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Beijing Yugu Group Hebei Yuzhou Materials Prefabrication Project is located in Daqinghe Economic Development Zone, Gu'an County, Langfang City. In June 2024, the project selected putty polishing, indoor spraying NP320, indoor spraying NP320 Pro and paint mixing plant for paint engineering construction. The application of multi-machine linkage of decoration robots and robot unmanned automatic feeding technology for fully automatic intelligent construction of robots has better construction efficiency than manual labor, effectively reducing construction costs and labor intensity
Large industrial and prefabricated construction projects involve extensive wall and ceiling finishing work.
Traditional interior finishing depends heavily on manual labor for:
Putty application
Surface grinding
Primer spraying
Topcoat spraying
Material preparation
Material replenishment
Process inspection
When these processes are performed separately by different teams, contractors may face several challenges:
Grinding and spraying require workers to perform repetitive physical operations for long periods.
Putty grinding generates dust, while paint spraying exposes workers to coating mist and other materials.
Manual coating and grinding quality can vary according to individual worker experience and operating technique.
If coating, grinding and spraying teams operate independently, waiting time between processes can reduce overall productivity.
Robots or workers may need to stop when coating material is insufficient or requires manual replenishment.
The Hebei Yuzhou project therefore focused not simply on replacing one manual process, but on connecting several interior finishing operations into an automated workflow.
Advantages of Robotic Construction
Construction Quality: Passed comprehensive project acceptance with flying colors.
Safety and Environmental Protection: Effectively reduces manual labor intensity, minimizes health hazards from dust and paint to workers, significantly lowering the risks of occupational diseases and safety incidents.
Construction Costs: Overall construction costs reduced by approximately 16%.
Operational Efficiency: Single-pass putty application (1 machine), comprehensive efficiency of 60㎡/h; putty grinding (1 machine), comprehensive efficiency of 45㎡/h; single-pass indoor painting (1 machine), comprehensive efficiency of 135㎡/h.Intelligent Construction: Fully Automated Robotic Construction Operations enable multi-robot collaboration between interior decoration robots and supporting robots. These systems can automatically sense and respond to information such as material shortages, replenishment needs, arrival points, and surplus material monitoring, thereby conducting automatic replenishment and refueling to achieve fully automated, unmanned robotic material replenishment.
BrightMaster deployed multiple robots to handle different stages of interior wall finishing.
The overall workflow can be organized as:
Putty Application → Putty Grinding → Primer / Paint Spraying → Automatic Material Replenishment
Through coordinated construction, individual robots perform different operations while supporting equipment manages coating preparation and material supply.
BrightMaster's current Interior Decoration Solution is designed around this type of multi-machine cooperation, allowing different robots to support spraying, coating and other finishing processes.
The Indoor Coating Robot NP320 Pro can perform both putty coating and latex paint coating on interior walls and ceilings.
For the Hebei Yuzhou project, this capability helps automate an important stage before grinding and final painting.
The robot uses technologies including:
BIM-based automatic path planning
Laser SLAM indoor navigation
Automatic obstacle avoidance
Intelligent monitoring
Dual-battery power management
Its ability to perform both putty and paint coating makes it suitable for projects seeking to connect several wall-finishing processes within one automated construction system.
After putty application and drying, the wall surface must be ground before final coating.
BrightMaster's Putty Grinding Robot automates grinding work on interior walls and ceilings.
The robot provides:
Intelligent constant-force grinding
Automatic navigation
Automatic path planning
Vacuuming and dust collection
Parameterized grinding settings
Remote operation
The current robot specification provides a working height of up to 3.2 m, positioning accuracy of ±2 cm and a 100 L dust collection box.
At the Hebei Yuzhou project, one Putty Grinding Robot achieved a comprehensive construction efficiency of approximately 45 m²/h.
After surface preparation, the Indoor Coating Robot NP320 supports automated primer and topcoat spraying.
The robot can spray interior:
Walls
Ceilings
Bay windows
Beams
Gypsum lines
Other architectural surfaces
NP320 supports automatic path planning, spraying parameter control and remote monitoring. Its current published maximum spraying efficiency is 180 m²/h, depending on operating conditions.
During the Hebei Yuzhou project, one machine achieved a comprehensive single-pass indoor painting efficiency of approximately 135 m²/h.
One of the most valuable aspects of this project was that automation extended beyond the construction robots themselves.
Supporting systems were used to monitor and manage material supply.
The system can respond to operating information such as:
Material shortages
Replenishment requirements
Robot arrival at replenishment points
Remaining material levels
Based on this information, materials can be prepared and supplied to the robots automatically.
This reduces the need for workers to continuously stop machines and manually refill coating materials.
For large interior decoration projects, automatic material supply helps connect individual robots into a more continuous construction process.
The Hebei Yuzhou project provides measurable productivity data for several interior finishing processes.
| Construction Process | Equipment | Comprehensive Efficiency |
|---|---|---|
| Single-Pass Putty Application | 1 Robot | 60 m²/h |
| Putty Grinding | 1 Robot | 45 m²/h |
| Single-Pass Indoor Painting | 1 Robot | 135 m²/h |
These are project-level comprehensive efficiency figures rather than theoretical equipment maximums.
This distinction is important for contractors evaluating construction robots because actual project productivity is influenced by:
Room layout
Surface structure
Material preparation
Robot movement
Process transitions
Construction organization
Site conditions
Real project data therefore provides a more useful reference than equipment speed alone.
Industrial and prefabricated building projects often provide good conditions for robotic construction.
The greater the wall and ceiling area, the more opportunities there are to gain value from repeatable automated processes.
Similar rooms and wall structures make it easier to reuse planned construction paths.
Repeated processes such as putty coating, grinding and painting can be parameterized.
Large-area grinding and painting traditionally require significant manual labor.
Automated equipment can help maintain more predictable productivity across large work areas.
| Indicator | Result |
|---|---|
| Putty Application Efficiency | 60 m²/h |
| Putty Grinding Efficiency | 45 m²/h |
| Indoor Painting Efficiency | 135 m²/h |
| Overall Construction Cost | Reduced by Approx. 16% |
| Construction Quality | Passed Comprehensive Acceptance |
| Automation | Multi-Robot + Automatic Material Feeding |
The project demonstrates how construction automation can be expanded from a single robot into a coordinated robotic interior finishing system.
Before designing an automated interior finishing workflow, contractors should evaluate:
Total wall and ceiling area
Building type
Floor plan
Ceiling height
Wall structure
Putty process
Paint type
Required finish quality
Existing workforce
Construction schedule
Material supply method
Required daily productivity
BrightMaster can then evaluate whether a single robot or multi-robot combination is more appropriate.
The Hebei Yuzhou project demonstrates how Interior Decoration Robots can work together across putty coating, grinding, indoor painting and material supply.
For contractors managing industrial buildings, residential developments, apartments, hotels, offices or other large-scale interior finishing projects, BrightMaster can configure an automated construction workflow according to the actual process and project area.