Guide: The reducer is a key component of the robot, and the cost accounts for one-third of the production cost of the entire robot. China has a late research on robot reducer and its technology is immature. At present, it relies heavily on imports. The reducer is the key factor restricting the development of China's robot industry. It is an inevitable choice for the domestic robot enterprise to industrialize.
The robot reducer classifies the robot reducer, which can be divided into five categories according to the structure:Harmonic gear reducer, cycloidal pinion planetary reducer, RV reducer, precision planetary reducer and filter gear reducer. They differ in terms of accuracy, torque, stiffness, transmission efficiency, etc., which measure the performance of the reducer. Among them, RV reducer and harmonic reducer are the most mainstream precision reducers for industrial robots.
RV reducers have a tendency to gradually replace harmonic reducers in advanced robotic drives. 75% of the world's precision reducer market is occupied by Japan's HarmonicaDrive and Nabtesco, of which Nabtesco produces RV reducers, accounting for about 60% of the total, HamonicaDrive produces harmonic reducers, accounting for about 15%.
Robot reducer market sizeThe number of robots in service in China has accounted for about 9% of the global total. In 2015, the number of industrial robots in the Chinese market reached 7,500, a year-on-year increase of 36.6%. Overall, the demand for the robot market has only increased. Under the temptation of various factors, the development speed of the industrial robot industry will once again accelerate, and enter the second booming development period in history, or it will be more fierce than the first wave.
With the rapid development of China's industrial robot application market, the market demand for industrial robots for speed reducers has also increased. In general, the number of reducers required for an industrial robot is 4-6. In 2015, the market size of China's industrial robot reducer was about 1.15 billion yuan. With the development of industrial robots in the future, CIC Consulting Industry Research Center predicts that the scale of China's industrial robot reducer market will exceed 4 billion yuan by 2020. The growth rate is about 30%.
Robots will become more and more popular around the world. It is estimated that by 2020, the annual sales revenue of service robots is expected to exceed 30 billion yuan. Industrial robots, together with service robots that are increasingly entering people's lives, are very promising for the reducer industry.
Current status of domestically used reducerAt present, the situation of Chinese robots is still very serious. The most typical one is the lack of overall breakthrough in the core technology of robots. The core components are mainly divided into three parts, a robot reducer, an AC/DC servo motor and a controller. From the cost point of view, the current cost structure of the global robot industry, about 35% is the reducer, about 20% is the servo motor, about 15% is the control system, the machined body may only account for about 15%, the other part is mainly the application . It can be seen that the reducer is a key factor restricting the development of the robot industry, and the core technology of the reducer is almost monopolized in the hands of two Japanese companies Nabtesco and Harmonicdrive. Robot companies are working for Japanese companies.
The high proportion of key components imported has led to higher cost of domestic manufacturing robots. In particular, the speed reducer, the price of the domestic company to buy the reducer is nearly five times the price of foreign companies. In this way, it is difficult for domestically produced robots to form a price advantage. Only when the annual output is 500-1000 units, there is a certain scale effect. Therefore, if China wants to form a robot industrialization, get rid of the constraints of foreign robot companies, and win autonomy in the field of robotics, it must accelerate the localization of the reducer.
RV reducers can only be produced in very few countries in the world. In recent years, although there are mass-produced RV reducers in China, the product performance indicators can meet the requirements in the short term, but due to quality control and process problems, it is easy to wear and scrap. Therefore, few domestic robot companies choose, and the speed reducers in the Chinese market generally rely on imports.
In fact, during the "Twelfth Five-Year Plan" period, the national "863" plan included it as a technical bottleneck to be focused on. The top universities and research institutions in China have only had papers for several years, and there are no real objects. In the past two years, with the development of industrial robots, some enterprises have begun to invest in research and development of domestic RV reducers, and most of them are currently in the stage of technology research and development.
The technical difficulty of the RV reducer is that the component needs to ensure a large torque transmission, withstand a large overload shock, and to ensure the expected working life. Therefore, the over-positioning structure is used in the design, which makes the machining precision of the workpiece extremely high. Processing is very difficult, and the important constraints of robotic scale production are processing equipment and processing technology.
The domestic RV reducer has a small gap with foreign products in terms of rated torque and transmission efficiency, but the gap between the stability and accuracy of torsional stiffness and transmission accuracy is still obvious. Due to the difference in material and process level, the gap in fatigue strength Also more obvious.
It is expected that the main development direction of domestic reducers in the future will be technological breakthroughs and improvements. In the market, the company will enter the low-end industrial robot market first, and gradually enter the high-end products such as welding robots in automobile production lines after 2016. The localization of the reducer will greatly reduce the cost of domestic industrial robots.
What is a Capsule Slip Ring?
Capsule slip rings are a type of electrical connector that are used to transfer power and data between two rotating objects. They are commonly used in applications where there is a need to send or receive signals from a stationary object to a rotating one, or vice versa.
How Does it Work?
Capsule slip rings work by using a series of electrical contacts that rotate with the object on which they are mounted. These contacts are spaced evenly around the circumference of the ring, and as they rotate they make and break contact with corresponding contacts on the other object. This allows power and data to be transferred between the two objects without any interruption.
Advantages of Capsule Slip Rings
There are several advantages to using capsule slip rings in place of other types of electrical connectors.
For example, the rotation of the contacts causes them to be freely accessible and therefore free from dust and debris. This makes them ideal for applications where connector maintenance is often a problem.
Because the contacts are freely accessible, they can be readily replaced if a fault occurs. They also have very low electrical resistance, making them ideal for transmitting radio frequency signals. Because of the low resistance, this type of connector is often used in high-speed data transmissions.
This type of Conductive Slip Ring is similar to the shape of a hat. The brim part is a flange with a conductive slip ring. The function of the flange is to facilitate installation. It is connected to electrical equipment through the fixing hole of the flange. It can be firmly installed on the equipment. Therefore, the stator of the cap-type slip ring is generally fixed by the outer layer with a flange, and the inner part is the rotor with the inner shaft rotating. The stator and the rotor are not fixed, and the details will be different according to the installation method.
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