Electronic beam welding method of sealing thin-wall aluminium alloy frame

A technology of electron beam welding and aluminum alloy frame, applied in the field of aluminum alloy welding, can solve the problems of difficult control of welding quality, difficult to improve product quality, large deformation of welding seam, etc., so as to shorten machining time, improve production efficiency, improve The effect of intergranular structure

Active Publication Date: 2012-06-20
ZHENGZHOU AIRCRAFT EQUIP +1
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Problems solved by technology

The deformation of the weld seam using argon arc welding is relatively large, and the welding quality is not e

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  • Electronic beam welding method of sealing thin-wall aluminium alloy frame
  • Electronic beam welding method of sealing thin-wall aluminium alloy frame
  • Electronic beam welding method of sealing thin-wall aluminium alloy frame

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[0014] Such as figure 1 , 2 3, the closed thin-walled aluminum alloy frame is composed of an upper opening cavity 1 made of aluminum alloy material, and a cover plate 2 that is fastened to the opening on the cavity 1; the cavity 1 and the cover plate The material of 2 is hard aluminum alloy 2A12, the thickness of the cover 2 is 3.5mm, the wall thickness of the two adjacent cavities 1 is 5mm, and the size of the largest cavity 1 is: 160 (length) × 80 (width) × 33 (height) ) Mm. It is required that the welding seam has no cracks, no unfused, less porosity, less deformation, and less decrease in tensile strength. Since the total length of the welding seam is long and the heat is relatively concentrated; and the machining allowance after the welding of the workpiece is required to be small, the welding of the workpiece adopts the electron beam welding technology with less deformation. However, due to the special structure of the thin-walled workpiece of the cavity 1, all welding i...

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Abstract

The invention relates to an electronic beam welding method of a sealing thin-wall aluminium alloy frame, which comprises the following steps that: a, before a cover board and the upper opening of a cavity are welded, a circular table is firstly added around the opening of the cavity, and the cover board is assembled in the circuit table in an interference fit way; b, during welding, welding parameters are adjusted, then, positioned welding of positioned welding points is carried out along the interval of 5-10mm of a welding seam, during the positioned welding, the mode of firstly temporarily welding shot welding seams and then temporarily welding long welding seams is taken as a principle; and c, during electronic beam welding, a circle of welding is carried out clockwise or anticlockwise along the welding seams from the positioned welding points of a short side, and scanning welding is added in the electronic beam welding parameters, the welding seams which are subject to butt welding are subject to secondary modified welding so as to reduce welding defects. The invention has the beneficial effects that the purposes of reducing welding deformation quantity and shortening following mechanical processing time are realized; and by carrying out modified welding to the welding area, the quality of the welding seams is improved, the intergranular structure of the heat influence area is improved, the skeleton strength of the sealing thin-wall aluminium alloy frame is ensured, and the production efficiency is greatly improved.

Description

technical field [0001] The invention relates to an aluminum alloy welding method, in particular to an electron beam welding method for a closed thin-walled aluminum alloy frame. Background technique [0002] 2A12 aluminum alloy (GB / T3191-1998) closed thin-walled frame structure has the characteristics of light specific gravity, large bearing weight, high overload strength and large torque resistance, and is mainly used for the load-bearing structure of the product. At present, argon arc welding is mostly used in the welding of the main load-bearing parts of the 2A12 aluminum alloy closed thin-walled frame structure during the manufacturing process. The deformation of the welding seam by argon arc welding is relatively large, and the welding quality is not easy to control, which makes subsequent processing difficult and product quality difficult to improve. Contents of the invention [0003] The purpose of the present invention is to provide an electron beam welding method...

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Application Information

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IPC IPC(8): B23K15/00
Inventor 黄瑞董伟明徐静梁可夫
Owner ZHENGZHOU AIRCRAFT EQUIP
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