Journal of Jilin University(Engineering and Technology Edition) ›› 2025, Vol. 55 ›› Issue (6): 1906-1914.doi: 10.13229/j.cnki.jdxbgxb.20230947

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Global reliability sensitivity analysis of deformation for machine tool rotary table

Xian-zhen HUANG1,2(),Ming-fei MA1,Chao LI1,Xu WANG1,Zhi-ming RONG3()   

  1. 1.School of Mechanical Engineering and Automation，Northeastern University，Shenyang 110819，China
    2.Key Laboratory of Vibration and Control of Aero-Propulsion Systems Ministry of Education of China，Northeastern University，Shenyang 110819，China
    3.Apllied Technology College of Dalian Ocean University，Dalian 116399，China
  • Received:2023-09-06 Online:2025-06-01 Published:2025-07-23
  • Contact: Zhi-ming RONG E-mail:xzhhuang@mail.neu.edu.cn;rongzhiming@dlou.edu.cn

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Abstract:

In view of the problem that the rotary table will deform due to bearing large loads during machine tool processing， which will affect the processing accuracy and consistency，this paper proposes a reliability analysis model for the deformation behavior of the rotary table that considers the influence of random factors. The model treats the rotary table as a system， and uses the maximum deformation of the rotary table as the criterion for reliability analysis. The study explores the global reliability changes of the entire system under different load conditions and calculates the global sensitivity of each parameter to system failure. The results indicate that the material parameters of the table plate， rotary seat， and sliding seat have a significant impact on the reliability of the rotary table system， with the sensitivity index of the elastic modulus being greater than that of density and Poisson's ratio being the smallest.

Key words: mechanical design, machine tool rotary table, statics, reliability, sensitivity

CLC Number: 

  • TG659

Fig.1

Tooth disc-type rotary table"

Fig.2

Schematic diagram of the structure of tooth disc-type rotary table"

Fig.3

Flow chart of mechanical performance analysis of rotary table"

Fig.4

Finite element model of the rotary table"

Fig.5

Flow chart of reliability analysis based on adaptive Kriging model"

Table 1

Main structure and material properties of the rotary table"

零件材料质量/kg
工作台板HT300188
回转座HT300150
滑座HT300580
鼠牙盘38CrMoAlA20×2
分油轴4513.7
活塞4539
油缸体4562
油缸端盖455.6
蜗轮ZQSn10-129.6
蜗杆38CrMoAlA9.2
转台轴承GCR15SiMn25

Fig.6

Comparison of calculation results of different grid numbers"

Fig.7

Deformation and strain deformation nephogram of the overall structure"

Fig.8

Deformation and stress and strain of the overall structure change with load"

Table 2

Rotary table parameter random variable table"

参数数值分布变异系数
ρ1/（kg·m-3）7 850正态分布0.05
E1/GPa212.5正态分布0.05
μ10.29正态分布0.05
ρ2/（kg·m-3）7 850正态分布0.05
E2/GPa210正态分布0.05
μ20.28正态分布0.05
ρ3/（kg·m-3）7 200正态分布0.05
E3/GPa110正态分布0.05
μ30.28正态分布0.05

Fig.9

Relationship between the number of adaptive learning and the confidence level"

Fig.10

Comparison of Kriging calculated value and finite element analysis value"

Fig.11

Absolute error between Kriging calculated value and finite element analysis value"

Fig.12

Probability density of system deformation"

Fig.13

System reliability changes with load"

Fig.14

Global sensitivity analysis"

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