, operates entirely without chemical consumables, and exerts no mechanical force on the substrate material. (2) Process Flowchart: AGV loading & transfer → Vision-based positioning & identification → Laser parameter matching → Robot-coordinated cleaning → Dust & smoke purification & collection → Intelligent performance re-inspection → Qualified product discharge

Why Choose Us

Fully unmanned end-to-end operation

Supports full-process automation of AGV-based material handling, cleaning, and re-inspection, reducing labor costs by 85%, and is compatible with batch maintenance assembly lines in depot environments.

Micron-scale non-destructive peeling

Non-contact laser cleaning results in substrate damage of less than 1 μm, prevents wear of the substrate by the cleaning wheel assembly, and can extend the service life of the wheel assembly to up to 10 years.

Zero chemical pollutant emissions

No chemical agents are used throughout the process, achieving a 100% reduction in VOC emissions and saving over 800,000 yuan annually in hazardous waste disposal costs.

Maintenance efficiency has been significantly improved.

A single cleaning cycle takes only 15 minutes—significantly faster than the traditional 4-hour process—enabling daily production capacity to increase to 120 units.

About Us

Founded in 2018, DITT applies AI visual intelligence to rail transit. Built on our own visual perception algorithms, intelligent hardware and O&M systems, we deliver a full inspection portfolio spanning onboard and wayside applications, now serving 20+ rail transit systems across China.

Together with our subsidiaries — Zhonggang Maintenance, Zhongshu Laser and Yunshang Urban Rail — we are moving rail transit O&M toward predictive maintenance and full-lifecycle management.

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Company Establishment

Invention Patents

Metro Clients Served

0%+

R&D Proportion of Revenue

Latest News

Qiantang District Delegation of Municipal People’s Congress Deputies Visits DITT for Research and Inspection

On August 29, Ruan Chonghui, Party Group Secretary and Director of the Standing Committee of the Qiantang District People’s Congress of Hangzhou, Zhejiang Province, led the Qiantang District delegation on a visit to DITT.

1970-01-01 View Details

DITT Makes a Striking Appearance at MetroTrans 2025 China International Urban Rail Transit Exhibition and CAMET Forum

On September 18, the three-day "2025 China International Urban Rail Transit Exhibition" (MetroTrans 2025) officially opened at the CRCC Qingdao World Expo City.

1970-01-01 View Details

Frequently Asked Questions

What types of wheel sets can this equipment clean?

The equipment is compatible with wheel sets having a wheel diameter ranging from φ600 to 1250 mm, supporting a variety of operational systems—including metro, regional rapid rail, conventional railway, and multiple-unit trains. Customized tooling and cleaning procedures can be developed based on the specific wheel set specifications of the customer.

Will the cleaning process damage the substrate of the wheel set?

No. The equipment employs non-contact laser peeling technology, featuring precisely controllable energy output. The substrate damage is less than 1 μm, and the dimensional accuracy and mechanical properties of the wheel set remain unchanged; furthermore, this process can extend the service life of the wheel set.

Does the equipment require supporting environmental protection facilities?

The equipment features an integrated dust purification system with a dust recovery rate exceeding 98%, zero VOC emissions, and emissions that comply with national atmospheric pollutant discharge standards, eliminating the need for additional large-scale environmental protection facilities.

Can the equipment be integrated with existing maintenance assembly lines?

Yes. The equipment features a modular design and supports integration with existing transfer systems—such as AGVs and roller conveyors—enabling it to be incorporated into the customer's existing maintenance assembly lines to achieve full-process automation.

Is the daily maintenance cost of the equipment high?

The equipment requires no wear-and-tear consumables, features a long service life for the laser, and only necessitates periodic cleaning of the filter cartridge and optical path lenses during routine operation; consequently, its maintenance costs are significantly lower than those of conventional sandblasting equipment.

What are some real-world application cases for this equipment?

The equipment has been successfully deployed in multiple urban rail transit projects, including Hangzhou Line 4, Hangzhou Line 9, Hangzhou Airport Express, Haining Intercity Line, and Suzhou Metro Line 4.