| 摘要 |
PROBLEM TO BE SOLVED: To provide a metallic component which has high strength, and is inexpensively manufactured.SOLUTION: A metallic component 2 is equipped with a bottomed cylinder 3 opening on one end and blocked on the other side, and a protrusion 4 formed on a side surface of the bottomed cylinder 3. The protrusion 4 is positioned on the one side than a bottom portion 3B of the bottomed cylinder 3. The bottomed cylinder 3 and the protrusion 4 are not joined by welding and the like, but are integrated. The metallic component 2 is formed from non-ferrous metal (aluminium alloy) in addition to iron, steel, steel alloy. The bottomed cylinder 3 is linearly formed, and an outer diameter R1 and an inner diameter R2 are generally fixed in a length direction. |
