| 摘要 |
<p>Provided are a tube the endurance of which is improved and on the outer periphery surface or the inner periphery surface of which fine asperities are formed at an almost fixed interval in a simple process, and its manufacturing method. The tube is a metal tube which has a hollow metal tube body, the thickness of which is uniform from 20 to 50μm, and which is worked by spinning in which a metal original body which is formed of metal and which is in a circular form is rotated about the central axis line of the metal original body with a rotation support body, a top arranged on the outer periphery of the metal original body is pushed, and thus the metal original body is plastically worked. Fine asperities are formed on the outer periphery surface or the inner periphery surface of the metal tube at an almost fixed interval. Both ends of the metal original body subjected to spinning are cut, and thus a tube (11) is formed.</p> |
