| 摘要: |
| 针对航天领域大型薄壁空心构件在连续热挤压过程中产生的不良变形问题，提出了充压镦形精密校形
工艺。以具有轴向弯曲缺陷的单腔和多腔铝合金挤压件为研究对象，首先，利用有限元仿真探索了关键工艺参数
对校形结果的影响，确定了校形后误差值与校形压缩量之间的变化关系。在此基础上，根据校形产品形状设计充
压镦形模具，开展空心构件精密校形试验。结果表明，经充压镦形校正后的空心构件具有高度形状精度，满足生
产制造标准。充压镦形技术不仅可用于单腔大型薄壁空心构件的精密校形工作，而且可适用于铝合金大尺寸异形
多腔构件，有助于满足未来空心构件制造中多样化型号所带来的高效率和高精度要求。 |
| 关键词: 大型薄壁 空心构件 异形多腔 充压镦形 精密校形 |
| 基金项目:国防科技重点实验室基金（JCKYS******3C005）；国家自然基金（523***48） |
|
| Study on Precision Calibration Process of Large Thin-walled Hollow Components |
|
Wang Qingfeng1,2, Sun Lei1,2, Wang Shenglong3, Guo Xiaolin3, Chu Guannan1,2
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1. Harbin Institute of Technology (Weihai) School of Materials Science and Engineering, WeiHai 264209;2. National Key Laboratory for Precision Hot Processing of Metals, Harbin Institute of Technology, Harbin 150001;3. Beijing Hangxing Machinery Manufacturing Co., Ltd., Beijing 100013
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| Abstract: |
| To address the issue of undesirable deformation in large thin-walled hollow components within the
aerospace sector during continuous hot extrusion, a hydroforging precision calibration process was proposed. Focusing on
single-cavity and multi-cavity aluminum alloy extrusions with axial bending defects as the research objects, the influence
of key process parameters on the calibration results was initially explored through finite element simulation, and the
variation relationship between different error amounts and calibration compression was determined. Subsequently, a
hydroforging mold was designed based on the shape of the calibrated product, followed by a precision calibration test
conducted on the hollow components. The results indicate that hollow components corrected by hydroforging exhibit high
shape accuracy and comply with manufacturing standards. The study findings demonstrate that hydroforging technique
can be used not only for the precision calibration of single-cavity large-size thin-walled hollow components, but also for
large-size heteromorphic multi-cavities components of aluminium alloys, thereby addressing the high efficiency and
precision requirements posed by the diverse array of hollow components in future manufacturing processes. |
| Key words: large thin-walled hollow components heteromorphic multi-cavities hydro-forging precision
calibration |
