Laser hybrid welding method and system

Abstract

The invention discloses a laser hybrid welding method which comprises steps as follows: a laser with a first wavelength, which is used for increasing the absorptivity of a workpiece to be welded to a laser with a second wavelength, is transmitted; the laser with the second wavelength is transmitted; and the laser with the first wavelength and the laser with the second wavelength are synthesized into one laser beam, and simultaneously, the laser beam is focalized on the workpiece to be welded so as to weld the workpiece to be welded. Continuous laser of the laser with the first wavelength is used for illuminating the workpiece to be welded to achieve preheat, and simultaneously, pulse laser of the laser with the second wavelength is used for welding, so that the effect and the speed of high-efficiency laser welding can be achieved, the construction cost is lower, and the requirement for various aspects of heat dissipation, power consumption and the like can be reduced. Besides, the invention further provides a laser hybrid welding device adopting the laser hybrid welding method.

Description

technical field [0001] The invention relates to the field of laser beam processing, in particular to a laser hybrid welding method and system. Background technique [0002] Laser welding is a non-contact welding method, which has the advantages of no filler, small thermal deformation, beautiful appearance, high precision, fast speed, etc. It is suitable for many occasions, especially the precision welding of small areas, so it is widely used In aerospace, military, automobile manufacturing, electronics, semiconductors, furniture manufacturing, communication devices and other fields. [0003] At present, common laser welding equipment mainly includes a laser light source, which is projected onto a focusing lens through a collimation device to focus the laser light, and a welding head is set near the focus point to realize laser welding. [0004] In some industrial applications, although ordinary laser welding equipment can be used, extremely high power is required. For exam...

AI Technical Summary

Problems solved by technology

[0004] In some industrial applications, although ordinary laser welding equipment can be used, it requires extremely high power

For example, the welding of some motor cores requires a continuous laser beam of 2000W or more. The cost of the laser light source has a lot to do with the laser power. The higher the power, the more expensive the price

And due to the high power, higher requirements are put forward for laser related devices, processing environment, safety protection, etc., which limits the wide application of laser welding technology to a certain extent

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