| 摘要 |
PROBLEM TO BE SOLVED: To highly precisely work the housing of an O ring at the inner peripheral side of a tube without performing cutting work.SOLUTION: The housing of an O ring is formed by forming with a roller die 6 at the inner periphery of a diameter-reduced part 3 of a separator tube 1 while the end face and the outer periphery of the diameter-reduced part 3 are restrained by an outer die 7, so the housing 2 of high precision having no roll over on a wall surface can be formed at the inner periphery of the diameter-reduced part 3 without performing cutting work. |
