Bottomed cylindrical member, bottomed thin-walled cylindrical member, bottom disk-shaped bottomed cylindrical member, bottom disk-shaped bottomed thin-walled cylindrical member manufacturing method, and bottomed cylindrical member-bottomed thin-walled cylinder -Shaped member, bottom disk-shaped bottomed elongated cylindrical member and bottom disk-shaped bottomed thin-walled elongated cylindrical member

摘要

PROBLEM TO BE SOLVED: To provide a method of manufacturing a cylindrical member with bottom, an extended cylindrical member with disk-like bottom, a thin-wall extended member with bottom, and a thin-wall extended cylindrical member with disk-like bottom that can easily form their shapes without excessive pressurizing force and improve the service life of a mold, and to provide a cylindrical member with bottom, an extended cylindrical member with disk-like bottom, a thin-wall extended cylindrical member with bottom, and a thin-wall extended cylindrical member with disk-like bottom.SOLUTION: This method for manufacturing includes: a step wherein a solid columnar material 1 is forged to form a cup-like large-diameter section 2b of which diameter is made large toward an end part on one end side thereof and an intermediate member 2 where the cup-like large-diameter section and a columnar section 2a formed integrally on the small-diameter side of the cup-like large-diameter section are provided; and a step wherein the cup-like large-diameter section of the intermediate member is subject to ironing to form a cylindrical section 3b of which cup-like large-diameter section is made cylindrical and a cylindrical member with bottom where a cylindrical section and a columnar section 3a formed integrally on one end side of the cylindrical section are provided.