1. Introduction: Innovation and Its Relevance for Manufacturing
Maintenance, Repair and Operation (MRO) is a critical vector for industrial efficiency. In the Industry 4.0 panorama, human-robot collaboration, using cobots (collaborative robots), represents a strategic advance. Cobots enhance the capabilities of the human operator, not replace them. For the Brazilian industrial market, the adoption of cobots in MRO optimizes processes.
These systems automate repetitive, dangerous or ergonomically demanding tasks, freeing up qualified technicians for complex activities. This increases worker safety, ensuring compliance with NR-12 (Occupational Safety in Machines and Equipment) and optimizing maintenance cycles. UNITEC-D GmbH, a key supplier in the supply chain, highlights the precision and durability of MRO components, vital for cobotic operations.
2. Scientific Foundations: The Physics of Collaboration
The concept of cobots is based on safe and intuitive interaction with humans. Unlike traditional industrial robots, which operate in isolated cells, cobots coexist in the same space, often without physical barriers. This is made possible by advanced sensing and control systems.
Perception and Security
Cobots use highly sensitive force-torque sensors, located in the joints and wrists, capable of detecting unexpected contact or excessive forces. Upon detecting contact, the robot can reduce speed, stop or reverse movement. Computer vision systems (2D/3D cameras, LiDAR) monitor the work area to identify human presence and adjust behavior. Compliance with ABNT NBR ISO 10218 and ABNT NBR ISO/TS 15066 is mandatory, defining the four types of collaborative operation:
- Monitored safety stop: The robot stops when it detects an operator's entry and resumes when it detects their exit.
- Manual guidance mode: The operator manually guides the robot through the task.
- Speed control and separation: The robot adjusts its speed based on proximity to the operator.
- Limitation of force and power: The robot intrinsically limits the forces and powers it can exert.
Kinematics and Control
Predictive and adaptive control algorithms enable precise movements in dynamic, unstructured environments common in MRO. Sensory feedback is integrated in real time to adjust trajectories, avoid collisions and ensure correct manipulation of tools and components. This is critical for torques of 15 Nm or bearing insertions with a tolerance of 0.02 mm.
Artificial Intelligence and Machine Learning
Learning by demonstration (PbD) is a pillar. An operator can guide the cobot through a task, and the robot learns the sequence. Neural networks and reinforcement learning refine these actions, allowing adaptation to variations in working conditions. This provides versatility for various MRO activities, from visual inspection of welds to replacement of pneumatic actuators.
3. Current State of Development: TRLs, Prototypes and Key Actors
Cobot technology for MRO has a Technology Readiness Level (TRL) between 4 and 7, depending on the complexity and operational environment.
TRL 4-5 (Validation in a Relevant Environment)
Cobots are used in visual inspection, collection of sensory data (thermography, ultrasound) and assembly/disassembly of easily accessible components. Prototypes validate viability in the laboratory or pilot plants. Manufacturers such as Universal Robots and FANUC offer 6- or 7-axis robotic arms capable of handling up to 20 kg.
TRL 6-7 (Demonstration in Operational Environment)
Advanced applications include tool handling for tightening screws, welding or painting in hard-to-reach areas. Integration with maintenance management systems (CMMS) already occurs, allowing scheduling and automatic data recording. In large factories, cobots replace industrial filters with precision and traceability. A medium-sized cobot has an average cost of R$150,000 to R$300,000, with payback estimated between 1.5 and 3 years.
Large robotics manufacturers (ABB, KUKA, Yaskawa) invest in safe and easy-to-program cobots. Brazilian integrators adapt these technologies to local needs, considering NR-12 and INMETRO certification.
4. Potential Impact on MRO: Transforming Maintenance and Operations
The implementation of cobots profoundly reshapes MRO practices, promoting improvements in safety, efficiency and quality.
Operational Security
Cobots take on tasks in risk areas (high temperatures, high pressures of 200 bar, environments with toxic gases or moving machines). This minimizes human exposure to accidents, contributing to compliance with NR-12.
Accuracy and Consistency
The exact repetition of movements eliminates variations due to human fatigue, ensuring standardization in torques of 50 Nm, visual inspections with a resolution of 0.1 mm or the application of lubricants. The result is an increase in useful life and a reduction in premature failures.
Efficiency and OEE
Speedy execution of repetitive tasks and continuous operation (with quick recharge or battery change cycles) reduce downtime. Studies indicate an increase of 10% to 25% in Overall Equipment Efficiency (OEE) on lines with cobots in maintenance.
Predictive and Prescriptive Maintenance
Equipped with sensors, cobots collect real-time data on the state of machines (vibration, temperature of 80°C in bearings, acoustic anomalies). This data feeds Predictive Maintenance systems. The ability of a cobot to perform small interventions or collect samples for analysis elevates maintenance to a prescriptive level.
Spare Parts Management
Accurate identification and careful handling of sensitive or high-value components are improved. UNITEC-D GmbH, as a supplier of certified spare parts, understands that this technology catalyzes the demand for high-quality components that justify investment in automation. Parts such as precision couplings and industrial seals require traceability and certification, aligning with cobotic performance requirements.
5. Timeline and Adoption Curve: Milestones 2026-2035
The adoption of cobots in MRO in the Brazilian market will be progressive, influenced by economic, technological and regulatory factors.
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2026-2028: Initial Phase and Sector Pilots
Focus: Large industries (automotive, energy, mining) with high demand for MRO and high-risk environments.
