Characteristic Analysis And Experimental Research On Flexible Thin-wall Rolling Bearing

Industrial robot is a key technology for Industry 4.0 and an important research area in Made in Chian 2025.Research on charactersitics of thin-wall rolling bearing and related experiment is beneficial for commanding the core technology of basic components of industrial robots.Firstly,mechanical properties of thin-wall rolling bearing is studied.From the kinematics characteristics of thin-wall rolling bearing,the distribution of angular velocity in the bearing holder on the circumference of the distribution,and track of roller relative to the holder are analyzed.According to thin-wall deformation theory and Hertz contact theory,the distribution of roller load and the contact stress between roller and ring are analyzed.Secondly,fatigue life and fault feature of thin-wall rolling bearing is studied.Based on the discussion of fatigue mechanism of thin-wall rolling bearing,three fatigue damage accumulation theories are introduced.Based on Lundberg-Palmgren theory,the fatigue life of thin-wall rolling bearing is calculated.The vibration mechanism and failure mode of thin-wall rolling bearing are introduced.Fault feature frequency and natural frequency of thin-wall rolling bearing are derived.Thirdly,the test rig for thin-wall rolling bearing is constructed.Base on the functional requirement of the test rig,the design of the test rig for thin-wall rolling bearing is elaborated from the view of mechanical design,electrical control and data acquisition.Lastly,mechanical experiments of thin-wall rolling bearing are conducted.In accordance with the requirements,conduct non-load test,fixed-load test and fixed-speed test of thin-wall rolling bearing.By using the sensor data,analyze the experimental phenomena.It shows that the test rig can satisfy different test condition for thin-wall rolling bearing.The test result is accordant with the theoratical analysis of thin-wall rolling bearing.