| 摘要 |
<p>A metal member (3) to be bonded is bonded with an adhesive (6) to have a strength higher than the basic material strength of the metal member (3) to be bonded. A metal insertion coupling has a socket portion (4) in which an insertion hole (2a) for inserting the end portion of the metal member (3) is formed. The socket portion (4) has a tapered outer surface extending from the opening end to the back side. The tensile strength of the socket portion (4) at the deepest position of the center line of the insertion hole is equal to or higher than the tensile strength of the metal member (3) in the direction of the center line. In the metal insertion coupling, insertion hole (2a) is formed to have a larger width as compared with the end portion of the metal member (3) in the range of 0.2 mm - 0.6 mm. The metal member (3) to be bonded is bonded under a state where the end portion of the metal member (3) is pressed into the insertion hole (2a) and an adhesive exists densely between the end portion of the metal member (3) and the inner surface of the insertion hole (2a), by performing quenching or cold working to the end portion of the metal member (3).</p> |