Applications: Automated visual inspection of overhead cranes (5 meters high), vibration monitoring in 75 kW electric motors, assistance in replacing light components (up to 5 kg).
Investment: Pilot projects with demonstrable ROI, focused on tasks with a high cost of accidents or downtime.
Compliance: First INMETRO certifications for cobotic systems, complying with ABNT NBR ISO 10218. -
2029-2031: Expansion and Diversification
Focus: Medium-sized industries (food and beverages, pharmaceuticals, consumer goods).
Applications: Automated sample collection (oil, fluids), equipment cleaning, small repairs. Greater integration with CMMS and ERP.
Technology: Robots with greater dexterity and ability to switch tools. Increased battery life (up to 8 continuous hours).
ROI: Improved efficiency by 15% and reduced maintenance costs by 5% to 10% in automated tasks. -
2032-2035: Comprehensive Maturation and Integration
Focus: Diffusion to sectors with lower initial technological intensity, and deepening in all sectors.
Applications: Complex AI diagnostics, autonomous reconfiguration, advanced collaboration on repairs requiring multiple cobots.
Technology: Advanced proximity sensors, intuitive programming interfaces. Complete integration with Digital Twins, allowing maintenance simulations and virtual training.
Impact: Reduced MRO-related accident rate by up to 30% in industries that widely adopt the technology.
6. Challenges and Barriers: Technical, Economic and Regulatory Obstacles
The adoption of cobots in MRO faces challenges that require a strategic approach.
Technical Barriers
- Tool Versatility: The ability to manipulate a wide variety of MRO-specific tools and components (wrenches, multimeters, welding equipment) is still in development. Adaptive grippers and automatic tool changers are essential.
- Perception in Dynamic Environments: Variations in lighting, dust, smoke and movement affect the robustness of cobots' visual and tactile perception systems.
- Integration with Legacy Systems: Many plants operate with old machines without modern interfaces. Integrating cobots into these systems requires customized solutions.
Economic Barriers
- High Initial Cost: The investment in hardware, software and network infrastructure can be considerable. A rigorous cost-benefit analysis, focusing on long-term ROI, is crucial. Pilot projects can cost between R$200,000 and R$500,000.
- Return on Investment (ROI): Quantifying ROI is complex, involving metrics such as reducing accidents, improving maintenance quality and increasing the useful life of equipment, which are not always easily monetizable in the short term.
Regulatory and Certification Barriers
- Normative Compliance: Adherence to Brazilian standards such as NR-12 and INMETRO guidelines. Certification of complex cobotic systems is a rigorous process.
- Legal and Liability Aspects: Legal liability issues in accidents involving cobots and humans are still being defined.
7. What Plant Engineers Should Do Now: Practical Preparation Steps
The transition to cobot-assisted MRO requires a proactive and structured approach. Plant engineers must consider:
- Opportunity Identification: Identify repetitive, dangerous, high-precision MRO tasks or operational bottlenecks. Prioritize those with high ROI (e.g. boiler inspection, valve replacement on 150°C production lines).
- Workforce Education and Training: Qualify technicians in programming, safe operation and supervision of cobots.
- Risk and Safety Assessment: Carry out detailed risk analyzes (according to ABNT NBR ISO 12100) for each application. Ensure compliance with NR-12.
- Partnership with Technology Suppliers: Collaborate with cobot manufacturers and integrators. UNITEC-D GmbH assists in the selection of parts and accessories for robustness and durability, such as industrial sensors and pneumatic/electric actuators.
- Data Infrastructure Development: Ensure that the plant's IT/OT infrastructure is prepared for the collection, storage and analysis of data generated by cobots, which can amount to terabytes annually.
- Start with Pilot Projects: Start with small-scale implementations to validate the technology and demonstrate value.
8. Conclusion: Promise Versus Reality and the Role of UNITEC-D
Human-robot collaboration on MRO tasks represents a frontier of industrial automation with the potential to transform maintenance safety, efficiency and economics. The vision of technicians working side by side with cobots, optimizing processes and minimizing risks, becomes a reality.
Realizing this potential requires a pragmatic approach, overcoming technical challenges, ensuring economic viability via clear ROI and navigating the Brazilian regulatory landscape, with its standards such as NR-10 and NR-12.
UNITEC-D GmbH reaffirms its commitment to supporting the industry in this transition by providing excellent MRO components that underlie reliable and long-lasting cobotic systems. Choosing certified quality parts and equipment is essential for the success of any automation project, guaranteeing performance and longevity of investments.
Discover how UNITEC-D's high-performance MRO components can optimize your operations. Visit the UNITEC-D E-Catalog.
9. References
- ABNT NBR ISO 10218-1:2017 – Robots and robotic devices – Safety requirements for industrial robots – Part 1: Robots.
- ABNT NBR ISO 10218-2:2017 – Robots and robotic devices – Safety requirements for industrial robots – Part 2: Robot systems and integration.
- ABNT NBR ISO/TS 15066:2019 – Robots and robotic devices – Collaborative robots.
- Regulatory Standard NR-12 – Safety at Work in Machines and Equipment. Ministry of Labor and Employment, Brazil.
- Regulatory Standard NR-10 – Safety in Electrical Installations and Services. Ministry of Labor and Employment, Brazil.
- International Federation of Robotics (IFR) – World Robotics Reports (annual).
- IEEE Robotics and Automation Society – Various publications on automation and robotics.
