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Optimization design method of machine tool static geometric accuracy using tolerance modeling

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Abstract

Existing precision design methods cannot directly guide the tolerance design. Therefore, in this study, an optimization design method of machine tool static geometric accuracy based on tolerance modeling is proposed. In this methodology, the mapping relationship between the geometric error of machine tools and tolerance design is established using the small displacement torsor to represent the tolerance information and the Monte Carlo simulation method is used to establish the response model of the torsor parameters and the tolerance variation bandwidths. An assembly accuracy model is then established by combining a machine tool topology analysis and the forming mechanism of the joint surface error. To calculate the tolerances of the component joint surface, a tolerance response model related to the component joint surface tolerance and torsor parameters is developed. Finally, according to the state function of assembly accuracy reliability, a function response model of the assembly accuracy, reliability, and tolerance is developed. Combining the assembly’s processing cost model with the accuracy, reliability, and tolerance principles, a tolerance optimization model of the static geometric accuracy of a CNC machine tool, a linear axis motion guide, is constructed as a case study. Using a simulated annealing genetic algorithm to solve the tolerance optimization model, the tolerance optimization value is obtained, thereby verifying the effectiveness of the proposed method.

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Funding

The authors wish to thank the major technological innovation projects in Chengdu (2019-YF08-00162-GX), which supported the research presented in this paper.

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Authors and Affiliations

  1. School of Electronic Information and Electrical Engineering, Chengdu University, No. 2025 Chengluo Avenue, Chengdu, 610106, Sichuan, China

    Haorong Wu & Yongxin Zhao

  2. School of Mechanical Engineering, Chengdu University, Chengdu, 610106, Sichuan, China

    Xiaoxiao Li & Fuchun Sun

  3. School of Mechatronic Engineering, Southwest Petroleum University, Chengdu, 610500, Sichuan, China

    Hualin Zheng

Authors
  1. Haorong Wu
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  2. Xiaoxiao Li
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  3. Fuchun Sun
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  4. Hualin Zheng
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  5. Yongxin Zhao
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Contributions

Haorong Wu: Conceptualization, Methodology, Software, Investigation, Writing—original draft, Writing—review & editing. Xiaoxiao Li: Validation, Formal analysis, Visualization. Fuchun Sun: Validation, Formal analysis, Visualization, Software. Hualin Zheng: Validation, Formal analysis, Visualization. Yongxin Zhao: Formal analysis.

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Correspondence to Haorong Wu.

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Wu, H., Li, X., Sun, F. et al. Optimization design method of machine tool static geometric accuracy using tolerance modeling. Int J Adv Manuf Technol 118, 1793–1809 (2022). https://doi.org/10.1007/s00170-021-07992-6

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  • DOI: https://doi.org/10.1007/s00170-021-07992-6

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