Advances in Manufacturing ›› 2024, Vol. 12 ›› Issue (3): 428-446.doi: 10.1007/s40436-024-00492-2

• • 上一篇    

A multi-objective optimization based on machine learning for dimension precision of wax pattern in turbine blade manufacturing

Jing Dai, Song-Zhe Xu, Chao-Yue Chen, Tao Hu, San-San Shuai, Wei-Dong Xuan, Jiang Wang, Zhong-Ming Ren   

  1. State Key Laboratory of Advanced Special Steels, School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, People's Republic of China
  • 收稿日期:2023-11-01 修回日期:2023-12-21 发布日期:2024-09-07
  • 通讯作者: Song-Zhe Xu,E-mail:songzhex@shu.edu.cn E-mail:songzhex@shu.edu.cn
  • 作者简介:Jing Dai is a Ph.D. candidate at the School of Materials Science and Engineering, Shanghai University. His research interests include intelligent manufacturing and investment casting;
    Song-Zhe Xu is an assistant professor and master supervisor at Shanghai University. His research areas include high performance computing, machine lear ning and intelligent manufacturing;
    Chao-Yue Chen is an associate professor and master supervisor at Shanghai University. His research interests include metal additive manufacturing and superalloys;
    Tao Hu is an associate professor and master supervisor. His research interests include computational materials and alloy design;
    San-San Shuai is an associate professor and doctoral supervisor. His research interests include metal solidification under magnetic field, and nondestructive testing technology. Wei-Dong Xuan is a professor and doctoral supervisor at Shanghai University. His research interests include metal solidification, superalloys, and investment casting;
    Jiang Wang is a professor and doctoral supervisor at Shanghai University. His research interests include magnetic field-controlled metal solidification and additive manufacturing;
    Zhong-Ming Ren is a professor and doctoral supervisor at Shanghai University, and he is the Director of the State Key Laboratory of Advanced Special Steels. His research areas include electromagnetic metallurgy and investment casting.
  • 基金资助:
    This work was funded by the National Key Research and Development Program of China (Grant No. 2019YFA0705302) and the National Science and Technology Major Project “Aeroengine and Gas Turbine” of China (Grant No. 2017-VII-0008-0102).

A multi-objective optimization based on machine learning for dimension precision of wax pattern in turbine blade manufacturing

Jing Dai, Song-Zhe Xu, Chao-Yue Chen, Tao Hu, San-San Shuai, Wei-Dong Xuan, Jiang Wang, Zhong-Ming Ren   

  1. State Key Laboratory of Advanced Special Steels, School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, People's Republic of China
  • Received:2023-11-01 Revised:2023-12-21 Published:2024-09-07
  • Contact: Song-Zhe Xu,E-mail:songzhex@shu.edu.cn E-mail:songzhex@shu.edu.cn
  • Supported by:
    This work was funded by the National Key Research and Development Program of China (Grant No. 2019YFA0705302) and the National Science and Technology Major Project “Aeroengine and Gas Turbine” of China (Grant No. 2017-VII-0008-0102).

摘要: Wax pattern fabrication in the investment casting of hollow turbine blades directly determines the dimension accuracy of subsequent casting, and therefore significantly affects the quality of final product. In this work, we develop a machine learning-based multi-objective optimization framework for improving dimension accuracy of wax pattern by optimizing its process parameters. We consider two optimization objectives on the dimension of wax pattern, i.e., the surface warpage and core offset. An active learning of Bayesian optimization is employed in data sampling to determine process parameters, and a validated numerical model of injection molding is used to compute objective results of dimension under varied process parameters. The collected dataset is then leveraged to train different machine learning models, and it turns out that the Gaussian process regression model performs best in prediction accuracy, which is then used as the surrogate model in the optimization framework. A genetic algorithm is employed to produce a non-dominated Pareto front using the surrogate model in searching, followed by an entropy weight method to select the most optimal solution from the Pareto front. The optimized set of process parameters is then compared to empirical parameters obtained from previous trial-and-error experiments, and it turns out that the maximum and average warpage results of the optimized solution decrease 26.0% and 20.2%, and the maximum and average errors of wall thickness compared to standard part decrease from 0.22 mm and 0.051 7 mm using empirical parameters to 0.10 mm and 0.035 6 mm using optimized parameters, respectively. This framework is demonstrated capable of addressing the challenge of dimension control arising in the wax pattern production, and it can be reliably deployed in varied types of turbine blades to significantly reduce the manufacturing cost of turbine blades.

The full text can be downloaded at https://link.springer.com/article/10.1007/s40436-024-00492-2

关键词: Hollow turbine blade, Wax pattern fabrication, Dimension control, Multi-objective optimization, Machine learning, Numerical simulation

Abstract: Wax pattern fabrication in the investment casting of hollow turbine blades directly determines the dimension accuracy of subsequent casting, and therefore significantly affects the quality of final product. In this work, we develop a machine learning-based multi-objective optimization framework for improving dimension accuracy of wax pattern by optimizing its process parameters. We consider two optimization objectives on the dimension of wax pattern, i.e., the surface warpage and core offset. An active learning of Bayesian optimization is employed in data sampling to determine process parameters, and a validated numerical model of injection molding is used to compute objective results of dimension under varied process parameters. The collected dataset is then leveraged to train different machine learning models, and it turns out that the Gaussian process regression model performs best in prediction accuracy, which is then used as the surrogate model in the optimization framework. A genetic algorithm is employed to produce a non-dominated Pareto front using the surrogate model in searching, followed by an entropy weight method to select the most optimal solution from the Pareto front. The optimized set of process parameters is then compared to empirical parameters obtained from previous trial-and-error experiments, and it turns out that the maximum and average warpage results of the optimized solution decrease 26.0% and 20.2%, and the maximum and average errors of wall thickness compared to standard part decrease from 0.22 mm and 0.051 7 mm using empirical parameters to 0.10 mm and 0.035 6 mm using optimized parameters, respectively. This framework is demonstrated capable of addressing the challenge of dimension control arising in the wax pattern production, and it can be reliably deployed in varied types of turbine blades to significantly reduce the manufacturing cost of turbine blades.

The full text can be downloaded at https://link.springer.com/article/10.1007/s40436-024-00492-2

Key words: Hollow turbine blade, Wax pattern fabrication, Dimension control, Multi-objective optimization, Machine learning, Numerical simulation