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Optimization of the process parameters for micro-milling thin-walled micro-parts using advanced algorithms

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Abstract

The surface integrity and machining accuracy of thin-walled micro-parts are significantly affected by micro-milling parameters mostly because of their weak stiffness. Furthermore, there is still a lack of studies focusing on parameter optimization for the fabrication of thin-walled micro-scale parts. In this paper, an innovative approach is proposed for the optimization of machining parameters with the objectives of surface quality and dimension accuracy, which integrates the Taguchi method, principal component analysis method (PCA), and the non-dominated sorting genetic algorithm (NSGA-II). In the study, surface arithmetic average height Sa, surface root mean square height Sq, and 3-D fractal dimension Ds are selected to evaluate surface quality. Then micro-milling experiments are conducted based on the Taguchi method. According to the experimental results, the influence of machining parameters on the processing quality has been investigated based on the cutting force and machining stability analysis, and the significance of machining parameters can be determined by range analysis. Besides, regression models for the responses are developed comparatively, and the PCA method is employed for dimension reduction of the optimization objective space. Finally, two combinations of machining parameters with the highest satisfaction are obtained through NSGA-II, and verification experiments are carried out. The results show that the surface quality and dimension accuracy of the thin-walled micro-scale parts can be simultaneously improved by using the proposed approach.

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Data availability

The datasets used or analyzed during the current study are available from the corresponding author on reasonable request.

Code availability

This paper uses proprietary software and will be not available.

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Funding

This research work was supported by the National Natural Science Foundation of China (Grant No. 52075129).

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Authors and Affiliations

  1. School of Mechanical and Electrical Engineering, Harbin Institute of Technology, Harbin, 150001, China

    Peng Wang, Qingshun Bai, Liang Zhao & Hui Ding

  2. Department of Mechanical and Aerospace Engineering, Brunel University London, Uxbridge, UB8 3PH, UK

    Kai Cheng

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  1. Peng Wang
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  2. Qingshun Bai
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  4. Liang Zhao
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Contributions

Peng Wang: conceptualization, methodology, and writing—original draft. Qingshun Bai: funding acquisition, supervision, formal analysis, and writing—review and editing. Kai Cheng: supervision, formal analysis, and writing—review and editing. Liang Zhao: validation, investigation, and equipment. Hui Ding: validation.

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Correspondence to Qingshun Bai.

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Wang, P., Bai, Q., Cheng, K. et al. Optimization of the process parameters for micro-milling thin-walled micro-parts using advanced algorithms. Int J Adv Manuf Technol 121, 6255–6269 (2022). https://doi.org/10.1007/s00170-022-09729-5

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  • DOI: https://doi.org/10.1007/s00170-022-09729-5

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