整体壁板压弯成形的形状控制

doi:10.7527/S1000-6893.2020.23620

Abstract

Abstract: To solve the problems of low precision and uncontrollability caused by springback during the press bend forming of integral panels, this paper proposes a shape control method for bent parts. The specimen is designed with the aluminum alloy (7050-T7451) aircraft integral panel as the research object. In addition, the displacement prediction model of the local deformation is established based on the elastoplastic deformation theory and geometric analysis. A finite element simulation prediction model for the overall deformation of press bend forming is then developed, and the simulation results are compared with the test results. Furthermore, on the basis of the prediction model and considering the local-to-global deformation precision, this study constructs the contour curve iterative model based on the iterative compensation mechanism and the step by step approximation method. Compared with the traditional trial and error method, the proposed method can effectively control the shape of the bent parts with higher precision and faster convergence speed.

Key words: integral panels, press bend forming, shape control, iterative compensation, finite element simulation

CLC Number:

ZHANG Min, TIAN Xitian, LI Bo. Shape control for press bend forming of integral panels[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2020, 41(7): 623620-623620.

References 27

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Shape control for press bend forming of integral panels

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