A device for all-round direct observation of the shape of small holes in deep penetration welding of metal materials

Abstract

The invention provides a metal material penetration fusion welding small hole morphology all-dimensional direct observation device. The device comprises a welding head, a composite test piece locatedbelow the welding head and an image capturing component for observing small hole morphology; the welding head is a welding head capable of using lasers or electron beams; the composite test piece includes a metal test piece on the upper portion and a GG17 test piece on the lower portion, the top surface of the entire composite test piece, that is, the top surface of the metal test piece is a plane, the bottom surface of the metal test piece and the top surface of the GG17 test piece are both smooth joint faces, and an n-degree angle is formed between the joint faces of the metal test piece andthe GG17 test piece and the top surface of the composite test piece, and n is larger than 0 and smaller than 90 degrees; and the image capturing component includes a video camera. The device can be used for metal material penetration fusion welding small hole morphology all-dimensional direct observation, no observation dead angle exists, and more accurate small hole shapes can be provided for study of small hole behaviors and an energy absorption mechanism in small holes.

Description

technical field [0001] The invention relates to the field of deep penetration welding, in particular to a device for directly observing the morphology of small holes in deep penetration welding of metal materials in all directions. Background technique [0002] As a high-quality and efficient welding method, deep penetration welding (including laser, electron beam, etc.) has the advantages of fast welding speed, large weld depth-to-width ratio, small heat-affected zone and welding deformation, and is widely used in steel, nuclear power, aerospace, etc. It has been more and more widely used in major military and civil projects such as railway transportation, automobile, electronic industry, etc., especially in the lightweight of transportation vehicles (welding of thin-walled components and lightweight materials such as aluminum and magnesium alloys). play an increasingly important role. [0003] (1) Current status of small hole observation technology [0004] The essential...

AI Technical Summary

Problems solved by technology

However, this method has a significant disadvantage: the metal film layer used for welding is a loose structure, which is very different from the actual situation of the dense workpiece used for welding, because the loose multi-layer aluminum film has a deep impact on the laser. The influence of heat transfer, mass transfer and laser energy absorption and transmission process in the fusion welding process is very different from the dense aluminum alloy materials used in engineering practice. The actual situation of the material is very different

[0011] To sum up, in the prior art, there is neither a device and method that can directly observe the shape of the small hole in the deep penetration welding of the metal material, nor a method that can directly observe the shape of the small hole in the deep penetration welding of the metal material. There is no device and method for direct observation of plasma distribution in all directions, and there is also no composite test piece that can be used for direct observation of small holes in deep penetration welding of metal materials.

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