| 摘要 |
PURPOSE:To perform a good welding by controlling the relative position and relative moving speed for the beam source of the body to be welded, by detecting the variations in the position and width of the gap of a butt part and by performing the control based on the detection result thereof. CONSTITUTION:A beam spot 7 is formed with the laser light 5 emitted from a laser oscillator 4 being focused on the butt part 6 of two members 1 and 2. The light led into the gap of the butt part 6 is led via an adaptor 18 from the light source 17, outgone to the upper part by transmitting the gap and photodetected by an optical sensor 20. The optical sensor 20 is provided at the front of the part where the beam spot 7 is formed and the light information detected by the optical sensor 20 is converted into an electrical signal by a reader 21 and given to a controller 23. The controller 23 decides the laser projection conditions, the positional coordinate of a mounting base 3 and the feeding speed of a welding wire 14 to control a laser control device 10, motor driving device 13 and wire feeding control device 16. |
