Blue laser-infrared laser hybrid welding device and method based on powder

The invention discloses a blue laser-infrared laser hybrid welding device and method based on powder. The laser system comprises a CCD light path reflection module connected with the beam combining module; the CCD monitor is connected with the CCD light path reflection module; the focusing module is connected with the beam combining module; the coaxial powder feeding nozzle is connected with the focusing module; the blue laser collimation module is in fiber connection with the blue laser; the infrared laser collimation module is in optical fiber connection with the infrared laser; the infrared laser collimation module is in light path connection with the beam combining module through the infrared laser reflection module; the defect that a welding material is low in single laser wavelength absorptivity is overcome by adopting a blue laser-infrared laser hybrid welding technology, the welding seam can be automatically identified, tracked, controlled and monitored by adopting a four-axis numerical control machin