| 摘要 |
PROBLEM TO BE SOLVED: To provide a joining method using a self-piercing rivet, which can prevent cracking of a die and overload on a rivet driving-in device by reducing the rivet driving-in load. SOLUTION: Three plates, a top plate W1, a middle plate W2 and a bottom plate W3, are piled up together. Those plates W1, W2 and W3 are pressurized and restricted with the die 1 and a pad 2 and then fastened and joined to the top plate W1 with a punch 6 by driving-in the self-piercing rivet 3. The die 1 has a concave pressurize-restricting face 4 with a projection at the center, and the driving-in operation of the self-piercing rivet 3 is completed before a swelled portion P on the bottom plate W3 side comes to contact to the deepest part of the pressurize-restricting face 4. COPYRIGHT: (C)2009,JPO&INPIT |
