Rectangular frame combined welding structure with large length-width ratio and welding method thereof

Abstract

The invention discloses a rectangular frame combined welding structure with a large length-width ratio and a welding method thereof. The problems that a rectangular steel plate frame with the large length-width ratio is prone to deformation during welding and weld joint flaw detection is difficult are solved. In an electron beam vacuum welding chamber, a rectangular frame is composed of a long-strip-shaped front side plate (1), a long-strip-shaped rear side plate (2), a rectangular left side plate (3), a rectangular right side plate (4) and four connecting square stand columns (8) which are completely the same in structure. Manual groove argon arc welding is conducted between the inner side welding plane (15) of the front side face of each connecting square stand column and the inner sidewelding plane (7) of the rear side face of the rectangular left side plate, and a first manual groove argon arc welding fillet weld (20) is formed. Manual groove argon arc welding is conducted betweenthe horizontal plane (18) of the rear inner side of each stand column and the inner side face of the long-strip-shaped rear side plate (2), and a second manual groove argon arc welding fillet weld (11) is formed. Thus, conduction of welding stress of a thin-wall frame body is overcome to the maximum extent.

Description

technical field [0001] The invention relates to a box body welded by steel plates, in particular to a step-by-step combined welding structure of a rectangular frame welded by steel plates with a large aspect ratio and a welding method thereof. Background technique [0002] The shell of some products is a rectangular box structure. The rectangular box is composed of a rectangular frame, a top plate, and a bottom plate. The rectangular frame is welded by splicing two rectangular steel plates and two square steel plates. Generally, it is carried out in the form of manual groove welding. First, a V-shaped welding groove is processed at the joint of the two steel plates, and then argon arc welding machine is used for surfacing welding at the groove. , a large amount of heat will be input, and the heat will deform the steel plate through the conduction of the thin-walled steel plate, especially for the frame that is spliced ​​by the thin-walled steel plate and has a large length-t...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a combined welding structure of a rectangular frame with a large aspect ratio and a welding method thereof, which solves the technical problems that the rectangular steel plate frame with a large aspect ratio is easily deformed and weld seam flaw detection is difficult

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