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围绕大尺寸箱底构件整体成形需求，提出了“卷焊制坯+收口成形”的整体成形方法。以带焊缝的2219-T351铝合金环件为研究对象，利用有限元模拟分析了焊缝强度系数和焊缝数量对带焊缝环件收口成形质量的影响规律，并对比了不同局部增厚形式对带焊缝环件收口成形质量的提升效果。结果表明：焊缝强度系数低于0.9时，带焊缝环件存在较为显著的起皱失稳现象；而高于0.9时与无焊缝环件成形结果基本一致。随焊缝强度系数从0.5增加至0.9时，带焊缝环件起皱度由9.1%线性降低至0.2%。随焊缝数量增加，带焊缝环件起皱度略有下降，但并未显著改善环件的起皱失稳现象。相较于台阶式、线性式局部增厚方式，圆弧式局部增厚方法能够有效提升带焊缝环件收口成形质量，但圆弧式局部增厚厚度须小于5 mm。此外，采用圆弧式局部增厚方法可以降低带焊缝环件对焊缝强度系数的要求。
Abstract：To meet the requirements for the integral forming of a large-scale dome component, the integral forming method of “rolled-welded blank preparation + nosing forming” was proposed. Taking the 2219-T351 aluminum alloy ring with weld as the research object, the influences of weld strength coefficient and weld number on the nosing forming quality of the ring with weld were analyzed through finite element simulation. The effects of different local thickening methods on the nosing forming quality of the ring with weld were compared. The results show that when the weld strength coefficient is below 0.9, the ring with weld exhibits significant instability and wrinkling phenomenon. When it is above 0.9, the forming results are essentially the same as those of the ring without weld. As the weld strength coefficient increases from 0.5 to 0.9, the wrinkling degree of the ring with weld decreases linearly from 9.1% to 0.2%. As the weld number increases, the wrinkling degree of the ring with weld slightly decreases, but this does not significantly improve the wrinkling phenomenon of the ring. Compared with stage-type and linear-type local thickening methods, the arc-type local thickening method effectively improves the nosing forming quality of the ring with weld. But the arc-type local thickening thickness must be less than 5 mm. Furthermore, the arc-type local thickening method can also reduce the requirements for the weld strength coefficient of the ring with weld.
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基本信息:
中图分类号:V46;TG441.7;TG306
引用信息:
[1]欧阳亚文,赵亦希,李晓凯,等.带焊缝环件收口成形质量及其改善方法研究[J].塑性工程学报,2026,33(07):41-51.
基金信息:
中国航天科技集团公司第八研究院产学研合作基金资助项目(USCAST2023-9)
2026-07-20
2026-07-20
2026-07-20