Progressive creep age forming process for complex aluminum alloy components
A technology of creep aging forming and aluminum alloy components, applied in the direction of manufacturing tools, furnace types, furnaces, etc., can solve problems such as instability, achieve shortened manufacturing time, strong process controllability, instability and buckling cracking tendency Reduced effect
Active Publication Date: 2019-03-19
CENT SOUTH UNIV
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Problems solved by technology
[0003] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a progressive creep aging forming process for complex aluminum alloy components, by changing the tooling, the creep aging forming of aluminum alloy sheets is divided into multi-stage progressive creep Aging forming, each stage completes a part of the deformation, thereby avoiding problems such as instability, buckling and cracking during the forming process of the component, and greatly improving the forming limit
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[0017] Example: Reference figure 1 , 2219 aluminum alloy is subjected to solution treatment and water quenching in an air circulation resistance furnace to obtain an aluminum alloy plate; then cold rolling at room temperature for 80% deformation treatment, and then multi-stage relaxation experiments in a creep machine, relaxation aging The temperature is selected to be 120°C, and the relaxation stress is selected to be 300MPa. The specific experimental process is as follows: firstly, the temperature is raised to 120°C, and then loaded to 300MPa for 1h of relaxation aging, and then unloaded by heat preservation, and then reloaded to 300MPa after 5min, for 1h of relaxation aging, until Complete 7 relaxation times.
[0018] Table 1 embodiment carries out the relaxation amount (MPa) of multistage relaxation aging
[0019]
[0020] Table 1 is the amount of relaxation at each stage of progressive relaxation aging using the method of the present invention, figure 2 It is...
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Abstract
A progressive creep age forming process for complex aluminum alloy components is provided. An aluminum alloy sheet is placed in a forming die with a bending radius of 800 mm to 5000 mm and fixed. Thestress relaxation of an aluminum alloy typically occurs within one to two hours after loading during the creep age forming, so the entire deformation amount is divided into multiple stages. The aluminum alloy sheet is pressed to a first-stage deformation position by a loader to perform creep aging, unloaded, then pressed to a second-stage deformation position for creep aging, repeated in turn, andfinally unloaded from the mold. The process provided by the invention divides the creeping age forming of the aluminum alloy sheet into a multi-stage progressive process by changing the tooling, andcompletes a part of the deformation in each stage, thereby avoiding problems such as instability, buckling and cracking of the forming process, and greatly raising the forming limit. In addition, thetotal manufacturing time will shorten.
Description
technical field [0001] The invention belongs to the technical field of mechanical forming manufacturing engineering, in particular to a progressive creep aging forming process of complex aluminum alloy components. Background technique [0002] Aluminum and aluminum alloys have many advantages such as low density, high corrosion resistance, and good electrical and thermal conductivity. They have become the key materials of modern aerospace and are widely used in the manufacture of rocket main structures, aircraft wing panels, and fuselage skins. . In recent years, large-scale aerospace structural parts have been continuously developed in the direction of lightweight, long life, and high reliability, and their service performance has gradually become extreme, which puts forward high requirements for forming technology. In recent years, creep aging forming has gradually been applied in major aerospace equipment such as aircraft and rockets. Creep aging forming technology is s...
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IPC IPC(8): C22F1/04C21D9/00
CPCC21D9/0081C22F1/04
Inventor 刘春辉杨建使马培培陈凱亮湛利华
Owner CENT SOUTH UNIV