吉林大学学报(工学版) ›› 2018, Vol. 48 ›› Issue (3): 767-772.doi: 10.13229/j.cnki.jdxbgxb20170070

• Orginal Article • Previous Articles     Next Articles

Test time design of motorized spindle accelerated life test based on Weibull distribution

ZHENG Yu-bin1, YANG Bin1, WANG Xiao-feng2, SHEN Gui-xiang1, ZHAO Xian-zhuo1, QIN Meng-meng1   

  1. 1.College of Mechanical Science and Engineering, Jilin University, Changchun 130022, China;
    2.College of Construction Engineering,Jilin University,Changchun 130026,China
  • Received:2017-01-19 Online:2018-05-20 Published:2018-05-20

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Abstract: Based on the characteristics that the first failure time of motorized spindle obeys Weibull distribution, a reliability test time design model is established considering the first failure time corresponding to acceptable reliability. Then, Combined with the modified Miner linear cumulative damage law and the program load spectrum of motorized spindle, the accelerating factor model of the accelerated life test of motorized spindle is established. On the basis, the acceleration factor and the test time of the accelerated life test are quantitatively determined, and the dependability of the test time design is evaluated by calculating the prior distribution and posterior distribution of the failure rate. Experimental results show that the proposed method is feasible and can provide the basis for the scheme design of accelerated life test of motorized spindle.

Key words: machine tool, electric spindle, Weibull distribution, modified Miner linear cumulative damage law, accelerating factor, test time design

CLC Number: 

  • TH122
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