Patent ID: 6545247
Filing Date: 2003-04-08
Classification: B23K

Abstract:
A laser welding apparatus comprising a laser welding head and a laser welding head position-controlling apparatus,the laser welding head including a laser irradiating body with an inert gas nozzle to blow off an inert gas for welding parts of members to be welded and at least one shielding gas nozzle, at the outside of the inert gas nozzle, to blow off a shielding gas for the surrounding area of the welding parts, and plural semiconductor lasers to oscillate plural linear laser beams for measuring the welding state of the members to be welded, wherein the forefront of the shielding gas nozzle is formed in parallel to the forefront of the inert gas nozzle in a blowing direction, the laser welding head position-controlling apparatus including an imaging apparatus with a band-pass filter therein to pass through only the reflected linear laser beams to take in, as an image, the measured welding state by the reflected linear laser beams, and an image processor to process the image of the measured welding state.