Patent ID: 9669488
Date: 2017-06-06
CPC Classifications: B23K

Claim:
1. A current diffusion bonding apparatus that bonds a plurality of members to be bonded, the bonding surfaces of which are abutted to each other, by the passage of a current through the members to be bonded, comprising: a plurality of electrodes which sandwich the plurality of the members to be bonded and which are electrically conductible with the plurality of the members to be bonded; a power supply unit that supplies a current to the plurality of electrodes; a first pressurizing unit which applies a pressure to the bonding surfaces while restricting a displacement in a direction of expansion relative to a sandwiching direction of the plurality of the members to be bonded, which are sandwiched by the plurality of the electrodes; a second pressurizing unit which applies a pressure based on an elastic force of an elastic member that elastically deforms according to a displacement in the direction of expansion relative to the sandwiching direction of the plurality of the members to be bonded, which are sandwiched by the plurality of the electrodes, to the bonding surfaces through the plurality of the electrodes; a temperature sensor which detects a temperature in a vicinity of the bonding surfaces; and a pressurization selecting unit which selects one of the first pressurizing unit and the second pressurizing unit to apply a pressure to the bonding surfaces based on the temperature detected by the temperature sensor.