Active type integrating device of micro-pore monitoring and seam tracking in short-wavelength laser welding

Abstract

The invention discloses an active type integrating device of micro-pore monitoring and seam tracking in short-wavelength laser welding, and the device is used for realizing that the seam tracking before welding and the online monitoring of micro-pores in a welding process are synchronously carried out. The active type integrating device disclosed by the invention comprises a laser head, an auxiliary light source irradiation device and a coaxial optical lens assembly, wherein the laser head is located above a workpiece; the auxiliary light source irradiation device is located at one side of the laser head; laser beams transmitted by an optical fiber sequentially pass through a lens A, a spectroscope and a lens B which are arranged in the laser head and irradiate on the workpiece; and the coaxial optical lens assembly is arranged at one side of the laser head, is coaxial with the laser head, and is used for observing the welding state of the workpiece. By using an LED (Light-Emitting Diode) point light source mounted on the laser head to irradiate at a high angle, the active type integrating device disclosed by the invention can be used for clearly shooting a welded micro-pore continuous image and capturing and tracking a seam in an area to be welded by means of coaxially shooting the area to be welded. Therefore, the seam tracking and online monitoring of welded micro-pores are carried out synchronously. Furthermore, the active type integrating device has the advantages of low cost, simple structure, convenience for installation and easiness in operation.

Description

technical field [0001] The invention relates to an integrated device for coaxial visual monitoring of welding small holes and pre-weld seam tracking in the process of short-wavelength laser welding, specifically an integrated device that can realize online monitoring of small holes and seam tracking in the process of short-wavelength laser welding An integrated device that satisfies. Background technique [0002] With the rapid development of my country's automobile industry, laser welding technology has also been fully reflected, but due to the relatively complicated laser welding process, the welding quality cannot be guaranteed. The research found that the depth of the small hole in the laser deep penetration welding process has a certain relationship with the depth of the weld. Therefore, the monitoring of the welding quality by monitoring the relevant information of the small hole in the laser welding process has attracted the attention of many scholars. [0003] At pr...

AI Technical Summary

Problems solved by technology

In the welding head produced by foreign precitec company, three sensors of sound, light and electricity are installed on the laser head to monitor the quality of laser welding, which is costly and complicated to install; prometec company uses passive coaxial monitoring method to monitor the laser welding molten pool image, And extract the image information of the welding pool to judge whether the welding quality is good or bad, but the above methods or products are carried out separately for the molten pool monitoring and welding seam tracking, which makes the required equipment complicated, inconvenient to install, and high in cost

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