面向航空铝合金薄壁深腔构件的冲击液压成形工艺优化

doi:10.7527/S1000-6893.2020.24831

Abstract

Abstract: To realize one-step forming of aeronautical components of LY12 aluminum alloy sheets with thin wall and deep cavity by impact hydroforming, the response surface method combined with the impact hydroforming experiment was employed to optimize the process parameters. A model for the response between the response quantity and the optimization variable was established by taking the thinning rate and the sticking rate as the response quantity, and the blank holder force and impact force as optimization variables. The central composite design method was selected for experimental design, and experimental scheme was designed with the software of Design Expert 12. The first-order response model on the thinning rate and the second-order response model on the sticking rate were established. The optimization results show that when the blank holder force is 1.443 MPa and the impact force is 12.594 MPa, the requirements for thinning rate and filming rate can be reached at the same time. The relative error between the thinning rate and the predicted value is less than 5%. The results show that the proposed response surface model has good accuracy and predictability. The cylindrical components formed by the optimized process parameters meet the requirements on product quality.

Key words: aeronautical complex-shaped thin-walled component, impact hydroforming, response surface method, central composite design, process parameters optimization

CLC Number:

V261.7⁺4

XU Yong, YIN Kuo, XIA Liangliang, MEN Xiangnan, ZENG Yipan, ZHANG Shihong. Optimization of impact hydroforming process for aeronautical components of aluminum alloy sheets with thin wall and deep cavity[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2021, 42(10): 524831-524831.

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Optimization of impact hydroforming process for aeronautical components of aluminum alloy sheets with thin wall and deep cavity

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