关键词: 钣金件, 数字化检测, 对齐, 回弹, 贴模度

Abstract: To solve the problem of computing springback gap accurately,a computation method based on constrained and hierarchical strategy was presented by considering the influence of springback deformations on model alignment.The threshold of springback value was obtained from the statistical analysis of current springback,and the deformation points resulted from springback were pushed out.The alignment of sheet metal part and model was realized with constraints,and springback gaps computation was made on this basis.A certain load simulate assembly stress was added to sheet metal part when the springback gap were unqualified,and the springback gap was calculated under the load-deformation.The validity and practicability of proposed method was verified through the test on a U-shaped simulation model and a real aircraft rib.

Key words: sheet metal part, digital inspection, alignment, springback, springback gap