| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of forming a bulged surface on a metallic sheet by which a metallic container having a bulged surface is manufactured at low cost and in a short delivery time because a die and a forming die requiring a high manufacturing cost and a long delivery time are not necessary and by which a bulged surface with excellent reliability, durability and versatility and an excellent degree of freedom of design is produced with ease, and to provide a three-dimensional formation using the same, a manufacturing method of a metallic container having a bulged surface and a pressure vessel obtained by the method. SOLUTION: This method of forming the bulged surface of the metallic sheet is provided with: a polyhedron forming stage where a hollow polyhedron 4 is formed by performing the butt welding of individual edge parts of a planar or two-dimensionally curved-surface metallic sheets 1, 1a, 3, 3a; a hollow body forming stage where a hollow body 15 is formed by forming the bulged surface on the metallic sheets 1, 1a, 3, 3a by pressing them from the inside by supplying a fluidic medium to the inside of the hollow polyhedron 4; a discharging stage where the fluid medium is discharged from the inside of the hollow body 15; and a cutting-off stage where the metallic sheets are cut off from the hollow body 15 into a prescribed shape. COPYRIGHT: (C)2004,JPO&NCIPI
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