| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hollow component which, despite being formed from thin sheets, does not raise problems in a strength or operating environment manner, and which is advantageous in terms of cost as well; and to provide a manufacturing method thereof. <P>SOLUTION: A first collar portion C1 is formed by flow drilling one plate 20 of a pair of plates 20 and 21 having a gap therebetween. A second collar portion C2 is formed when the other plate 21 is flow drilled, and a cylindrical connection body C is formed by fusing the inner end portion of the second collar portion C2 and the inner end portion of the first collar portion C1, to reinforce the flat plates. <P>COPYRIGHT: (C)2013,JPO&INPIT |
