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Multi-Objective Evolutionary Neural Network Optimization of Process Parameters for Double-Stepped Tube Hydroforming

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Abstract

Achieving sharp corners without defects such as thinning and fractures is a primary objective in the manufacturing of double-stepped tubes. Therefore, selecting the optimal tube hydroforming (THF) process is crucial for improving the formability when manufacturing complex components. In this study, experimental and numerical study was conducted to analyze the radius of the corner and the thickness of the sample in the hydroforming process for double-stepped tubes. The pressure, axial feed, and friction coefficient were considered as input parameters, while the thinning ratio and corner filling were considered as output responses. The optimal hydroforming parameter combination for the corner filling ratio and the minimum thinning ratio was determined based on artificial neural networks. The values of the process parameters obtained from the finite element (FE) simulation and the artificial neural network (ANN) have a good correlation. The proposed method combining FE model and ANN is a precious tool for designing the THF process. Based on the results, it was confirmed that the feed rate has significant influence on the thinning ratio and corner filling.

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Acknowledgements

This work was supported by the Korean government (MSIT) through the National Research Foundation of Korea (NRF) [grant number 2019R1A5A6099595].

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Correspondence to Ji Hoon Kim.

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Ghorbani-Menghari, H., Kahhal, P., Jung, J. et al. Multi-Objective Evolutionary Neural Network Optimization of Process Parameters for Double-Stepped Tube Hydroforming. Int. J. Precis. Eng. Manuf. 24, 915–929 (2023). https://doi.org/10.1007/s12541-023-00802-x

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