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Springback ratio matrix-based description and compensation for precision forming of doubly curved plates using reconfigurable dies

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Abstract

The cold forming process becomes necessary in ship hull panel production when certain physical properties cannot be altered. To achieve precise cold forming results for doubly curved hull plates using reconfigurable dies, this paper introduces springback ratio (SR) matrices and SR feature values as descriptors and compensatory measures for springback. The feasibility and validity of the SR matrix and SR feature value are confirmed through an examination of springback outcomes from nine single-curvature plates, as documented in existing literature. Theoretical deductions highlighted a substantial contrast between sail-type and saddle-type plates. Subsequently, 14 metal doubly curved plate forming experiments are introduced employing reconfigurable dies. Upon comparing the springback results of sail-type and saddle-type plates described by SR feature values, it becomes evident that saddle-type plates exhibit significantly less springback than sail-type plates. In response, a novel springback compensation algorithm is proposed based on SR matrices. This algorithm is compared with an existing method, and the results demonstrate its superior performance in springback compensation.

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This work was supported by the National Natural Science Foundation of China (Grant Nos. 51779200 and 51379167).

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Correspondence to Yong Hu.

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Zhao, H., Shi, F. & Hu, Y. Springback ratio matrix-based description and compensation for precision forming of doubly curved plates using reconfigurable dies. Int J Adv Manuf Technol 130, 5853–5867 (2024). https://doi.org/10.1007/s00170-023-12933-6

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