| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a tube with an inner surface groove capable of stabilizing an orthogonal cross section to the axial direction of the tube in the tube axis direction, and a method and device for manufacturing the same. <P>SOLUTION: In this method of manufacturing this tube with an inner surface groove, a connection rod 34 for connecting a floating plug 23 used in a diameter-reducing process to a grooved plug 32 used in a grooving work process is formed with a rigid body formed of a single constituent material continuing along a tube axis direction; the connection rod 34 is formed with a floating plug mounting part 34f allowing the floating plug 23 to be mounted thereto and formed with the grooved plug mounting part allowing the grooved plug to be mounted thereto; the diameter-reducing process is performed using the floating plug 23 directly mounted to the floating plug mounting part 34f; and the grooving work process is performed using the grooved plug 32 directly mounted to the grooved plug mounting part 34g. <P>COPYRIGHT: (C)2012,JPO&INPIT |
