| 摘要 |
PROBLEM TO BE SOLVED: To provide a laser joining structure capable of securing welding quality, without requiring projections when welding an outer cylinder and inner members by a laser beam; and a laser joining method.SOLUTION: Laser joining structure 11 includes an outer metallic cylinder 12 and a metallic reinforcing member 14 disposed within the outer cylinder 12. The reinforcing member 14 has a plurality of flange portions 14D and 14E, and a connecting wall portion 14B which are disposed along the inner shape of the outer cylinder 12, and a plurality of the flange portions 14D and 14E and the connecting wall portion 14B are disposed in contact or in close proximity with the outer cylinder 12. By irradiating a laser beam to a mating part between the outer cylinder 12, the flange portions 14D and 14E, and the connecting wall portion 14B from the outside of the outer cylinder 12, the outer cylinder 12, the flange portions 14D and 14E, and the connecting wall portion 14B are melted to be provided a laser welding unit 22 in which a cylindrical nugget is formed. |
