Device and method for testing bearing precision performance and method for determining bearing precision initial failure part

Abstract

The invention discloses a device and method for testing bearing precision performance and a method for determining a bearing precision initial failure part. The device comprises a main shaft and a servo motor which are mounted on two machine frames respectively, wherein a main shaft shell is sleeved outside the main shaft, the main shaft is fixed on one machine frame through the main shaft shell, the rear end of the main shaft is fixedly connected with an output shaft of the servo motor, radial through holes for an acceleration sensor and a temperature sensor to be mounted in are formed in a face, matched with a tested bearing, of the main shaft shell, and a part, stretching out of the main shaft shell, of the front end of the main shaft is provided with a displacement sensor used for measuring the radial jump of the front end of the main shaft. The main shaft and the servo motor are mounted on the two machine frames respectively, the influence of vibration of the servo motor on the main shaft is reduced, a pair of precise angular contact ball bearings is arranged at the rear end of the main shaft for supporting, and the rotating precision and rigidity of the main shaft are improved. A constant-pressure pre-tightening device is mounted, the types and the number of springs can be changed according to requirements of a test, so that constant-pressure pre-tightening of the tested bearing is achieved.

Description

technical field [0001] The invention belongs to the field of rolling bearing precision testing and failure analysis, relates to a bearing precision performance testing device and testing method and a method for determining early failure parts of bearing precision, an error separation method based on the two-point method and a method based on EEMD and resonance Detuned Rolling Bearing Adaptive Precision Early Failure Analysis Method. Background technique [0002] Rolling bearings are one of the most widely used important basic parts in mechanical equipment, especially on high-speed and high-precision manufacturing machines, the changes in the rotational accuracy of rolling bearings, the analysis of early failure of bearing accuracy, and the control of parameters such as acceleration and spindle runout, etc. Will directly affect the quality of the processed workpiece. Therefore, before the bearing leaves the factory, a long-term running test is carried out on the same batch o...

AI Technical Summary

Problems solved by technology

At present, the widely used rotation accuracy measurement method is the traditional meter measurement, the measurement speed is low, it is not real-time, and the measurement result error is large; similarly, the widely used bearing accuracy failure analysis method is backward, especially for the early failure of bearing accuracy. The weak impact signal in the environment cannot be effectively identified and extracted, and its application value in engineering practice is small

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