Research status and future of industrial robot harmonic reducer and its supporting bearings

In recent years, China's industrial robotics industry has entered a new period of historical opportunities. International robot companies represented by ABB, KUKA, Yaskawa, and Fanuc have entered China in large numbers and set up factories to seize market share. In China, such as mobile phone manufacturing, semiconductors, liquid crystal production machinery and other industries, the demand for small robots is also growing. However, for domestic industrial robots, especially harmonic reducers, servo motors, control systems, etc. Heavy dependence on imports has led to a gap between its competitiveness and foreign companies, but these are also the upstream components and key components of industrial robots. According to the statistics of the International Robot Federation (IFR), in 2012, China imported a total of about 22,000 industrial robots, and China will be the fastest growing industrial robot market in the world. HDSI's harmonic reducer is an irreplaceable component for small industrial robots (below 20kg) or articulated arms, which brings new opportunities for expanding the Chinese mainland market. In January 2011, HDSI established in China to establish Hamernaco (Shanghai) Trading Co., Ltd., which is a wholly-owned sales subsidiary established in China for its investment in China. It is mainly responsible for technical support and after-sales services such as sales and selection of HDSI products in mainland China.

The harmonic reducer consists of only 3 basic components: the flexspline, the wave generator and the rigid wheel. The outer diameter of the flexspline is slightly smaller than the inner diameter of the rigid wheel, and usually the flexo wheel has 2 teeth less than the rigid wheel. The elliptical shape of the wave generator determines that the contact points of the teeth of the flexspline and the rigid wheel are distributed on two opposite sides of the center of the ellipse. During the rotation of the wave generator, the contact portion of the flex spline and the just-toothed tooth start to mesh. When the wave generator rotates by 180° every clockwise, the flexspline is equivalent to the one-tooth number difference of the counterclockwise rotation of the rigid wheel. In two places with 180° symmetry, more than 30% of all teeth are meshed at the same time, which also results in high torque transmission.

HarmonicDrive has a high-torque CSG series harmonic speed reducer, a standard CSF series harmonic speed reducer, an ultra-flat and high-load capacity CSD series harmonic speed reducer, a high-torque hollow shaft, and an input shaft type SHG series harmonic speed reduction , Hollow shafts and input shaft type SHF series harmonic speed reducers, Super flat and hollow SHD series harmonic speed reducers, Small biaxial type CSF supermini series harmonic speed reducers, Standard type CSG-GH/CSF-GH harmonic speed reduction Series.

Domestic harmonic reducer bearings still have great advantages compared with similar imported harmonic reducer bearings. With the improvement of production technology of harmonic reducer bearings in China, the quality of domestic harmonic reducer bearings is more secure, and There are also advantages in terms of prices and strong competitiveness in the domestic market. The localization of harmonic reducer bearings has changed the market situation of these high-precision precision bearing products that have long been monopolized by foreign companies and urgently needed in the domestic market. With the establishment of a number of domestic brand enterprises, the competitiveness of China's harmonic reducer bearings in the international market is also increasingly strong, more and more open domestic and foreign markets.