Aluminum alloy magazine welding deformation control device and method

Abstract

The invention provides an aluminum alloy magazine welding deformation control device and method. The aluminum alloy magazine welding deformation control device comprises an outer mold for positioningthe outer contour of a magazine, a core mold for positioning the inner contour of the magazine and a turnover mechanism for turning over the magazine. The control method include the steps that left and right molds are pushed relative to each other until a left half and a right half of the magazine have a welding seam spacing of 0.07-0.12mm; pushing and pressing mechanisms are pushed relative to each other, and the left half and the right half of the magazine are subjected to pre-deformation; when the temperature is detected greater than 80 DEG C during welding, normal temperature high-purity argon gas is immediately introduced into an argon gas passage, and the introduction of the argon gas is stopped until a temperature sensor detects that the temperature is lower than 80 DEG C; and afterturning over, a welding seam on the lower surface of magazine is welded, and vibrating ageing treatment is performed on the magazine after the welding is completed. The deformation amount in the direction, perpendicular to the welding seam, on the plane on which the aluminum alloy magazine welding seam is located can be controlled to be 0.02-0.05mm / 50mm, the deformation amount in the direction, parallel to the welding seam, on the plane on which the welding seam is located is controlled to be 0.04-0.08mm / 50mm, and the welded part cannot be oxidized and cannot absorb moisture.

Description

technical field [0001] The invention relates to an aluminum alloy magazine welding deformation control device and control method. Background technique [0002] Aluminum alloy has low density, high plasticity, excellent electrical conductivity and thermal conductivity, and its surface can form a dense oxide film protective layer, which has good corrosion resistance in the atmosphere. After the aluminum alloy is strengthened by hot extrusion, welding and heat treatment, the aluminum alloy has good comprehensive mechanical properties and seawater corrosion resistance, and can be used to manufacture the main non-heat-resistant load-bearing components in individual light weapons equipment, such as manufacturing Small arms components such as receivers, handles and magazines. [0003] Aluminum alloy magazine components are usually stamped and welded from aluminum sheets. There are several problems in the welding process: one is that the aluminum alloy has strong chemical activity ...

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Problems solved by technology

[0003] Aluminum alloy magazine components are usually stamped and welded from aluminum sheets. There are several problems in the welding process: one is that the aluminum alloy has strong chemical activity and thermal conductivity, and the surface is very easy to form an oxide film. The second is that the aluminum alloy welding process is prone to moisture absorption, and air hole defects are formed at the weld; the third is that the aluminum alloy material has a large linear expansion coefficient, and it is easy to warp after welding. , due to the different internal residual stress states of the base metal on both sides of the weld, it is very easy to cause irregular deformation or even scrapping of the produced aluminum alloy magazine components

[0005] As mentioned earlier, although the existing welding fixtures and welding methods can control the welding deformation of aluminum alloy plates to a certain extent, they are not suitable for controlling the welding deformation of aluminum alloy magazines, especially for controlling the deformation of aluminum alloy magazines. The welding deformation of the new generation of gun magazines is extremely strict, and it is a major technical problem in this field to accurately control the welding deformation of aluminum alloy magazines to the level of 0.1 / 10mm

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