Abstract
This article presents the establishment of the relationship between the maximum wall thinning and the relative height of the product during the free deformation stage in sheet hydrostatic forming of stainless steel SUS304. The numerical simulation and experiment are carried out using different input parameters for comparison and evaluation. The finite element method model with Dynaform was used to simulate the deformation process. The process and die parameters selected for the study include forming pressure (Pth), die radius (Rd), and blank holder pressure (Fh), while the responses are the maximum wall thinning ΔSmax (%) and the relative height of the product Hp (%). The relationship between ΔSmax and Hp also was built by changing the input parameters. This result allows us to determine the relative height of the deformed part with the corresponding maximum wall thinning. The research results provide useful technological recommendations for hydrostatic forming in the free deformation stage.
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