Industrial robot bearings, to be precise, should be called for industrial robots Bearings, mainly including thin-walled ball bearings, cross cylindrical roller bearings, harmonic wave reducer flexible bearing, etc.
1 Development status of industrial robot bearings
Bearing of industrial robot is the key supporting foundation of industrial robot. One of the components is still a relatively weak link in China. Existing bearings national standards cannot meet and guide the design and production of industrial robot bearings and inspection.One of Luoyang company has been committed to industrial machinery for many years. The research and development of Qiman bearing has now formed a thin-walled bearing with equal cross section cylindrical roller bearing and harmonic reducer flexible bearing, product from inner diameter Φ 15mm to outer diameter Φ 650mm, accuracy from P0 to P2. It can be produced and manufactured, and can fully meet the needs of industrial robot host plants.
In the development and production of industrial robot bearings, the production of robot bearings has been standardized and serialized. Samples of thin-walled bearings with equal cross-section for industrial robots, light cross cylindrical roller bearings, and flexible bearings for harmonic reducers have been prepared, and product technical standards have been formulated. The standards have been verified by experts and filed by the Bureau of Quality and Technical Supervision, filling the gap in China, and are in line with international standards. The company's equal-section thin-walled bearing series products were identified as high-tech products in 2004, and the enterprise was identified as high-tech enterprise.
The company is recognized by the Ministry of Science and Technology as the undertaking unit of the National Torch Program. It was supported by the National Innovative SME Development Fund in.
At present,One of Luoyang company is specialized in industrial machinery research and development of human bearing, accumulated production and sales of various robot shafts in the past ten years. Nearly 200000 sets are sold to Europe, America, Japan, South Korea, Singapore, China and Taiwan, Gulf and other countries and regions, but also for many domestic enterprises engaged in industrial robots and
Enterprises and scientific research institutions engaged in research and development and production of parts and components provide product support and technology support services.
2 Application and suggestions
According to statistics, China has the largest number of people engaged in robot research in the world, and the research time is also very long, but it is ironic that it still has not mastered the core technology of robots. Key basic components of industrial robots, such as drivers, AC/DC servo motors, and precision reducers, still rely on imports, which has become the bottleneck in the development of industrial robots in China. In the face of this situation, some people even questioned whether industrial robots should be developed in China?
For the benefit of the country and the rejuvenation of the nation, we are truly full of confidence and expectation for China's industrial robots.
According to Wang Weiming, deputy director of the Equipment Industry Department of the Ministry of Industry and Information Technology, the Ministry of Industry and Information Technology and the Ministry of Finance are coordinating and considering relevant supporting policies for the development of key components in the field of robots, including drivers, motors and reducers. Qu Daokui, deputy director of the National Robotics Engineering Research Center and chairman of the China Robotics Industry Innovation Alliance, is optimistic about the future of the localization of key components. He believes that as long as there is a market and demand, with the expansion of the host machine manufacturer team, the technology level and product supply of supporting enterprises will keep up with it. I hope these can add positive energy to the revitalization of the industrial robot industry.
In many years of practice, we combine the examples around us, and particularly recommend:
a. Cultivate qualified talent team
In the past five years, in the process of providing supporting and technical services for many domestic industrial robot manufacturers, we feel that some phenomena are universal. For example, the personnel who do the overall design of the robot seem to be not professional enough in how to select and configure bearings, how to select tolerances and fits, how to ensure the accuracy of the host machine, what are the requirements of relevant supporting parts, and how to inspect and assemble. What's more, the design is to imitate the cat and draw the tiger without understanding; Manufacturing is shoddy and careless in inspection and control; The assembled products are only assembled but not matched. There is a certain gap between the assembled products and similar foreign products in terms of accuracy, flexibility, vibration and noise. Some enterprises even bought back foreign robot prototypes for imitation, mapping and reassembly, but became "disabled" and could not work properly. Although not all of the above situations are common.
The reality shows that there is a lack of qualified talents at all key nodes in the field of robotics in China, from design to manufacturing, from main engine to parts. At present, in this field, we need not only qualified designers, but also qualified craftsmen and skilled craftsmen. Therefore, while revitalizing the key parts of robots, it is urgent to create a group of excellent professional talents.
b. Overcome the tendency of heavy main engine and light parts
In the development of domestic equipment manufacturing industry, there has long been a prominent problem of focusing on the main engine and light components. With the improvement of China's main engine level, the bottleneck phenomenon of basic parts falling behind the main engine has become increasingly apparent, so that most of the key basic parts of the 18 major technical equipment key areas supported by the state are dependent on imports and controlled by others. It should be particularly mentioned here that when the country begins to attach importance to the development of basic parts and give relevant policy support, it should not make the old mistake again. For the basic parts of basic parts - bearing and gear industry, the same should be given pay attention. At present, in the field of precision reducers, there are mainly two types of reducers for industrial robots, one is harmonic reducer, and the other is RV cycloidal pinwheel reducer. The basic parts of these two reducers are bearings and gears. High-precision and high reliability also comes from bearings and gears with high accuracy and reliability.
When we revitalize basic components, we should not forget them. Fortunately, many domestic experts and leaders have noticed this point. Many experts pointed out that in the field of key parts and general parts of high-end intelligent manufacturing equipment, we should focus on the development of high-performance, high-precision and reliable bearings, hydraulic/pneumatic/sealing components, gear transmission devices and large precision, complex, long-life molds.
c. Focus on international technology development
At present, in the robot high-precision harmonic reducer, its gear transmission adopts double-arc tooth profile, which can effectively improve the stress condition of the flexible gear tooth root and the transmission meshing quality, improve the bearing capacity, torsional stiffness and fatigue life of the flexible gear, and reduce the minimum transmission ratio. In the early 1990s, this technology has been basically improved. The international market in this field is mainly monopolized by Japanese enterprises, while China has just started.
Compared with the harmonic reducer, the RV reducer has higher rigidity and rotation accuracy. At present, its development direction is how to increase the torsional rigidity and maximum bending moment of the reducer and improve its service life under severe conditions such as frequent acceleration and deceleration through the improvement of the internal bearing configuration, material and heat treatment process. At present, this field is also monopolized by Japanese enterprises in the international market. In short, China's industrial robot industry is booming. Accelerating the revitalization of basic components is of great significance and has a long way to go.
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