| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and a device for manufacturing a cylindrical member integrally in which a flange projecting to a radial direction outer side is integrally formed on a bottom part outer periphery.SOLUTION: In a method for manufacturing a cylindrical member with a flange, an inner side mold 41a which is positioned on an inner side of an outer peripheral wall 2a of a bottomed cylindrical restriction component 2 and a cylindrical ironing mold 41c which is positioned on an outer side of the outer peripheral wall of the bottomed cylindrical restriction component and is located coaxially with the inner side mold are used, the ironing mold is so dimensioned that a clearance between an external surface of the inner side mold and an internal surface of the ironing mold is narrower than a thickness of the outer peripheral wall of the bottomed cylindrical restriction component, a step part, which is recessed to a radial direction outer side, is formed on a lower end inner surface of the cylindrical ironing mold, a bottom surface of the bottomed cylindrical restriction component is supported by a lower mold 42 and respective molds are so located between the inner side mold and the ironing mold as to sandwich the outer peripheral wall of the bottomed cylindrical restriction component, and the ironing mold is lowered downwards from an upper end of the outer peripheral wall, whereby a flange 2b, which projects to a radial direction outer side, is formed at a lower end of the outer peripheral wall.SELECTED DRAWING: Figure 6 |
