To provide a member joining device capable of preventing joining failure.
This member joining device is constituted so that a laser beam transmittable first member 50 and a laser beam absorbent second member 60 are superposed one upon another to be irradiated with a laser beam 21 on the side of the first member 50 and the laser beam 21 passed through the first member 50 is absorbed by the second member 60 to heat the second member 60 to join two members 50 and 60 at a welding part 70. The member joining device is equipped with a placing stand 10 on which the first and second members 50 and 60 superposed one upon another are placed, a laser beam irradiator 20 for irradiating two members 50 and 60 with the laser beam 21, a fixing cylinder 30 for pressing two members 50 and 60 placed on the placing stand 10 to fix them and a control device 40 for controlling the laser beam irradiator 20. The control device 40 controls the laser beam irradiator 20 so as to change the output of the laser beam 21, the scanning speed of the laser beam 21, the spot diameter of the laser beam 21 and the like based on a detected surface pressure by a pressure sensor 15 and changes the energy of the emitted laser beam 21 so as to ensure the desired joining strength of the first and second members 50 and 60.
SAKAGAMI YUJI
MUTO YOSHIKI
Hitoshi Maeda
Koichiro Okura
Miki Sato