The level of manufacturing and application of industrial robots represents the manufacturing prowess of a nation. Therefore, it is imperative to recognize the strategic importance of developing the China robot industry from a national perspective. This development is a crucial means and pathway for China’s transformation from a large manufacturing country to a manufacturing powerhouse.
Since the creation of the first industrial robot in the early 1960s, robotics has demonstrated remarkable vitality. The Japanese government implemented proactive policies to foster its industrial robot industry and application,率先 introducing the technology from the United States. Within just over a decade, Japan achieved the industrialization and widespread adoption of industrial robots. Today, in industrially advanced nations, industrial robots are extensively utilized across numerous sectors including automotive and auto parts manufacturing, mechanical processing, electronics and electrical industries, rubber and plastics, food processing, and logistics. As an indispensable and advanced piece of equipment in modern manufacturing, the industrial robot has become a significant indicator of a country’s manufacturing and technological sophistication.
Globally, industrial robot technology has matured, evolving into a standard piece of equipment widely adopted by industry. This has led to the emergence of several influential and renowned industrial robot corporations, such as Sweden’s ABB, Japan’s FANUC and YASKAWA, Germany’s KUKA, and Italy’s COMAU. These companies have become pillar enterprises in their respective countries.
Research on industrial robots in China began in the 1970s. However, development was relatively slow and the level of research and application remained low due to constraints of the economic system at that time. By 1985, as industrialized nations began to extensively apply and popularize industrial robots, China included industrial robots in its national development plan, initiating research on key models such as spot welding, arc welding, painting, and material handling robots. Entering the 1990s, to align high-tech development with the national economic front, the national high-tech research and development program emphasized both special-purpose and industrial robots, using application projects to drive fundamental research and technological breakthroughs. Through dedicated efforts, a series of industrial robot products were developed. By the late 1990s, several robot industrialization bases and research centers were established in China, laying the groundwork for the development of the domestic robot industry. Presently, China is capable of producing a range of products including SCARA robots, cartesian robots, arc welding robots, spot welding robots, palletizing robots, and Automated Guided Vehicles (AGVs), with some models achieving small-batch production. Several enterprises, driven by market demand, are engaging in the industrialization of robots either independently or through collaboration with research institutes.
Nevertheless, China currently lacks large-scale industrial robot manufacturers comparable to Japan’s FANUC or Germany’s KUKA. The China robot industry is still in its nascent stage. With the advancement of China’s modern manufacturing sector, the demand for industrial robots is growing rapidly. As the most typical mechatronic digital equipment, industrial robots possess high technological value-added and broad application scope. Serving as a supporting technology for advanced manufacturing and an emerging industry in the information society, they will play an increasingly vital role in future production and social development. Global market experts predict that the robotics industry will emerge as a new large-scale high-tech industry following the automobile and computer industries. The continuous enhancement of automation levels in Chinese industrial enterprises is expanding the market for industrial robots, presenting immense opportunities for developers and manufacturers. However, opportunity also implies challenge. Currently, major global industrial robot suppliers are vigorously exploring the Chinese market. Consequently, China must vigorously develop its robotics industry, leverage its manufacturing advantages, enhance independent innovation capabilities, seek distinctive development paths, and, with support from national policies, foster and encourage the growth of a robust domestic China robot industry.
Market Demand and Prospects for Industrial Robots
China is currently transitioning from labor-intensive to modern manufacturing. Revitalizing manufacturing and achieving industrialization are critical tasks for its economic development. Throughout the evolution of manufacturing, production methods inevitably undergo transformations from mechanization and automation to intelligence and informatization. With rapid national economic growth, continuous technological progress, and rising labor costs, the imperatives to further enhance productivity, improve product quality, reduce labor intensity, and ameliorate working conditions have become pressing considerations for many enterprises. As indispensable equipment in advanced manufacturing, the application and proliferation of industrial robots naturally become an ideal choice. The emergence of robotic workstations, particularly automated robotic production lines, not only significantly strengthens enterprise competitiveness but also delivers substantial benefits to users. As the level of enterprise automation continues to rise, the market for robotic automation lines is poised for significant expansion, gradually becoming the predominant form of automated production.
Currently, the global installed base of industrial robots exceeds one million units, primarily concentrated in the manufacturing sectors of technologically advanced nations like Japan, the United States, and Germany. While over 30,000 industrial robots are operational in China, a considerable gap remains compared to industrialized nations. The automotive industry is a major consumer of industrial robots. Examining the number of robots per 10,000 production workers in automotive manufacturing reveals stark disparities: Japan (1710), Italy (1600), France (1120), USA (770), compared to less than 90 in China. This indicates that the China robot market in the automotive sector is far from saturated. Considering the needs of China’s entire manufacturing sector, the potential market for industrial robots is immense.
