Journal of Jilin University(Engineering and Technology Edition) ›› 2022, Vol. 52 ›› Issue (2): 353-360.doi: 10.13229/j.cnki.jdxbgxb20211084

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Modeling and analysis of contact load of ball screw with error of structural parameters

Qiang CHENG1,2(),Chang WANG1,2,Bao-bao QI3,Cai-xia ZHANG1,2(),Cong-bin YANG1,2,Zhi-feng LIU1,3   

  1. 1.Institute of Advanced Manufacturing and Intelligent Technology，Beijing University of Technology，Beijing 100124，China
    2.Beijing Key Laboratory of Advanced Manufacturing Technology，Beijing University of Technology，Beijing 100124，China
    3.College of Mechanical and Aerospace Engineering，Jilin University，Changchun 130022，China
  • Received:2021-10-22 Online:2022-02-01 Published:2022-02-17
  • Contact: Cai-xia ZHANG E-mail:chengqiang@bjut.edu.cn;zhang_cx15@bjut.edu.cn

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Abstract:

In order to improve the positioning accuracy of ball screw pair， a double-nut ball screw load distribution model considering the geometric error of the ball under the compound load is proposed in this paper. The distribution of all ball contact loads under the compound action of different coaxial and radial loads is analyzed. On this basis， the influence of ball geometric error on dynamic and static contact load distribution is analyzed. The simulation results show that the load distribution model proposed in this paper has good reference significance for improving the position accuracy prediction and positioning error compensation of ball screw pair.

Key words: ball screw pair, contact load, structural error, double nut

CLC Number: 

  • TH132

Table 1

Structural parameters of ball screw"

D/mmrj/mmro/mmDo/mmE1,E2/MPaμ1,μ2β0/ （°）α/ （°）zn
6.353.3023.302322.1×1050.3455.68482.5

Fig.1

Contact load distribution of ball bearing without dimensional error"

Fig.2

Distribution of ball contact load under different radial loads"

Fig.3

Ball contact load distribution under different coaxial loads"

Fig.4

Contact load distribution of No.3 ball has a positive size error of 3 μm"

Fig.5

Distribution of ball contact load on the left and right nut with a positive size error of 3 μm for no.3 ball"

Fig.6

Contact load distribution of No.3 ball bearing has negative size error of 3 μm"

Fig.7

Distribution of ball contact load of left and right nut with negative size error of 3 μm"

Fig.8

Load distribution of ball bearing with random size error"

Fig.9

Distribution of ball contact load on left nut with random size error"

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