In this paper, a novel multi-ring blank holder technique is developed. The holding force (BHF) provided by each ring can be independently and effectively applied on all radial regions. principles advantages of the are first explained analyzed theoretical derivation, stress analysis, forming simulation. results indicate that distribution per unit area (FUA) new more reasonable than using convent...

there are many parameters that affect the sheet hydroforming process such as fluid pressure, material properties, interfacial friction between blank and tool surfaces, etc. in this paper, a fem-based taguchi method is used to determine the effects of forming parameters on the quality of part formability in the process of hydrodynamic deep drawing assisted by radial pressure. four important form...