Research, development and industrialization of robot bearings in China


During the Seventh Five Year Plan period, Luoyang axis Research Technology Co., Ltd. (Luoyang Bearing Research Institute) (hereinafter referred to as axis research technology) undertook the national development and research of special bearings for robots, and carried out design, trial production, performance inspection and life test of thin-walled four point contact ball bearings and thin-walled cross cylindrical roller bearings for welding, spraying and assembly robots, Compared with the results of similar bearings of German Yao and Japanese THK, it reached the technical level of similar international products at that time, such as German Yao and Japanese THK.

In 1988, Jiyan technology undertook the national project theoretical analysis and calculation of thin-walled flexible bearing of harmonic drive, which analyzed and studied the principle of harmonic drive installation and bearing installation, which provided a theoretical basis for the design of thin-walled flexible bearing.

In 1988, the national project "development of flexible bearing for harmonic drive transmission" undertaken by Luoyang LYC company carried out the design, trial production, performance detection and life test of four-point contactor rotary table bearing for radar of measurement and control system of Shenzhou spacecraft and flexible deep groove ball bearing for harmonic drive reducer, which were successfully applied to Shenzhou 1 and Shenzhou 2 spacecraft developed by China. The research and development of high-precision thin-wall equal cross-section angular contact ball bearings ly-7023, ly-7024 and ly-7025 has been undertaken, and the product technical indicators have reached the same level as kaydon and RBC, the first-class foreign thin-wall equal cross-section manufacturing enterprises.

In 2010, Luoyang LYC company undertook the research and development of thin-walled rotary table bearing for heavy-duty industrial robot, which developed a four point contact ball thin-walled rotary table bearing for waist of heavy-duty welding industrial robot, and passed the user's installation.

In 2004, Jiyan technology undertook the development and research project of key supporting bearings for robots of China Machinery Industry Group Co., Ltd., and completed the formulation of optimal design methods for thin-walled sealed four-point contact ball bearings and thin-walled sealed cross roller bearings and the compilation of series product design drawings, Two types of typical bearings fpxu408-2rz and crb13025-2rs used by the handling robot were developed, which was equivalent to similar foreign products at that time, and the localization of special bearings for industrial robots was preliminarily realized.

In recent years, Luoyang axis Research Technology Co., Ltd. has studied the mechanism characteristics, stiffness, accuracy, friction torque, preload and application of Thin-walled bearing, qualitatively analyzed the design points of Thin-walled bearing and the influence of shafting support stiffness on bearing deformation, which provides technical support for the development of industrial mechanical human bearing in China.

Luoyang LYC bearing Co., Ltd. has conducted in-depth research on the types, structural characteristics, materials and heat treatment process, dimensional tolerance and rotation accuracy, rolling element accuracy, clearance and inspection methods of flexible bearings for harmonic drive.

Henan University of science and technology put forward the structural design method of lightweight green long-life thin-walled four point contact ball bearing, studied the relationship between the effective wall thickness of the bearing and the key performance indexes such as bearing capacity and starting friction torque, and put forward the recommended minimum wall thickness to ensure the service life and reliability.

In addition, some small-scale enterprises in Luoyang, such as weisige, have produced industrial robot bearings in small quantities for many years. The products are not only used for domestic industrial robot bearing hosts, but also exported to South Korea and other countries. These manufacturers have accumulated some experience in the manufacturing of industrial robot bearings. They persevere in the field of industrial robot bearings, which is valuable.

However, on the whole, the R & D of industrial robot bearings in China is insufficient, fragmented and engineering is not good, and the transformation of R & D achievements to productivity is not good. Those enterprises that produce industrial robot bearings in small quantities make use of the experience of technicians retired from large enterprises that have carried out industrial robot bearings. Without sufficient R & D and engineering, they directly produce in small quantities and supply to the main engine factory. Many problems are known and unknown.

The technical route for the development of robot bearings in China should be:

(1) Give full play to the basic role of market allocation of resources and promote the development of industrial robot bearing industry. We should not only advance in the face of difficulties, overcome the technical commanding point of robot bearings and gradually replace imports; Do not rush into mass action, resulting in overcapacity of high-end products such as industrial robot bearings.

(2) In the development of industrial robots, we can no longer follow the step-by-step process of R & D, engineering and industrialization, but should take the parallel development path of R & D, engineering and industrialization. To make up for R & D courses, the R & D institutions of industry leading enterprises and relevant universities and scientific research institutes should sort out, integrate and deepen the R & D achievements of industrial robot fragmentation over the years, especially in detection, inspection and industrial test, and strive to realize engineering. At the same time, according to the market demand, through the implementation of technical transformation projects, the production capacity is formed to meet the supporting needs of the host industry.

(3) We advocate that large enterprises with R & D capability and R & D foundation of industrial robot bearings and small and medium-sized enterprises with experience in small batch production of industrial robot bearings complement each other and win-win cooperation.

(4) Enterprises interested in developing industrial robot bearings should strive to establish strategic cooperative relations with industrial robot host enterprises, and invite relevant universities and scientific research institutes to join in to establish a strategic alliance for collaborative innovation of industrial robot bearings.

(5) The competent standardization department shall organize relevant enterprises (enterprises of both the supplier and the demander of industrial robot bearings), universities and scientific research institutes to formulate and implement a series of standards for industrial robot bearings on the basis of carefully summarizing the technical accumulation and practical experience of R & D, engineering and industrialization of industrial robot bearings.