Which Rv Reducer Is Better?
Compared with the traditional harmonic drive reducer, the RV reducer has high fatigue strength, strong rigidity, long life, and stable return accuracy. Unlike the harmonic drive, the motion accuracy will be significantly reduced as the use time increases, so the world In many countries, RV reducers are mostly used for high-precision robot transmission. For now, RV reducer has a trend of gradually replacing harmonic reducer in advanced robot transmission.
Today, let’s take a look at those foreign giants that manufacture RV reducers, and see what technical strength and widely concerned RV reducer brands are there?
1. Nabtesco, Japan: the world’s reducer giant
Nabtesco was established in September 2003. In fact, it was formed by a strong merger of two Japanese companies, Teijin Seiki and Nabock. As the world’s largest company in the field of precision reducers for industrial robot joints, Nabtesco accounts for 60% of the global market.
Teijin Seiki was established in 1944. Around 1980, Teijin Seiki put forward the RV transmission theory and began to apply it in the robotics industry. In 1986, Teijin Seiki’s RV reducer was officially mass-produced and succeeded. Nabok is a company that produced Japanese automatic doors in 1956.
As manufacturers of motion control systems and components, these two companies have mastered core technologies in their specific business areas and controlled a high market share. In 2003, Teijin Seiki and Nabco merged to form Nabtesco, which has developed into a leader in the RV reducer industry, occupying more than 60% of the market, especially in medium/heavy-duty robots, and its RV reducer market The share is as high as 90%.
Previously, Nabtesco announced that it would invest a total of 7 billion yen in the main factory in Tsu, Japan and the Chinese factory in Changzhou, Jiangsu Province, China to increase the production of reducers. It is expected to increase production capacity by 20% in 2017 and expand to an annual output of 80%. Million units.
2. Japan’s Sumitomo Heavy Machinery: a well-known company for precision reducers
Sumitomo SUMITOMO of Japan is a construction machinery manufacturer under the Sumitomo Group, one of the world’s top 500 with a history of more than 400 years. After Sumitomo products developed a hydraulic excavator with its own technology in 1967, Sumitomo hydraulic excavators are now active everywhere in the world. Silhouette.
Sumitomo of Japan began to produce cycloid reducer products in 1939 and entered the field of industrial robot reducers in 1982. At present, the main products include F4C-D, F4C-UA, F4C-C and many other series of main products. Provide comprehensive reducer product solutions for welding, handling, spraying, assembly and other robot applications.
In 1994, Sumitomo invested and built a factory in Tianjin and established Sumitomo Heavy Machinery Reducer (China) Co., Ltd.; in 2002, it formally established a Shanghai branch and became a sales center in mainland China. At the same time, it established Songjiang assembly center and after-sales service center. In the following years, 33 offices were established; in 2008, Tangshan, Hebei, invested in the construction of a large production base in China; in 2015, precision reducers for industrial robots were produced at the Songjiang plant in Shanghai.
In April 2017, Sumitomo Heavy Industries announced the acquisition of Persimmon Technologies, a 3D printing developer in Wakefield, Massachusetts, for US$33 million. After the completion of the acquisition, Sumitomo Heavy Industries will obtain the latter’s vacuum robots and the next-generation “hybrid field” motor technology, which will help the business development of industrial robot gear reducers and plastic extruders.
On August 1, 2017, Sumitomo Reducer officially released the lighter and energy-saving BBB-H series right-angle shaft gear reducer for the Chinese market. The BBB-H reducer is mainly used in the logistics industry in the application of stacker crane walking, lifting mechanism driving and conveying. At present, this reducer was also displayed in CeMAT ASIA 2017.
3. Slovakia: manufacturer of high-precision bearing reducer
Slovakia Spinea is committed to the research and development, production and sales of high-precision bearing reducers. It ranks No. 4 among the largest bearing reducer manufacturers in the world, and is the earliest high-precision reducer manufacturer in Europe. The product claims to be the only reducer in the world that has a cycloid structure with harmonic dimensions.
Spinea was established in 1994 and mass production began in 1999. For more than 20 years, Spinea first developed the TwinSpin series of high-precision reducers, and then gradually expanded the DriveSpin (drive series) and RotoSpin (positioning drive mechanism) series products based on this, forming a parallel pattern of three types of products.
The TwinSpin series high-precision reducer has the characteristics of high reduction ratio, high precision, high rigidity, high torque, low noise, low vibration and zero backlash. Due to its small size and light weight, it can be used in various joints of the robot. The zero backlash characteristic of this series of products obviously has a leading advantage. In addition, Spinea is manufactured using a unique transmission principle, and its shaft-radial bearing structure has been patented.
In addition to being widely used in automation and industrial robots, Spinea products are also used in various fields such as medical machinery, navigation, and photography. The products are mainly supplied to major European robot companies (such as ABB, KUKA, COMAU, etc.). In Europe and South Korea, there are a large number of small dental machine tools using TwinSpin reducers, which are directly used for denture grinding and restoration in dental clinics.
Spinea high-precision reducer entered China relatively late, but its distinctive technical characteristics have attracted widespread attention in the industry. With the increasing application of Spinea products on machine tools that are mainly used for electric spindles, tool changers, rotary tables and other occasions, as well as the adjustment of product structure, China will also use Spinea products on machine tools more.
4. SEJIN: South Korea’s RV reducer company
The high-precision planetary reducer produced by South Korea’s SEJIN has high precision, large output, low noise and long life, and can be applied to various types of machinery and equipment with extremely high precision requirements.
In 2006, SERVODYMAMICS of Singapore and SEJINIGB of South Korea jointly invested in the establishment of Suzhou Saijin Precision Equipment Co., Ltd., which mainly develops, produces and sells high-precision cycloid gearboxes, planetary gearboxes, right-angle integrated gearboxes and roller rack linear motion products. And so on, products are widely used in precision machine tools, industrial manipulators, robots, wind power, radar and military industries and fields.
SEJIN’s flat high-precision reducer SR series has multiple excellent functions, including good bending rigidity, which is 10 times the rated output torque; the new TTS tooth profile improves the tooth surface contact rate; the speed ratio range is as wide as 30~ 300; strong impact resistance, 500% of the rated output torque; high accuracy, transmission backlash is less than 1 minute, reducing vibration during high-speed operation.
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