Method for manufacturing joined body
A method for manufacturing a joined body including two plate-like portions, the method including forming a joint part that comprises at least a portion of each of the two plate-like portions and joins the two plate-like portions; and irradiating the joint part with a beam, thereby to perform laser welding. The joint part includes at least one folded part, the at least one folded part is a bent part that is bent so as to be folded back in one of the two plate-like portions. First and second bases are formed at both ends of the bent part to face each other such that at least a portion of the other of the two plate-like portions is arranged between the first and second bases, the other of the two plate-like portions including no bent part.
1 . A method for manufacturing a joined body comprising a first member, a second member, and two plate-like portions that are made of metal comprising aluminum as a main component, the two plate-like portions being plate-shaped portions, with the first member comprising one of the two plate-like portions, and the second member comprising an other of the two plate-like portions, the method comprising:
forming a joint part that comprises at least a portion of each of the two plate-like portions and joins the two plate-like portions; and
irradiating the joint part with a beam, thereby to perform laser welding,
wherein the joint part comprises at least one folded part, the at least one folded part being defined as a bent part that is bent so as to be folded back in one of the two plate-like portions;
wherein two bases facing each other along a facing direction are formed at both ends of the bent part to face each other such that at least a portion of the other of the two plate-like portions is arranged between the two bases, the other of the two plate-like portions not including the bent part;
wherein the at least one folded part comprises two folded parts formed on a portion included in the joint part of one of the two plate-like portions, and also the at least one folded part comprises one folded part formed on a portion included in the joint part of the other of the two plate-like portions,
wherein the joint part is provided so as to protrude from one of the two plate-like portions,
wherein the joined body further comprises a main body part adjacent to the joint part,
wherein a flow path for a fluid is formed between the first member and the second member,
wherein the beam irradiates the joint part along the facing direction from a side where a protruding part of the joint part is situated,
wherein, through the laser welding, each of the two bases in each of the at least one folded part is welded to a portion of the other of the two plate-like portions adjacent to the two bases, and a melted portion formed by the beam does not reach an opposite side of a portion of the joint part where the beam irradiates,
wherein, in the laser welding, the beam irradiates a portion of the joint part closer to the main body part than a center in a width direction of the joint part, and
wherein the width direction is defined as a direction orthogonal to an extending direction of the joint part and to the facing direction.