Transmission precision reliability analysis method for industrial robot speed reducer with crack gear

Abstract

The invention discloses a transmission precision reliability analysis method for an industrial robot speed reducer with a crack gear. The method comprises the steps of analyzing firstly, uncertainty factors of the industrial robot speed reducer; secondly, analyzing the meshing rigidity of the gear with the cracks by using a finite element simulation method, further solving a kinetic equation, andcalculating a transmission error of the gear with the cracks; then calculating a probability density function of the output error of the industrial robot speed reducer by applying a probability density evolution theory and a Dirac function; and finally, calculating the transmission precision reliability of the industrial robot speed reducer with the crack gear by using a Monte Carlo simulation method. According to the method, probability density evolution and a Dickelas function are applied to reliability evaluation of mechanical parts, and multi-degree-of-freedom linear and nonlinear mechanical structure dynamic performance response depiction and reliability calculation under uncertainty factor input can be described in a high-precision and high-efficiency mode.

Description

Technical field [0001] The invention belongs to the field of reliability of mechanical parts, and specifically relates to a method for analyzing the reliability of transmission accuracy of an industrial robot reducer with cracked gears. Background technique [0002] Industrial robots are developing in the direction of high speed, high precision, high reliability, multiple degrees of freedom and improved rigidity. Key areas also require heavy load or high response speed. As one of the core components of industrial robots, the reducer is the core of mechanical transmission, and its transmission accuracy and reliability affect the speed and accuracy of the robot. Due to the influence of random factors such as manufacturing error, assembly clearance, material performance, use environment, etc., the transmission performance of industrial robot reducer, that is, RV reducer, is random. Therefore, in order to improve the transmission accuracy of RV reducer, these factors need to be consi...

AI Technical Summary

Problems solved by technology

When the gear of the RV reducer has cracks, its transmission accuracy will inevitably be affected, but no relevant effective method has been proposed to solve the problem of reliability analysis of its transmission accuracy considering various uncertain inputs

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