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针对汽车覆盖件中的非旋转体、异型深拉延产品的制造,分别对其深拉延件进行工艺分析及计算和模具结构的认定,阐述拉延成型过程中的特点、难点,和解决难点的关键。 相似文献
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对CA151型汽车制动鼓挡油盘拉延成型工艺进行了探讨。通过对其拉延成型过程中,金属的应力应变的分析,提出了防皱措施。采用一次拉延成型,并在其底部预冲工艺孔,可控制径向应力的大小。采用了落料、冲孔、拉延成型“三位一体”的模具。 相似文献
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介绍复合材料模具的结构及制造工艺。该模具的凸、凹模刃口四边镶条用锰钢,其它用复合材料填充,模架,围板及压边圈等用普通钢板制造。 相似文献
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Development of hot stamped center pillar using form die with channel type indirect blank holder 总被引:1,自引:0,他引:1
H. S. Choi B. M. Kim K. J. Nam S. Y. Ha S. H. Cha C. G. Kang 《International Journal of Automotive Technology》2011,12(6):887-894
The hot stamping process has been used in the automotive industry to reduce the weight of the body-in-white and to increase
passenger safety via improved crashworthiness. However, defects such as fracture and wrinkle occur when hot stamping is performed
using a conventional drawing or forming method. In this study, a channel-type indirect blank holder (CIBH) is proposed to
develop a high-strength center pillar in form-type hot stamping, so that the aforementioned drawbacks are overcome. This type
of blank holder plays an important role in reducing severe wrinkling at the flange; such wrinkling leads to folding after
the completion of form-type hot-stamping. First, we investigated the effect of the channel shape on the indirect blank holding
force by using a simplified two-dimensional plane-strain stamping process. Second, we selected the slope angle and corner
radius of the channel as the main shape parameters by finite element analysis and artificial neural network (ANN). It is known
that fracture at the hot formed wall and wrinkle at the flange are significantly affected by the slope angle of the channel,
and the appropriate value for eliminating fracture and wrinkle is determined to be 99°. By performing hot stamping using a
form die with the selected channel, we can manufacture a high-strength center pillar without wrinkle and fracture. 相似文献
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根据软化仪表板的性能要求,选定木质纤维增强复合材料做仪表板骨架材料,采用正交试验方法研究了材料的组分和固化工艺参数,并对影响材料性能的纤维含量、纤维预处理和固化工艺参数分别进行了研究。根据复合板的性能选定了最佳参数值。 相似文献
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桑塔纳轿车车顶冲压成形动态仿真 总被引:3,自引:1,他引:3
本文建立了车身覆盖件冲压成形CAE系统,其中包括模具和板材几何造型系统、冲压成形大变形弹塑性有限元分析系统以及分析结果后处理系统。 相似文献
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基于汽车轻量化用材,介绍了一种显著减轻车身质量的新型薄板--连续变截面辊轧板(TRB).与激光拼焊板相比,TRB在减重效果、机械性能、适应性、厚度优化分布、断面曲线多样化、后续加工可靠性等方面有着明显的优势.讨论了TRB在车身制造中需要解决的覆盖件模具设计、冲压成形过程中的变形、材料流动性和板料回弹等关键问题. 相似文献
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碳纤增强材料是一种高强度复合材料,具有质轻、高强度、耐腐蚀、抗老化、易成型等特点。在车身部件中使用碳纤增强材料可降低车身质量,并降低油耗,因此该材料在未来环保车型的开发中具有较强竞争力。文章具体介绍了碳纤车身覆盖件制造工艺及拼装等要求。 相似文献