For a long time, China’s vast population, inexpensive labor, and relatively backward production technology limited the application of industrial robots. Following reform and opening-up, with the emergence of numerous foreign-funded and joint-venture enterprises and the continuous improvement of domestic technological capabilities—particularly the rapid development of the automotive sector—the landscape for industrial robot application in China has changed significantly. Statistics indicate that during a key national five-year plan period, the demand for industrial robots in China grew at an average annual rate exceeding 30%. By 2005, the installed base reached approximately 7,000 units. In recent years, with rapid economic growth, especially the high-speed development of the automotive industry, the annual new installations and total stock of industrial robots in China have been growing swiftly. The widespread adoption of industrial robots can effectively improve product quality and is of great significance for ensuring personal safety, improving the working environment, reducing labor intensity, increasing productivity, saving material consumption, and lowering production costs.
The characteristics of the China robot market can be summarized as follows:
- The rapid development of the domestic automotive industry has significantly propelled the growth of the industrial robot market.
- Coastal economically developed regions constitute the primary market for industrial robots.
- Wholly foreign-owned enterprises and Sino-foreign joint ventures are currently the main users of industrial robots.
- Some modern domestic enterprises are increasingly applying industrial robots.
- Continuously rising labor costs are driving the adoption of industrial robots by enterprises.
- Foreign robot companies are closely targeting the China robot market.
Currently, imported industrial robots in China mainly come from Japan and Europe. As China shifts from labor-intensive to modern manufacturing, despite having reached a certain scale in its installed robot base, a significant gap persists compared to industrialized nations. Facing such a vast potential market, developing the China robot industry holds broad prospects.
Industrial Robot Systems and Products
Industrial robots can be categorized by application field. From the perspective of commonly used series and market share, spot welding, arc welding, assembly, material handling, and painting are the main varieties. As part of the future development strategy for the China robot industry, focus should be placed on these types to drive the overall advancement and industrial growth of industrial robot technology.
1. Spot Welding Robots
Industrial robots used for spot welding operations. The system typically consists of the robot manipulator, a computer control system, a teach pendant, and the spot welding package. The common drive method is AC servo motors, offering advantages such as easy maintenance, low energy consumption, high speed and precision, and safety. With the development of the automotive industry, welding production lines demand integrated weld guns with increasing weight. The 165kg payload spot welding robot is currently the most commonly used model in automotive welding. In 2008, a research institute successfully developed China’s first 165kg spot welding robot, which was applied in an automotive welding workshop. Its performance indicators have reached the level of similar foreign robots.
2. Arc Welding Robots
Industrial robots capable of performing automatic arc welding. A generic arc welding robot system includes a teach pendant, control panel, robot manipulator, automatic wire feeder, and welding power source. It can achieve continuous path control and point-to-point control under computer control, utilizing linear and circular interpolation functions to weld spatial seams. There are two main types: Metal Inert Gas (MIG) and Tungsten Inert Gas (TIG). They are characterized by the ability to perform welding tasks over long periods, ensuring high productivity, quality, and stability. With technological advancement, arc welding robots are evolving towards intelligence. The integration of laser sensors for real-time seam tracking and visual sensors for offline programming enhances the robot’s flexibility and adaptability for welding complex workpieces, ensuring optimal welding quality under various conditions. Domestic companies have developed and begun small-batch production of arc welding robots, with welding quality reaching the level of foreign products.
3. Material Handling Robots
Industrial robots capable of performing automated handling operations. By installing different end-effectors, they can handle workpieces of various shapes and states, greatly alleviating heavy physical labor. Currently, over 100,000 handling robots are used worldwide, extensively applied in machine tool loading/unloading, stamping press automation lines, automatic assembly lines, palletizing, and container handling. The maximum payload can reach 500kg. Domestic companies have developed handling robots with payloads of 100kg and have achieved batch production of cartesian coordinate material pick-and-place manipulators.
4. Painting Robots
Industrial robots used for automatic painting or spraying other coatings. Several models of painting robots were developed and put into use in China earlier, achieving good economic results. However, as quality requirements have increased in recent years, painting robots are often integrated as unit equipment within complete spraying lines. The market for automotive body painting lines is largely occupied by foreign robot products.
5. Automated Guided Vehicle (AGV) Robots
Assembly-type AGVs are primarily used in automotive production lines for the dynamic automated assembly of components like engines, rear axles, and fuel tanks, significantly improving production efficiency. Handling-type AGVs are widely used in machinery, electronics, textiles, papermaking, cigarette, and food industries. A domestic company designs and manufactures AGVs, possessing unique independent intellectual property rights in this field in China. Its product series includes omnidirectional transport AGVs, omnidirectional dual-lift assembly AGVs, forklift-type AGVs, and Laser Guided Vehicles (LGVs). Key features include mobility (not fixedly occupying floor space), high flexibility (easy path modification), high system reliability, and easy integration with management systems via TCP/IP protocol, making them the optimal choice for building unmanned workshops, automated warehouses, and logistics automation.
