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The automated collaborative robot welding of bulldozer beams and buckets uses two inverted robots, two sets of fixtures and external walking axes, and adopts dual-machine dual-station operation according to the on-site environment to fully ensure the beat and welding quality, and realize the automated welding of bulldozer beams and buckets. The servo positioner can ensure that the weld is in a stable state as much as possible, which is conducive to the formation of the weld.