Joining member, press molding die, joining method, and manufacturing method of joining member

Abstract

Provided is a joining technology that achieves excellent surface quality without causing quality defects such as cracks. A joining member is formed by joining a first member having a protrusion and a second member having a hole overlapping each other in the thickness direction, the protrusion having a length longer than the hole before joining, the protrusion including: a convex bent portion having a width narrower than the hole, connected to another part of the first member, extending and bent toward the second member; a concave bent portion having a width narrower than the hole, connected to the convex bent portion, extending and bent in the opposite direction from the convex bent portion, and inserted into the hole; and a crimping portion that connects to the concave bent portion, extends, has a tapered shape that is widest at its tip and wider than the hole, and crimps to expand the hole.

Images