A Progressive Creep Aging Forming Process for Complex Aluminum Alloy Components
A creep aging forming and aluminum alloy component technology, which is applied in the direction of manufacturing tools, furnaces, heat treatment equipment, etc., can solve problems such as instability, and achieve the advantages of shortened manufacturing time, strong process controllability, and stable creep aging forming. Effect
Active Publication Date: 2021-07-20
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 sheet; then cold-rolled at room temperature for 80% deformation treatment, and then multi-stage relaxation experiments are carried out in a creep machine to relax and age The temperature was selected as 120 °C, and the relaxation stress was selected as 300 MPa. The specific experimental process was as follows: firstly heated to 120 °C, then loaded to 300 MPa, relaxed and aged for 1 h, then unloaded under heat preservation, reloaded to 300 MPa after 5 min, and relaxed and aged for 1 h until Complete 7 relaxation agings.
[0018] Table 1 The amount of relaxation (MPa) of the embodiment of the multi-stage relaxation aging
[0019] Level 1 secondary Level 3 Level 4 Level 5 Level 6 Level 7 slack 135 123 124 126 126 131 130
[0020] Table 1 is the relaxation amoun...
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Abstract
A progressive creep aging forming process for complex aluminum alloy components. The aluminum alloy sheet is placed in a forming mold with a bending radius of 800mm-5000mm and fixed. The stress relaxation of the aluminum alloy mainly occurs when the creep aging forming is used in the present invention. According to the characteristics of the last 1-2 hours, the entire deformation is divided into multiple levels, and the plate is pressed to the first-level deformation position with a loader for creep aging, then unloaded, and then pressed to the second-level deformation position. Creep aging, repeated sequentially, finally unloading the sheet from the mold. The invention divides the creep aging forming of the aluminum alloy sheet into multi-stage progressive creep aging forming by changing the tooling, and each stage completes a part of the deformation, thereby avoiding problems such as instability, buckling and cracking in the forming process of the component, and greatly improving The forming limit, in addition, the overall manufacturing time will not increase or even shorten.
Description
technical field [0001] The invention belongs to the technical field of mechanical forming and manufacturing engineering, and particularly relates to a progressive creep aging forming process for complex aluminum alloy components. Background technique [0002] Aluminum and aluminum alloys have many advantages such as low density, high corrosion resistance, good electrical and thermal conductivity, etc. They have become key materials in modern aerospace and are widely used in the manufacture of rocket main structures, aircraft wing panels and fuselage skins. . In recent years, aerospace large-scale structural parts have been developing towards light weight, long life and high reliability, and the 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 suitable for th...
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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