Core metal for resin welding, composite member and method of manufacturing the same

摘要

The core metal for resin welding improves bonding strength between an outer peripheral resin member and the core metal. The outer peripheral resin member 30 is welded to the peripheral surface 21 of the core metal 20 by fitting the core metal into a fitting hole 31 of the outer peripheral resin member 30, preparing the outer peripheral resin member 30 providing the fitting hole 31 with a smooth internal wall surface; preparing the core metal 20 wherein streaky protrusions 26 and smooth portions 25 are provided; allowing the top parts of the protrusions 26 to contact, and the smooth portions of the core metal 20 to face the smooth internal wall surface; and induction heating to weld the outer peripheral resin member 30 to the protrusions 26 and the smooth portions 25.

主权项

1. A method of manufacturing a composite member by fitting a core metal into a fitting hole of an outer peripheral resin member and subjecting them to induction heating, thereby welding the outer peripheral resin member to the peripheral surface of the core metal, comprising:
preparing the core metal wherein a plurality of streaky protrusions formed in a direction crossing the circumferential direction and arranged in the circumferential direction and smooth portions placed on both ends of the streaky protrusions are provided on the peripheral surface; preparing the outer peripheral resin member wherein the fitting hole is provided with a smooth internal wall surface; allowing the top parts of the plurality of protrusions to contact, and the smooth portions of the core metal to face oppositely, the smooth internal wall surface by fitting the fitting hole of the outer peripheral resin member to the peripheral surface of the core metal; and then performing induction heating to weld the outer peripheral resin member to the plurality of streaky protrusions and the smooth portions.