JOINING DEVICE AND JOINING METHOD

摘要

A joining device for connecting a metal member and a resign member with a metal fastener including a penetrating tip comprises: a cylindrical nosepiece; a high frequency electromagnetic induction coil around the nosepiece; an electrode punch for pressing the fastener into the resign member; a electronic chopper for producing a high frequency current; a high frequency power supply for supplying an induction current to the induction coil; a welding power supply for supplying a welding current between the electrode punch and the metal member; a contact detector for sensing when the fastener tip touches the metal member; and a switching unit for automatically switching from the induction current to the welding current when the contact detector senses that the tip has contacted the metal member.

主权项

1. A joining device for joining a metal member and a resin member using a metal fastener that penetrates the resin member and fuses to the metal member, the metal fastener including a tip, and the joining device comprises:
a cylindrical nose piece operable for up and down movement; a high-frequency induction heating coil disposed around the nose piece; an electrode punch operable for up and down movement inside of the nose piece and for conducting a welding current; a high frequency electronic chopper device operable for converting an input power into one of a welding current and an induction heating current; a high-frequency induction output device operable for receiving the induction current from the chopper device, and for supplying the induction current to the high-frequency induction heating coil; a resistance welding output device operable for receiving welding current from the chopper device and supplying welding current between the electrode punch and the metal member; a contact sensing device operable for sensing when the tip portion of the fastener has penetrated the resin member and contacted the metal member; and a switching device operable for switching between connecting the chopper device to one of either the high-frequency induction output device or the resistance welding output device based on an output signal from the contact sensing device.