Laser welding device

Abstract

The invention provides a laser welding device. The laser welding device comprises a laser welding system and a gas protection system. The gas protection system comprises a adapter, a gas pipe, a gas source, a flexibly bent plastic pipe and a nozzle, wherein the adapter is connected to a welding head of the laser welding system; the adapter is connected with one end of the gas pipe; the gas sourceis connected with the other end of the gas pipe; one end of the flexibly bent plastic pipe communicates with one end of the gas pipe; the nozzle is arranged at the other end of the flexibly bent plastic pipe; and a adiabatic transition tube is arranged at the other end of the flexibly bent plastic pipe, and the nozzle is arranged at the other end of the flexibly bent plastic pipe through the adiabatic transition tube. Compared with the prior art, the laser welding device has the beneficial effects that inert gas space is formed nearby a laser action region, protection of follow-up gas of a complex path is realized, plasma cloud above a welding region is effectively blown down, the coupling effect of a laser beam and a metallic work is improved, and a weld joint still in a high temperaturestate is effectively protected.

Description

technical field [0001] The invention relates to the field of laser welding, in particular to a laser welding device. Background technique [0002] As a precise, efficient and fast welding method, laser welding has been more and more widely used in the aerospace field. Laser welding can be simply summarized as such a process: first, the focused laser beam is irradiated on the surface of the metal workpiece, and the metal workpiece material melts after absorbing the laser light. After the metal workpiece and the laser beam move relatively, the melted metal workpiece solidifies and crystallizes after the laser beam leaves. , forming a weld. Laser welding is divided into two modes: heat conduction welding and deep penetration welding. Among them, deep penetration welding has material melting, gasification and plasmaization, and has a small hole effect, and the weld depth-to-width ratio is large. It is the main application of laser welding industry. method. [0003] In the abo...

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Problems solved by technology

[0005] Aiming at the defects in the prior art, the purpose of the present invention is to provide a method to solve the problem of softening or even melting of the flexible and bendable plastic pipe caused by overheating of the nozzle of the gas protection system under long-term high-power laser welding state, and to improve the performance of the gas protection system. Laser welding device with excellent high temperature resistance stability and reliability

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