Existing Technological Foundation and Challenges
1. Established Technological Foundation
Through organized and planned development of the industrial robot industry starting from national research initiatives, China has made significant progress in technological攻关 and design level over more than a decade of R&D, production, and application. Currently, for certain types such as arc welding, spot welding, painting, material handling, assembly, and special robots, China has essentially mastered the design and manufacturing technology of robot manipulators, solved key technologies for control and drive systems, and mastered全线 automatic communication and coordinated control technology for complete automation lines. In terms of basic components, breakthroughs have been made in harmonic reducers, robotic welding power sources, and seam tracking devices. Specific aspects include:
- Theoretical Research: Fundamental research on robot kinematics, dynamics, configuration, motion control algorithms, programming languages, internal/external sensors, multi-sensor control systems, offline programming, and self-diagnosis/safety protection technologies. China has essentially mastered all key technologies for industrial robots.
- Key Component Development: Development of AC/DC servo motors and drive systems, tachogenerators, photoelectric encoders, hydraulic/pneumatic components, ball screws, linear motion guides, harmonic drives, RV reducers, and crossed roller bearings. A number of competent specialized manufacturers have emerged.
- Robot System Design Technology: Development of robot control devices with dual-CPU, multi-CPU, and hierarchical control structures; modular robot controllers; and the ability to design and produce various types of robot manipulators with independent intellectual property rights.
2. Challenges in Industrialization
Despite the foundation, several challenges hinder the full-scale industrialization of the China robot industry:
| Challenge Area | Description |
|---|---|
| Weak Foundational Component Manufacturing | There is a significant gap in the quality, product series, and batch supply capability of core components compared to foreign products, particularly in high-performance AC servo motors and high-precision reducers. Reliance on imports for these components affects the price competitiveness of domestically produced robots. |
| Lack of Established Domestic Brands | While several companies are engaged in industrial robot technology development, none have achieved large scale or significant market brand recognition. The market faces intense competition from established foreign brands, which often employ strategies of low initial machine prices followed by high maintenance and spare parts costs. |
| Insufficient Policy Incentives | Compared to historical examples like Japan, which implemented supportive policies to foster its robot industry, China currently has limited specific policies encouraging the R&D and adoption of domestic industrial robot products. |
3. Key Technologies Requiring Research
To achieve industrialization, the China robot industry needs to advance research in several key technological areas:
- Optimal design technology for robot manipulators.
- Next-generation intelligent robot controller technology.
- Manufacturing technology for key robot components and units.
- Robot offline programming and simulation technology.
- Robot motion control based on external sensor technology.
- Industrial robot industrialized manufacturing technology.
- Remote fault diagnosis and repair technology for industrial robots.
- Coordinated operation technology for industrial robots and complete equipment sets.
- Optimal design technology for complex mechatronic systems and analysis of their impact on system performance.
- Dynamic modeling, model simplification, identification, and control methods for robot mechanisms with flexibility, high acceleration, and large payloads.
Many of these areas involve advanced modeling and control. For instance, the dynamics of a flexible joint robot can be represented more accurately than with a simple rigid model. A common simplified model for control design is:
$$ \tau = M(q)\ddot{q} + C(q, \dot{q})\dot{q} + G(q) + K(q – \theta) + D(\dot{q} – \dot{\theta}) $$
$$ J\ddot{\theta} + K(\theta – q) + D(\dot{\theta} – \dot{q}) = u $$
Where $q$ is the link position, $\theta$ is the motor position, $M$ is the inertia matrix, $C$ represents Coriolis and centrifugal forces, $G$ is gravity, $K$ and $D$ are joint stiffness and damping matrices, $J$ is the motor inertia matrix, $\tau$ is the link torque, and $u$ is the motor torque. Developing advanced controllers for such models is crucial for high-performance China robot applications.
