共查询到20条相似文献,搜索用时 62 毫秒
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利用ProCAST铸造模拟软件,对铝合金压铸件支架充型、凝固过程进行了数值模拟,得到了速度场、温度场的分布和变化规律。结果表明,浇注温度对压铸铝合金的模拟结果影响最大,其次为模具预热温度、充型速度。本试验条件下得到的优化工艺参数:浇注温度为600℃,模具预热温度为200℃,充型速度为2.5m/s。按照优化后的压铸工艺参数进行生产,得到了合格的铸件。 相似文献
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在对铝合金油底壳工艺结构分析的基础上,初步进行了浇注系统设计。通过AnyCasting软件系统地分析了不同工艺参数和内浇道尺寸对铸件充型、凝固过程的影响,预测了铸件缩孔、缩松分布。通过对工艺参数及内浇道尺寸的优化,有效地减少了铸件的缩孔、缩松等缺陷。优化后的工艺参数:浇注温度为650℃,模具温度为190℃,冲头低压速度为0.25m/s,高压速度为3.15m/s;内浇道厚度为6mm。 相似文献
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针对某汽车离合器活塞导柱零件压铸,分析了EN AC-48000铝合金的性能与特点,进行了工艺设计、数值模拟分析,完成了压铸试制,对铸件进行了品质、硬度、显微组织分析。结果表明,EN AC-48000铝合金可以应用于压铸零件成形。环形浇注系统更加适合圆形零件的压铸生产。采用慢压射速度为0.3m/s、快压射速度为3.6m/s、压射比压为80MPa等工艺参数,在不采用真空压铸的条件下生产的铸件,其外观以及内部品质均符合要求。 相似文献
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研究了半固态流变压铸成形技术,设计并制造出不同内浇道尺寸的锁扣半固态压铸模,利用模拟软件对半固态流变压铸充型及凝固过程进行了数值模拟,并进行了试验验证。结果表明,模具温度对半固态压铸影响较大,应保持在250~300℃。压铸模内浇道尺寸也有重要影响,较大内浇道面积(17mm2)的铸件硬度优于较小内浇道面积(11mm2)的铸件硬度。试验得到的最优半固态压铸工艺参数,压射速度为1m/s,模具预热温度为240℃,浆料温度为590℃。 相似文献
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利用压铸工艺生产了铝合金的汽车油底壳。通过前期对产品结构与工艺分析,采取合理的工艺布局和模具结构,避免了产品缺陷的产生。实践表明,先期产品及模具结构和工艺分析合理,铸件品质优良,成功生产出了某1.5T发动机油底壳。 相似文献
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通过有限元数值模拟软件Procast对铝合金支架压铸件进行了数值分析,获得了零件充型过程和凝固时温度场的分布,预测了铸件缺陷存在的位置并分析了其形成原因.通过压铸模拟分析研究了压铸工艺对铸件缺陷的影响.研究表明:铸件随着充型速度的增加,其铸件内部缩孔缩松的含量显著增加;浇注温度越高,铸件内部缩孔缩松也越多. 相似文献
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运用铸造模拟软件Procast对一模四腔的A356铝合金压铸零件进行数值模拟,分析铸件的充型凝固过程,预测缺陷。结果显示:在压射速度为2.5m/s,浇注温度为650℃,模具温度为240℃的条件下四腔同时充填,充型平稳,排气良好,得到充型完整、无缩松缩孔、气孔倾向小的铸件。 相似文献
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Numerical simulation of low pressure die-casting aluminum wheel 总被引:1,自引:0,他引:1
The FDM numerical simulation software, ViewCast system, was employed to simulate the low pressure die casting (LPDC) of an aluminum wheel. By analyzing the mold-filling and solidification stage of the LPDC process, the distribution of liquid fraction, temperature field and solidification pattern of castings were studied. The potential shrinkage defects were predicted to be formed at the rim/spoke junctions, which is in consistence with the X-ray detection result. The distribution pattern of the defects has also been studied. A solution towards reducing such defects has been presented. The cooling capacity of the mold was improved by installing water pipes both in the side mold and the top mold. Analysis on the shrinkage defects under forced cooling mode proved that adding the cooling system in the mold is an effective method for reduction of shrinkage defects. 相似文献
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用有限单元法对7005铝合金通过平面分流模成型齿轮泵体型材的主要过程进行了模拟.针对成型过程中的焊合不良,模具损坏等问题,对相关的工艺参数进行了分析,并结合模拟结果,提出了相应的改进措施. 相似文献
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Strengthening technology and mechanism for semi-solid die casting of aluminum alloy 总被引:10,自引:0,他引:10
Combined with theoretical evaluation,an optimized strengthening process for the semi-solid die castings of A356 aluminum alloy was obtained by studying the mechanical properties of castings solution treated and aged under different conditions in detail,then,the semi-solid die castings and liquid die castings were heat treated with the optimized process.The results show that the mechanical properties of semi-solid die castings of aluminum alloy are superior to those of the liquid die castings,especially the strengthening degree of heat treated semi-solid die castingsis much greater than that of liquid die castings with the tensile strength more than 330 MPa and the elongation more than 10%,and this is mainly contributed to the non-dendritic and more compact microstructure of semi-solid die castings.The strengthening mechanism of heat treatment for the semi-solid die castings of A356 aluminum alloy is due to the dispersive precipitation of the second phase(Mg2 Si) and formation of GP Zone. 相似文献
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