Abstract
Machining distortion has been a long-term obstacle in the machining of aircraft monolithic parts. Furthermore, its stability has to be considered. The machining distortion stability represents the fluctuation degree of the machining distortion. This paper investigates the evolution of elastic energy induced by initial residual stress inside materials, revealing that this evolution directly affects machining distortion. In this paper, the concept of machining distortion stability and bending potential energy is defined. By analyzing bending potential energy releasing, this study proposes a novel method for improving machining distortion stability through optimization of material removal sequence. Numerical simulation and milling experiments are performed to verify and validate the model, respectively. The results indicate that the machining distortion stability is significantly improved when optimized material removal sequence is applied. By controlling the machining distortion stability, the final distortion can be further reduced via re-machining the machining datum at the beginning of the finishing stage.
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This work is supported by the National Natural Science Foundation of China (Grant Nos. 52075251, U1601204) and National Science and Technology Major Project (2017-VII-0001-0094).
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Fan, L., Li, L., Yang, Y. et al. Control of machining distortion stability in machining of monolithic aircraft parts. Int J Adv Manuf Technol 112, 3189–3199 (2021). https://doi.org/10.1007/s00170-021-06605-6
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DOI: https://doi.org/10.1007/s00170-021-06605-6