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《特种铸造及有色合金》2018,(11)
利用铸造模拟技术对铸件充型凝固过程进行分析,可以大大降低成本,缩短试制周期。基于此,利用ProCAST软件对薄壁叶片的熔模精铸过程进行数值模拟,通过分析铸造缺陷,提出从浇注系统结构和浇注工艺参数两方面进行工艺优化,获得了合格的铸件。 相似文献
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汽车铝合金排水管倾转铸造数值模拟 总被引:1,自引:1,他引:0
以汽车用铝合金排水管倾转铸造作为研究对象,运用AnyCasting软件对铝合金排水管铸件在重力下及倾转条件下的充型、凝固过程进行了数值模拟。通过对模拟结果数据进行定量分析,发现对于结构较为复杂且长度与厚度比差值较大的薄壁铸件,与重力浇注相比,倾转浇注具有较低且平稳的充型速度、充型压力自下而上分布均匀、排气效果好、卷气以及缩孔倾向小等特点,大大提高了铸件质量以及工艺出品率。 相似文献
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Computer simulation codes were developed based on a proposed mathematical model for centrifugal mold filling processes and previous computer software for 3D mold filling and solidification of castings (CASM-3D for Windows). Sample simulations were implemented for mold filling processes of precision titanium castings under gravity and different centrifugal casting techniques. The computation results show that the alloy melt has a much stronger mold filling ability for thin section castings under a centrifugal force field than that only under the gravity. A "return back" mold filling manner is showed to be a reasonable technique for centrifugal casting processes, especially for thin section precision castings. 相似文献
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I t is of great im portance to investigate the casting processes forhigh precision thin wallferrous m etalparts because the processes are helpful in reducing energy consum ption,saving raw m aterials and decreasing m achine weight.To achieve these objectives,m any casting m ethods have been developed.Vacuum -sealed m olding process,the V-processforshort,iswidely used to m ake iron castingswith relatively thin wall,high precision and sm ooth surface [1-4]. H owever,the process cannotbe used to … 相似文献
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3-D velocity and temperature fields of mold filling and solidification processes of large-sized castings were calculated, and the efficiency and accuracy of numerical calculation were studied. The mold filling and solidification processes of large-sized stainless steel, iron and aluminum alloy castings were simulated by using of new scheme; their casting processes were optimized, and then applied to produce castings. 相似文献
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铸件充型凝固过程数值模拟发展现状 总被引:18,自引:1,他引:17
铸件内在质量很大程度上取决于铸件的充型和凝固过程。将计算流体力学、计算传热传质学和计算机可视化技术应用于铸造工艺设计 ,可以使铸造技术人员更清楚地了解铸件形成过程 ,快捷地确定较为合理的铸造工艺参数。本文对铸件充型和凝固过程的数学模型、计算方法及商品化软件方面的发展现状进行了综合评述 ,并展望了该领域的发展前景。 相似文献
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Ti-6-4合金熔体离心铸造过程中流态分析 总被引:4,自引:2,他引:2
针对金属型离心浇铸Ti6Al-4V(Ti-6-4)合金人工骨关节,对其充型过程进行了理论分析,得出了熔体离心充型过程中的层流判据以及熔体自由面仍的变化规律,结果表明,离心力场下,熔体充型时可保持的层流长度随转台转这的提高而减小;熔体自由表面将发生倾斜,最终趋于竖直,此外,讨论了离心力场下铸件内部卷入性气孔和偏中心线缩松的产生原因及分布规律。 相似文献
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本文分析了金属型离心浇铸TiV15Cr3Sn3Al3(Ti 15 3)合金铸件的充型过程 ,得出了熔体在离心充型过程中的层流判据 ,以及熔体截面倾角的变化规律。总结了在离心力场下铸件内气孔和缩松的分布规律。计算结果表明 :离心力场下充型时 ,熔体可保持的层流长度随转台转速的提高而减小 ;转台转速足够高时 ,最大倾角随转台转速的提高而增大。 相似文献