| 摘要 |
PROBLEM TO BE SOLVED: To ensure a sealed condition in a welded part of aluminum members without requesting any large device or precise control. SOLUTION: Pin holes at the welded part M are eliminated by striking hard powder and granular material s against the annular welded part M of an opening end of an aluminum cylindrical body (1) with an aluminum sealing member (2) from the outer circumferential side to deform the welded part M. |