Development Strategies and Recommendations for the China Robot Industry
Based on the analysis of the market, technological status, and challenges, the following strategic pathways and recommendations are proposed to accelerate the development and industrialization of the China robot industry:
| Strategic Focus | Key Actions | Expected Outcome |
|---|---|---|
| Market-Driven Product Development | Concentrate technical and financial resources on achieving breakthroughs in 2-3 key robot products (e.g., automotive spot/arc welding robots) with high market demand. Focus on achieving规模化 application and overall technological breakthrough. | Establish competitive niche capabilities, stimulate domestic component supply chains, and lay the foundation for broader industrialization. |
| National-Level Special Projects | Establish national专项 programs to develop the domestic China robot industry, promoting the use of domestic robots within national industrial chains. Programs must include breakthroughs in key components like motor drives, high-precision reducers, and dedicated multi-axis controllers. Prioritize complete line成套 equipment technology involving multiple robots. | Reduce dependency on foreign monopolies, lower system costs through domestic components, and guide large-scale adoption in key sectors like automotive through integrated solutions. |
| Enterprise-Led Industry-Academia-Research Alliances | Select enterprises with clear development goals, target applications, market demand, and initial investment capacity as focal points for support. Leverage existing strong research institutes’ technical积累. Establish合理的 management and incentive mechanisms for technology development, production, and sales under an enterprise model, aiming to form enterprise groups integrating R&D, production, and service. | Create powerful, market-responsive entities capable of sustained R&D, scaled production, and competitive sales and support services for the China robot. |
| Comprehensive Policy Support | Implement long-term national strategic plans for robotics. Provide preferential policies in funding, taxation, and sales subsidies for domestic companies. Enact policies encouraging enterprises to adopt domestic robots (e.g., financial subsidies per robot purchased). Adjust tariffs: increase import duties on complete robots, decrease duties on key components like servo motors and reducers. For hazardous operations (painting, casting, toxic environments), consider regulations mandating the use of industrial robots to protect workers. | Level the playing field against foreign competitors, incentivize production and adoption of domestic China robot products, ensure worker safety, and create stable, predictable demand. |
The effectiveness of control strategies in realizing high-performance robots can be evaluated using quantitative metrics. The following table summarizes key performance indicators (KPIs) for a China robot control system:
| Performance Indicator | Formula / Description | Target for High-Performance China Robot |
|---|---|---|
| Positioning Accuracy | $A_p = \max | x_{cmd} – x_{actual} |$ over repeated cycles to a fixed point. | $A_p < 0.1 mm$ for precision assembly. |
| Path Accuracy | Maximum deviation from the programmed path during motion, $E_{path} = \max( \text{distance}( \text{actual trajectory}, \text{desired trajectory} ) )$. | $E_{path} < 0.5 mm$ for welding/cutting. |
| Repeatability | $R = \bar{x} \pm 3\sigma$, where $\bar{x}$ is mean position and $\sigma$ is standard deviation. | $ \pm 3\sigma < 0.05 mm $. |
| Settling Time | Time $t_s$ required for the position error to enter and remain within a specified band (e.g., $\pm 2\%$ of final value) after a step command. | $t_s < 0.5s$ for high-speed operations. |
| Overshoot | Maximum percentage by which the output exceeds its final steady-state value after a step input, $M_p = \frac{ y_{max} – y_{final} }{ y_{final} } \times 100\%$. | $M_p < 5\%$ for smooth operation. |
Optimizing a China robot’s dynamic performance often involves solving a multi-objective optimization problem. A simplified formulation for motion profile optimization to minimize time and jerk might be:
$$ \min_{u(t)} \left( \alpha T + \beta \int_0^T \dddot{x}^2 , dt \right) $$
subject to:
$$ \dot{x}(t) = v(t), \quad \dot{v}(t) = a(t), \quad \dot{a}(t) = j(t) = u(t) $$
$$ |v(t)| \leq v_{max}, \quad |a(t)| \leq a_{max}, \quad |j(t)| \leq j_{max} $$
$$ x(0)=x_0, v(0)=0, a(0)=0; \quad x(T)=x_f, v(T)=0, a(T)=0 $$
Where $T$ is the total motion time, $j$ is jerk, and $\alpha, \beta$ are weighting factors balancing speed and smoothness. Solving such problems is key to achieving efficient and stable motion for China robot systems.
Conclusion
Currently, China’s national economy is developing rapidly, and its advanced manufacturing sector has entered a new stage of development. With the acceleration of economic globalization, Chinese manufacturing faces the challenge of integrating with international standards and participating in global competition. How to adapt to rapidly changing domestic and international market demands, and how to survive and develop in the market through high quality, low cost, and rapid response, are unavoidable questions for Chinese enterprises. These questions provide substantial market demand for the application of industrial robots, propelling the China robot application market towards maturity. The manufacturing and application level of industrial robots represents a nation’s manufacturing level. Therefore, it is recommended that the importance of developing the China robot industry be recognized from a national strategic height, as it is a vital means and pathway for China’s transformation from a large manufacturing country to a manufacturing powerhouse. The development of the China robot industry stands at a critical inflection point. If governmental support measures are advanced further, the China robot industry is likely to surpass the current “critical period,” ascend to a new level, and enter a stage of rapid development.