Aluminum alloy thin-wall component as well as efficient hot stamping forming method and application thereof
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A technology for hot stamping and thin-walled components, which is used in forming tools, vehicle parts, transportation and packaging, etc., and can solve problems such as poor plasticity, low heat treatment process efficiency, and inability to meet process requirements.
Active Publication Date: 2021-05-11
SHANGHAI JIAO TONG UNIV
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In recent years, aluminum alloys with high specific strength, stiffness and good corrosion resistance have attracted the attention of the industry. However, the plasticity of aluminum alloys at room temperature is poor, and the subsequent heat treatment process efficiency of stamping parts is low. Traditional methods cannot meet the requirements of the process. Require
[0003] Utilizing the characteristics of high-temperature plasticity enhancement of aluminum alloys, parts with complex features can be formed by using isothermal forming methods, but subsequent strengthening treatments such as s
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Embodiment 1
[0057] Such as image 3 , Figure 4 , Figure 5 , Figure 7 and Figure 8 As shown, this embodiment takes a 7075-T6 aluminum alloy custom pre-deformation as an example, and simulates the process route provided above, including rapid heating, pre-cooling + pre-deformation, cold mold final forming and baking paint treatment. Including the following steps:
[0058] (1) Rapid heating: The original 7075-T6 aluminum alloy plate 1 performs rapid heat exchange through contact with the high-temperature heated flat mold 2. The average heating rate is about 80°C / s after testing, and the heating temperature is higher than the solid solution temperature of the aluminum alloy. Lower than 250°C, hold the pressure in the flat mold 2 for 5s, and heat to the target temperature.
[0059] (2), pre-cooling + pre-deformation: transfer the high-temperature 7075-T6 aluminum alloy plate 1 to a high-temperature custom-made pre-deformation mold 4 at 400°C, the transfer time is 1s, and adopt a custo...
Embodiment 2
[0063] Such as image 3 , Figure 4 , Figure 6 , Figure 7 and Figure 8 As shown, this embodiment takes a uniform pre-deformation of a 7075-T4 aluminum alloy as an example, and simulates the above-mentioned process route, including rapid heating, pre-cooling + pre-deformation, cold mold final forming and baking paint treatment. Including the following steps:
[0064] (1) Rapid heating: The original 7075-T4 aluminum alloy plate 1 performs rapid heat exchange by contacting the high-temperature heated flat mold 2. The average heating rate is about 80°C / s after testing, and the heating temperature is higher than the solid solution temperature of the aluminum alloy. Lower than 200°C, hold the pressure in the flat mold 2 for 5s, and heat to the target temperature.
[0065] (2), pre-cooling + pre-deformation: transfer the high-temperature 7075-T4 aluminum alloy plate 1 to the high-temperature pre-deformation mold 4 at 400°C, the transfer time is 1s, and the original 7075-T4 al...
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Abstract
The invention provides an aluminum alloy thin-wall component as well as an efficient hot stamping forming method and application thereof. According to the aluminum alloy thin-wall component as well as the efficient hot stamping forming method and application thereof, by means of the characteristics of high efficiency, fast rhythm and high integration degree of a progressive die, the process steps of rapid heating-precooling and predeformation-final forming of a cold die are integrated into one progressive die, and paint baking treatment is carried out, namely, aging-state high-strength aluminum alloy is adopted, carries out rapid heat exchange by making contact with a heating flat plate die, and a forming temperature interval can be reached by controlling a contact pressure and maintaining the pressure for a short time; uniform accumulative dislocation of strain is generated through the precooling and predeformation, meanwhile, a high-temperature softening phenomenon of the aluminum alloy material in a high-temperature deformation stage is avoided, and the purpose of deformation is achieved; and finally, stamping is carried out in a room-temperature final forming die to obtain a required part, and the paint baking treatment is carried out. According to the method, the production cycle for an aluminum alloy hot-formed part is greatly shortened, the method is suitable for a fast-rhythm continuous industrial production mode, and high in process step integration degree, the equipment cost and the time cost are saved, and meanwhile the mechanical property of the formed part is guaranteed.
Description
technical field [0001] The invention belongs to the technical field of sheet metal forming and processing, and in particular relates to an aluminum alloy thin-walled component and its high-efficiency hot stamping forming method and application. Background technique [0002] In response to the energy crisis and environmental crisis, the development of advanced manufacturing technology to achieve lightweight structures has become a research hotspot in the aerospace and automotive industries. In recent years, aluminum alloys with high specific strength, stiffness and good corrosion resistance have attracted the attention of the industry. However, the plasticity of aluminum alloys at room temperature is poor, and the subsequent heat treatment process efficiency of stamping parts is low. Traditional methods cannot meet the requirements of the process. Require. [0003] Utilizing the characteristics of high-temperature plasticity enhancement of aluminum alloys, parts with complex...
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