| 摘要 |
<p>Disclosed is a production method by which a blade can be easily shaped, cut, and welded to form a metallic flexible tube. Specifically, a blade (5) is arranged on the outer peripheral side of a bellows (4). A locking ring (6) is arranged between the bellows (4) and the blade (5). The locking ring (6) is locked at a valley portion (3a) on an end portion of the bellows (4). A pressing ring (7) is arranged on the outer peripheral side of an end of the blade (5). The end of the blade (5) is set to have a length projecting m than the locking ring (6) in the central axis direction. The pressing ring (7) is supported by a support tool (11). An end of the bellows (4) is pressed by a pressing tool (12) in the central axis direction to crush the end of the bellows (4). At the same time, an end of the blade (5) is shaped to follow the outer shape of the locking ring (6). While the end of the bellows (4) is pressed, the end of the blade (5) is cut by fusion, and a surplus portion is removed. At the same time, the blade (5) is welded with the locking ring (6) and the pressing ring (7).</p> |
