Underwater local dry laser welding monitoring experiment platform based on multiple sensing signals

Abstract

The invention belongs to the related technical field of underwater laser welding, and discloses an underwater local dry laser welding monitoring experiment platform based on multiple sensing signals, and the experiment platform comprises a water tank support assembly, a workpiece clamping and moving assembly, a welding module, a monitoring assembly, a drainage assembly and a water tank; the water tank support assembly is of a frame structure with an upper layer and a lower layer and comprises a water tank installation protection support and a water tank connection supporting frame which are arranged from top to bottom and connected, the water tank is arranged on the water tank installation protection support, and the monitoring assembly is arranged on the water tank connection supporting frame. The workpiece clamping and moving assembly is arranged in the water tank, the drainage assembly is connected to the welding module, and the welding module is arranged adjacent to the workpiece clamping and moving assembly. The integration level is improved, the structure is simple, and the applicability is high.

Description

technical field [0001] The invention belongs to the technical field related to underwater laser welding, and more specifically relates to an underwater partial dry laser welding monitoring experiment platform based on multi-sensing signals. Background technique [0002] Underwater welding techniques include wet welding, partial dry welding, and dry welding. Underwater local dry welding blows protective gas through the drainage device to form a mobile local drying chamber, which protects the welding process and can take into account welding quality and cost on the basis of ensuring a simple and flexible structure. It is favored by more and more universities and enterprises. , The research institute attaches great importance to it. [0003] However, underwater welding needs to face a complex and harsh working environment, and submersible welders are required to perform welding repair work at a water depth of hundreds of meters. There are low visibility (unable to judge the we...

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Problems solved by technology

[0005] At present, the existing welding experiment platform is not suitable for the online monitoring experiment research of underwater partial dry laser welding, and the main problems are as follows: (1) A large amount of dark brown smoke and oxide particles will be produced during the underwater welding process, which will dissolve in the water , so that the visibility is reduced, which seriously affects the follow-up experiment and the acquisition of welding process signals. In order to ensure the experiment, the experimental water needs to be replaced frequently, and the replacement process is cumbersome and time-consuming; (2) The drainage effect of the underwater local dry welding drainage device is particularly Important, it is the most clear and intuitive method to determine the drainage effect by taking photos of the drainage situation from the bottom before welding, but there is not enough space at the bottom of the water tank, and the sensor is difficult to arrange; (3) Underwater local dry laser welding In order to ensure a good drainage effect, the drainage The cover is only a few millimeters away from the workpiece, and the position accuracy of the side-axis vision sensor on the outside of the water tank is very high, which takes up a lot of space and makes it difficult to adjust the sensor arrangement

(4) Affected by the fluctuation of water and the refraction of the rising and breaking process of bubbles, the optical signal of the local dry laser welding process and the signal intensity of the structured light visual image collected are low and seriously distorted, and effective information cannot be obtained for analysis and research

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