Effect of fluid pressure on the thickness distribution of single-layer and double-layer cups

In recent years, sheet hydrostatic forming technology has been widely applied to the production of thin-shell components due to its advantages and suitability. The blank is shaped to match the contour of the die under the influence of high-pressure fluid. Therefore, understanding the deformation of the blank under this fluid pressure is essential. While numerous studies have focused on single-layer material blanks, further research is needed on multilayer material blanks. This study examines the behaviors of single-layer and double-layer materials during the hydrostatic forming process. The results reveal differences in the forming process for cylindrical products made from single- and double-layer materials. Graphs illustrating the influence of various process parameters on product quality and the contribution of each material layer in double-layer materials are also presented. The study explores the impact of fluid pressure on sheet thinning and methods to enhance the forming ability through simulations and experiments. The simulation results show a reasonable agreement with experimental observations. These findings facilitate the assessment and prediction of forming outcomes, providing a foundation for future research.