Sheet hydroform product, sheet hydroform molding method, and sheet hydroform molding apparatus using the same

摘要

PPROBLEM TO BE SOLVED: To provide a sheet hydroforming product which is excellent in repeat accuracy, with which good dimensional accuracy and shaft collapse property are secured and collision energy absorptivity is improved. PSOLUTION: This product is the sheet hydroforming product which is composed of three or more metallic sheets in which a reinforcing sheet is arranged in the intermediate part and both edge parts along the longitudinal direction or the whole peripheral part is lap-welded and out-of-plane deformed part is formed in the reinforcing sheet when observing a cross-sectional shape in a rectangular face in the longitudinal direction. Furthermore, in the sheet hydroforming product, the method for hydroforming a sheet and the apparatus for hydroforming the sheet and the sheet hydroforming apparatus using the same, the out-of-plane deformation formed the reinforcing sheet can be formed by press working or a bulging work by hydroforming. PCOPYRIGHT: (C)2007,JPO&INPIT