US 12,111,225 B2
Accelerated life test method for speed reducer of industrial robot
Xu Han, Tianjin (CN); Shuyong Duan, Tianjin (CN); Xin Gao, Tianjin (CN); Yourui Tao, Tianjin (CN); Nan Ye, Tianjin (CN); and Jia Wang, Tianjin (CN)
Assigned to Hebei University of Technology, Tianjin (CN)
Filed by Hebei University of Technology, Tianjin (CN)
Filed on Jul. 19, 2022, as Appl. No. 17/868,399.
Claims priority of application No. 202111428249.9 (CN), filed on Nov. 29, 2021.
Prior Publication US 2023/0168148 A1, Jun. 1, 2023
Int. Cl. G01M 13/021 (2019.01); B25J 9/10 (2006.01); B25J 19/00 (2006.01)
CPC G01M 13/021 (2013.01) [B25J 9/1025 (2013.01); B25J 19/0095 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An accelerated life test method for a speed reducer of an industrial robot, comprising:
setting a first load stress higher than a rated load stress, and a second load stress lower than the rated load stress;
performing an accelerated life test by loading the first load stress to first speed reducer samples;
calculating a service life of each of the first speed samples in the accelerated life test;
performing a contrast test by loading the second load stress to second speed reducer samples;
calculating a service life of each of the second speed samples in the contrast test;
calculating an acceleration coefficient, wherein the acceleration coefficient is equal to a ratio of the service life in the accelerated life test to the service life in the contrast test;
estimating a lifetime of the speed reducer according to the acceleration coefficient;
and servicing or replacing the speed reducer before it has reached its estimated lifetime.