Optical fiber laser welding machine online monitoring system, application and optical fiber laser welding machine

Abstract

The invention discloses an optical fiber laser welding machine online monitoring system, application and an optical fiber laser welding machine. The system comprises an optical splitter, a detection light path and a photoelectric detector, the optical splitter is connected with a laser transmission optical fiber of the optical fiber laser welding machine or is arranged in a welding head light path, and is used for sampling output laser and inputting detection light obtained by sampling into a detection light path; the detection light path at least comprises a filter for selecting a detection wave band; the filter is used for selecting an optical signal of a Raman optical band; and the photoelectric detector is connected with the output of the detection light path and is used for detecting the optical power of the detection wave band output by the detection light path. The system is applied to online monitoring of the high-power continuous laser welding machine, optical power signals of Raman optical bands are monitored in real time, full-band output spectrum analysis is replaced, and laser output quality can be accurately judged while real-time response and online monitoring are achieved, so that the working state of the laser welding machine is judged.

Description

technical field [0001] The invention belongs to the field of laser application, and more particularly, relates to an on-line monitoring system and application of a fiber laser welding machine and a fiber laser welding machine. Background technique [0002] The fiber laser welding machine uses the fiber laser as the laser source, and emits a high-power light spot through the focusing lens group, which is irradiated on the processing material to realize welding. Fiber laser welding machine has the advantages of small size, compact structure, high reliability, good beam quality, large penetration and small deformation, and has broad industrial application prospects. [0003] The welding effect of the fiber laser welding machine is determined by the output spot quality of the fiber laser. The quality of the output spot of the fiber laser is unstable, including the decrease of the spot brightness and the periodic change of the energy during the baking process. The output stabil...

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Problems solved by technology

[0006] In view of the above defects or improvement needs of the prior art, the present invention provides an online monitoring system and application of an optical fiber laser welding machine and an optical fiber laser welding machine. The purpose is to monitor the output in real time by sampling the output laser The power change of the laser Raman light band can judge the

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