虑及板坯几何和性能波动的薄壁件塑性成形数值模拟研究进展

Thin-walled metal blanks have inevitable fluctuations in geometry and performance parameters. The fluctuating parameters show strong dispersion and randomness, and are difficult to be accurately and quantitatively characterized. The fluctuation significantly increases the complexity of deformation of metal blanks in plastic forming, resulting in a decrease in forming quality and forming limit, especially in stamping and spinning of think-walled components with the characteristics of strong non-uniform deformation. Precise forming of thin-walled metal components is thus greatly restricted. This paper summarizes relevant research on characterization of geometry and performance fluctuation of the blank, the finite element model for plastic forming of thin-walled components considering blank geometry and performance fluctuation, influencing laws of the forming quality, and design and control of the technological parameters. The key problems and challenges are also discussed, providing a fundamental guidance for plastic forming of thin-walled components.