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冲压模具工作状态的好坏直接关系到冲压件质量、生产效率和废品、修返品损失,而拉延模调试技术是保证模具稳定工作的关键。介绍了新宝来后轮罩出现拉裂、缩颈、起皱、缺边、拉毛等问题的解决方法,以及提高模具生产稳定性方面的拉延模调试过程,包括拉延平衡块的配置和压料面的研配方法,深拉延模具的拉延筋和压料面在控制板料流动方面的作用分配,拉延件缺陷、变形的分析和对策,并提出改进冲压工艺的一点建议。 相似文献
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对奔腾轿车外板-后围板在拉延过程中的钢板锌层剥落、制件起皱和开裂现象进行了分析,从冲压工艺、模具设计,模具调整等方面说明零件产生拉延起皱、开裂等缺陷的原因,并提出了解决措施. 相似文献
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介绍了凌河牌汽车驾驶室后门柱拉延工艺及模具设计过程。根据工件在拉延过程中材料变形,流动特点,该设计从工艺和模具结构两方面采取了模拟,并采用了较为新颖的内一外双边结构,有效地解决了拉裂和起皱问题,提高了产品质量。 相似文献
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通过对双动拉延模改单动拉延模、模具自动化改造可行性进行冲压工艺分析,并对模具进行改造,实现了制件工艺路线由双动手工生产线变更为单动自动化生产线,均衡了双、单动生产线产能,为工艺路线变更提供了新的思路和方法。主要介绍双动拉延模改单动拉延模具的工艺与改造方法,制件在冲压机械手自动化线生产时模具安装与自动化可行性分析要点,重点是端拾器可行性分析、轨迹干涉分析、模具电气改造等。通过前期的工艺可行性分析和方案改进,避免了冲压件自动化生产时出现较大的工艺问题。 相似文献
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本文通过对T53侧围拉延成形模具转移超载拉延力的结构设计进行分析,介绍一种不同于传统的、新的拉延模结构。 相似文献
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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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伴随传统机械模具加工劣势日渐凸显,其加工技术逐步被更新,随之替代的便是高精准度、高效率的数控加工技术,凭借自身优势特征,成为机械制造主力军.其实际应用于机械模具制造中,不仅提高生产效率,而且保证生产质量,实现双质提升,是未来机械制造发展趋势.本文主要分析数控加工技术在机械模具制造中应用. 相似文献
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分析上支座加强板的成形工艺,并介绍了此工艺方案下的拉延工序的工艺补充面的建立、模具结构的设计及模具的工作过程。 相似文献
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在汽车标准件的生产过程中,模具起着主导作用,只有提高模具寿命,才能起到事半功倍的效果。有效提高标准件模具的寿命,除了需要合理选用模具的材料,合理设计模具的结构,做好模具的热处理以及加工与抛光外,还要选用恰当的润滑剂和精度高的设备,同时要加强管理,提高操作者的素质。 相似文献
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J. -H. Choi S. -H. Choi D. Park C. -H. Park B. -O. Rhee D. -H. Choi 《International Journal of Automotive Technology》2012,13(2):273-277
The quality of an injection molded part is largely affected by the mold cooling. Consequently, this makes it necessary to
optimize the mold cooling circuit when designing the part but prior to designing the mold. Various approaches of optimizing
the mold cooling circuit have been proposed previously. In this work, optimization of the mold cooling circuit was automated
by a commercial process integration and design optimization tool called Process Integration, Automation and Optimization (PIAnO),
which is often used for large automotive parts such as bumpers and instrument panels. The cooling channels and baffle tubes
were located on the offset profile equidistant from the part surface. The locations of the cooling channels and the baffle
tubes were automatically generated and input into the mold cooling computer-aided engineering program, Autodesk Moldflow Insight
2010. The objective function was the deviation of the mold surface temperature from a given design temperature. Design variables
in the optimization were the depths, distances and diameters of the cooling channels and the baffle tubes. For a more practical
analysis, the pressure drop and temperature drop were considered the limited values. Optimization was performed using the
progressive quadratic response surface method. The optimization resulted in a more uniform temperature distribution when compared
to the initial design, and utilizing the proposed optimization method, a satisfactory solution could be made at a lower cost. 相似文献
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Numerical analysis is used to optimize the gate shape of the mold part in the molding process. The objective of this research was to develop a procedure that will optimize the gate shape of the mold part by using Design of Experiments approach. The computer-aided engineering software Moldflow was used to simulate the plastic injection molding process and the Minitab software was used to analyze the computational results from Moldflow. The Bulk Molding Compounds (BMC) UNI-203S thermoset material was chosen as the molding material. Four different types of gate shapes were analyzed to find the gate shape to be used in the optimization. The Type 3 gate shape was selected as basis for the gate optimization because this shape yielded the minimum shear rate around the gate among all. The thickness, width, length and angle of the gate were selected as the design variables. Erosion around a gate due to repetitive shear flow during molding process was considered as an important issue to extend the service life of the expensive mold. It is normally very difficult to prevent erosion due to high injection pressure and repetitive use of the mold, especially in certain molding parts as BMC reflector in automotive parts, so it has become the subject of researches. The effectiveness of design variables was evaluated by observing shear rate around the gate. The objective of the optimization was to minimize the average shear rate around the gate. Response Surface Method was applied to identify the optimum values of the design variables. The computed optimum values were validated numerically. The optimized gate shape showed the reduced shear rate by about 11%. 相似文献
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针对汽车覆盖件在传统冲压工艺中方案难以确定,需反复进行试模的问题,引入了板料成形有限元分析软件Autoform 对汽车保险杠板料进行冲压仿真,准确预测了板料在成形过程中可能出现的缺陷,从而在汽车保险杠模具加工前对设计方案进行及时调整,使得修模工作量减少50%以上. 相似文献
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