Hydraulic bulge molding product and hydraulic bulge molding method

摘要

PPROBLEM TO BE SOLVED: To provide a hydrostatic bulge forming method by which welding stage in the manufacturing process of the parts such as automobile parts is simplified and a hydrostatically bulged article provided with an engaging part having high reliability in strength. PSOLUTION: This formed article is a formed article by hydrostatic bulging which is bulged by injecting and pressurizing working fluid between the mating faces of a plurality of superposed blanks 40a, 40b of metallic sheets from an injection hole provided on the blanks of the metallic sheets. The formed article by the hydrostatic bulging having the engaging parts 34 which are integrally formed with a flange of the formed article by the hydrostatic bulging and its forming method are provided. PCOPYRIGHT: (C)2006,JPO&NCIPI