Journal of Jilin University(Engineering and Technology Edition) ›› 2022, Vol. 52 ›› Issue (2): 458-465.doi: 10.13229/j.cnki.jdxbgxb20211106

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Reliability design model of ball screws based on competition failure

Lu LIU1,2(),Hua-xi ZHOU1,2,Chuan-hai CHEN3,4,Meng-hui GONG1,2,Hu-tian FENG1,2,Chang-guang ZHOU1,2()   

  1. 1.Department of Mechanical Engineering，Nanjing University of Science and Technology，Nanjing 210094，China
    2.Key Laboratory of Performance Test Evaluation and Reliability Technology for Functional Components of CNC Machine Tools，Suzhou 215600，China
    3.Key Laboratory of CNC Equipment Reliability，Ministry of Education，Jilin University，Changchun 130022，China
    4.College of Mechanical and Aerospace Engineering，Jilin University，Changchun 130022，China
  • Received:2021-10-26 Online:2022-02-01 Published:2022-02-17
  • Contact: Chang-guang ZHOU E-mail:liu_lu@njust.edu.cn;zhoucg@njust.edu.cn

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Abstract:

This study presents a competitive failure model considering performance degradation failure and fatigue pitting failure. Considering the relationship among the reliability and structural parameters about diameter of the ball， radius of the raceway， contact angel and friction coefficient etc.， the reliability design model is established， and the reliability quantitative design method is proposed.

Key words: ball screws, reliability design model, fatigue failure, competition failure

CLC Number: 

  • TH165

Fig.1

Stress analysis of double-nut ball screw"

Fig.2

Diagram of stress cycle number of screw and nut raceway"

Fig.3

Force-displacement of left and right nut in a preloaded ball screw"

Table1

Parameter table of ball screw for test"

参数数值
滚珠直径Db/mm5.953
节圆直径Dm/mm40
导程角γ/（°）4.55
接触角/（°）45
导程Ph/mm10
初始预紧力/N2881
施加载荷/N4500

Fig.4

Preload degradation of ball screw"

Fig.5

Reliability curve of ball screw"

Fig.6

Influence of ball diameter on reliability of ball screw at 5 million rotary speeds"

Fig.7

Influence of contact angle on reliability of ball screw at 5 million rotary speeds"

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