Manufacturing method for fastening structure

Abstract

In a casting step, a first member is cast by die casting. In the driving step after the casting step, a self-piercing rivet is driven into, from a second member side, an overlapping part in which the second member overlaps the first member, while heat from casting remains in the first member. As a result, the self-piercing rivet is driven into the first member in a state that the ductility is higher than that at the normal temperature. Therefore, the first member is less likely to crack during the driving step.

What is claimed is: 
     
         1 . A manufacturing method for a fastening structure, the manufacturing method comprising:
 a casting step for casting a first member by die casting; and   a driving step for driving a self-piercing rivet into, from a second member side, an overlapping part in which the second member overlaps the first member, while heat from casting remains in the first member after the casting step.   
     
     
         2 . The manufacturing method according to  claim 1 , wherein a part of the first member overlapped by the second member is heated from a support member that supports the first member from a side opposite to a side on which the self-piercing rivet is to be driven into the overlapping part in the driving step.