Brazing aluminum honeycomb forming and welding method

Abstract

The invention discloses a brazing aluminum honeycomb forming and welding method. The method comprises the steps that (1) an upper honeycomb plate body and a lower honeycomb plate body are formed respectively, the forming fillet of the upper honeycomb plate body is R45-60, and the forming fillet of the lower honeycomb plate body is determined according to the thickness of a whole honeycomb plate; the value of the thickness of the whole honeycomb plate is obtained by subtracting the degree of the fillet of the upper honeycomb plate body from the degree of the fillet of the lower honeycomb plate body; (2) a honeycomb core is brazed according to the size specification; (3) a corresponding tool clamp is designed according to the structure of a brazing assembly, the welding seam form and the form and location tolerance; and (4) the formed upper honeycomb plate body, the formed lower honeycomb plate body and the honeycomb core are fixed by using a tool clamp, and placed into a brazing furnace for brazing. The undesirable phenomena of deformation, distortion, cracking and the like of the curved-surface honeycomb plate are solved; batch production of the curved- surface honeycomb plate with the thickness of 12 mm, the internal diameter R60 and the bending right angle of 90 degrees is achieved; manufacturing and processing of a small number of customized curved-surface honeycomb plates can be met; and the production process is simple, the qualified rate is high, and the production effect is good.

Description

technical field [0001] The invention relates to a brazing aluminum honeycomb forming and welding method. The aluminum plate is first formed and then brazed to produce a honeycomb panel with a thickness of 10-15mm and an inner fillet of R45-60 curved 70-90°. It is used in rail transit, Aviation, military supplies and other fields. Background technique [0002] With the maturation of aluminum brazing technology, brazed honeycomb panels with light weight, high strength and better energy absorption have been gradually used in various fields such as rail transit, aviation, military supplies, etc., but the most widely used ones are flat honeycomb panels. Panels and curved honeycomb panels with small curvatures, while curved honeycomb panels with a curvature of 90° or greater at a right angle have not yet received a technical breakthrough. [0003] In the prior art, honeycomb panels with small and large curvatures are basically obtained by roll bending and mold pressing. Small cu...

AI Technical Summary

Problems solved by technology

Small curvature curved honeycomb panels can be mass-produced through the above two methods, but large-curvature honeycomb panels are prone to various undesirable phenomena such as deformation, distortion, and cracking of the honeycomb panel during the production process, and the pass rate is low, so mass production cannot be realized

[0004] The defect of the above-mentioned existing technical solution (using roll bending and mold pressing method) is that deformation, distortion and cracking of the curved surface of the honeycomb panel are uncontrollable. Guaranteed product customization and mass production

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