Thermal Calibration Method of Antirust Aluminum Alloy Sheet Welding Saddle Components

Abstract

The invention discloses a thermal correcting method for a rust-proof aluminum alloy metal plate welded saddle-shaped component. The thermal correcting method comprises the following steps of: measuring the dimension of each part of a to-be-corrected part, and calculating deviation; fixing the to-be-corrected component on a tool to carry out compactness regulation on each part; and heating the tool with the to-be-corrected component to 275-285 DEG C at a heating rate being 1 DEG C / minute, preserving the heat for 55-65 minutes, and carrying out air-cooling to the room temperature. The method adopts a multi-point-restraint and locally adjustable integral type tool, carries out heat preservation at a temperature a bit higher than a material re-crystallization temperature by regulating the dimensions of feature points, and can realize precise correction for deformations of various degrees within certain range after realizing welding on the to-be-corrected component, so that the to-be-corrected component meets follow-up assembly requirements. The thermal correcting method is clear in principle, the tool structure is simple, mounting and dismounting are convenient, measuring is simple, inner-diameter two-end shrinking deformation can be effectively corrected to be within a range less than or equal to 1mm from 3.5 mm after welding, outer-diameter middle expanding deformation can be effectively corrected to be within a range less than or equal to 0.9 mm from 3 mm, quadrilateral unevenness is corrected to be within a range less than or equal to 0.5 mm from greater than or equal to 1 mm.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy heat treatment, in particular to a thermal correction method for thin-walled sheet-welded saddle-shaped components, which is suitable for post-welding deformation correction of 5A06 large-scale thin-walled sheet-welded aluminum alloy parts. Background technique [0002] In the fields of weaponry, aerospace and other fields, with the continuous improvement of tactical requirements, the structural form of weapon products is becoming more and more complex, and there are more and more complex structures with non-circular cross-sections; and in order to meet the needs of lightweight products, aluminum alloy The sheet welding structure is more and more widely used. 5A06 material has high strength, corrosion stability and good welding performance, and has become the preferred material for aerospace stress components, skin and skeleton parts. However, due to the complex structure, large number of ...

AI Technical Summary

Problems solved by technology

However, due to the complex structure, large number of welds, and large length of welds, sheet-welded parts will inevitably generate internal stress during the welding process, resulting in complex deformation of the components

Taking a 5A06 sheet welding saddle structure as an example, after welding, the deformation of both ends of the inner diameter can reach about 3.5mm, the expansion deformation of the middle section of the outer diameter can reach about 3mm, and the deformation of the four corners can reach ≥1mm. Moreover, after each welding Dimensional deviations are different, and the size of parts is extremely unstable, which makes the subsequent assembly of parts and other components difficult, and directly affects the production of the overall structure of weapon products

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