| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of bending machining metal tubes with narrow diameter with which any kinds of bending works can be performed accurately by one bender even if the straight length of the end parts of metal tubes are short. SOLUTION: When a machining method of bending metal tubes is comprised of the process such as chucking an end of a metal tube with a narrow diameter, setting a machining direction, and machining to bend tubes in a direction from the tip of the other end to the chucked end, the method features in performing one or more process of bending on an end of a metal tube in advance, chucking parts where machining is performed to bend, keeping as it is, and machining is performed to bend from the tip of the other end to an end where machining has been done already.
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