Hybrid laser machining method and hybrid laser torch used therein

Abstract

The invention discloses a hybrid laser processing method and a hybrid laser head used in the method. Even for metal materials with high reflectivity, it is possible to weld with sufficient penetration depth and penetration width, and at a higher speed. The different first and second lasers from the two laser systems A and B are superimposed to form a mixed laser (6) and focused, if the second laser (5) and the first laser ( 3) The effective light spot sizes on the processed object (7) are respectively set to D2 and D1, so that D2 is smaller than D1, so that the processed object 7 is irradiated for processing, so as to achieve the above purpose.

Description

technical field [0001] The present invention relates to the superimposition of two different lasers from two laser systems such as the first laser generated by a solid laser medium such as YAG and the second laser generated by a semiconductor laser (hereinafter referred to as LD) as a hybrid laser to irradiate the object to be processed for processing A hybrid laser processing method and a hybrid laser head used in the method. Background technique [0002] In order to use laser for welding and other processing, there are several devices as follows. One is to focus one laser beam to make it have multiple focus positions on the optical axis corresponding to the welding width and welding depth, which can meet the specified welding penetration. depth (for example, refer to Patent Document 1); the second is to superimpose two kinds of YAG laser irradiation, so that even metal materials with high reflectivity and high heat dissipation rate can obtain sufficient penetration cross-s...

AI Technical Summary

Problems solved by technology

In the technique described in Patent Document 4, although the particles reaching the focusing lens are cut off by an air knife, even if this satisfies the requirements, there is still the problem of sputtered particles being ejected into the atmosphere around the head, and the inside of the head is easily damaged. Contamination by sputtered particles

Even if this can be solved by spraying inert gas from the inside of the head, the problem of spraying the surrounding air to the welded part has not been solved.

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