Welding device for preventing welding hot cracking and deformation

Abstract

Provided is a welding device for preventing welding hot cracking and deformation. A workbench is provided with a fixing device used for positioning an aluminum alloy board. A welding device and a cooling device are arranged around the workbench. The welding device comprises a tungsten electrode argon arc welding machine, a welding gun and an argon gas bottle which are connected through pipelines; the cooling device comprises a spraying gun and a dry ice ejector which are connected through a pipeline; the fixing device comprises a layer board where the aluminum alloy board is placed; fixing blocks for positioning the aluminum alloy board are arranged around the layer board; a sliding rail is erected above the layer board and is parallel with a welding seam of the aluminum alloy board; a welding gun sliding block and a spraying gun sliding block are arranged on the sliding rail in a sliding mode; a baffle portion capable of sliding along the sliding rail is arranged between the welding gun sliding block and the spraying gun sliding block; the welding gun and the spraying gun are fixed on the welding gun sliding block and the spraying gun sliding block respectively; a muzzle of the welding gun and a muzzle of the spraying gun are aligned with the welding seam. Non-support welding of the aluminum alloy board is achieved, and stability of the welding structure is ensured.

Description

technical field [0001] The invention relates to a welding device for preventing welding hot crack and deformation. Background technique [0002] Aluminum alloy materials have the characteristics of light weight, high specific strength, and easy processing, and are widely used in ships, aerospace and other fields. However, in the welding process of aluminum alloy materials, there are always a series of problems such as pores, deformation, cracking and so on. In particular, welding hot cracks and welding residual deformation have become common problems in the welding process of aluminum alloy materials, which seriously affect the strength, stiffness and working stability of welded components, thus limiting the application of aluminum alloy welded structures. In order to solve the above problems, the current welding impact rolling method is commonly used to control welding thermal cracks, that is, to use mechanical force to directly contact the surface of the test piece to pre...

AI Technical Summary

Problems solved by technology

However, in the welding process of aluminum alloy materials, there are always a series of problems such as porosity, deformation, cracking, etc.

In particular, welding hot cracks and welding residual deformation have become common problems in the welding process of aluminum alloy materials, which seriously affect the strength, stiffness and working stability of welded components, thus limiting the application of aluminum alloy welded structures

In order to solve the above problems, the current welding impact rolling method is commonly used to control welding thermal cracks, that is, to use mechanical force to directly contact the surface of the test piece to prevent the occurrence of thermal cracks, but the magnitude of the impact force is difficult to quantify, and Higher requirements are placed on the support capacity of the bottom support of the specimen

If liquid nitrogen is used for quenching with welding to prevent thermal cracks, although quenching can be achieved theoretically, the temperature of liquid nitrogen is too low, and it is very easy to cause harm to the human body during welding, and related problems need to be solved urgently

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