共查询到18条相似文献,搜索用时 93 毫秒
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以2975R22.5轮胎与275/80R22.5轮胎和10R22.5轮胎与9.00R20轮胎为例,说明外直径相近的轮胎共用活络模化纹块和模的条件。当充气外直径D与被套用活络模的外直径Dm满足0.9950Dm〈D〈1.10101Dm时,可以考虑进行活络模的套用。套用已有活络模,一般可节约模具加工的2/3,并缩短2/3模具加工周期。 相似文献
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介绍根据11R22.5无内胎全钢载重子午线轮胎花纹圈进行10.00R20有内胎全钢载重子午线轮胎的设计.结构设计:轮胎外直径取1 054 mm,断面宽取276 mm,行驶面宽度取210 mm,断面水平轴位置(H1/H2)取1.053,胎面花纹为块状混合花纹,花纹深度取18 mm;施工设计:胎面采用两方三块结构,胎体采用1层0.25 6 12×0.225HT高强钢丝帘布,带束层采用2层0°带束层加3层带束层结构,胎圈采用六角形钢丝圈,成型采用一次法成型机,硫化采用B型硫化机.采用这种预先设计的无内胎轮胎花纹圈、配制有内胎轮胎侧板的方法生产的成品轮胎的充气外缘尺寸、强度性能和耐久性能均符合相关设计和国家标准要求,达到了提高模具利用率的目的. 相似文献
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以12.00R20全钢载重子午线轮胎为研究对象,基于Abaqus软件和组合模型技术建立带复杂胎面花纹的轮胎全局模型,然后基于子模型技术建立带束层部分的三维精细网格模型进行有限元分析。结果表明:静负荷工况下,由全局模型与子模型计算得到的应力场比较一致,且Mises应力最大值均出现在胎体帘布层。自由滚动工况下,两层带束层帘线Mises应力分布非常不均匀,但基本关于中分面对称;第2带束层Mises应力高于第1带束层,且各带束层在胎冠部位Mises应力整体高于胎侧部位;胎冠部位两层带束层Mises应力分布变化不大,胎肩部位Mises应力增大,胎侧部位Mises应力减小;第1和第2带束层帘线Mises应力分布关于中分面的对称情况刚好相反。 相似文献
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以子午线轮胎215/75R17.5为例,考虑轮胎变形的几何非线性、材料非线性以及轮胎与地面、轮胎与轮辋的大变形非线性接触等,并考虑复杂胎面花纹,利用ABAQUS软件建立轮胎与地面接触的三维有限元模型。对带复杂胎面花纹的子午线轮胎进行了静负荷工况、和稳态滚动工况的模拟,同时将分析结果与仅带纵向沟槽的轮胎进行了对比,并对轮胎沟裂问题进行了探讨。 相似文献
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用CAE分析软件(Moldflow)对塑料件进行模流分析,选择针阀式热流道、搭接式浇口进胶方式,采用分体式滑块结构减少加工量和加工变形,在大滑块上设计弹块和成型拉块辅助脱模机构,保证产品不粘滑块,可以使产品在向外变形状态时顶出,解决了塑料件侧壁脱模时倒扣的干涉问题。设计了大滑块与型芯及型腔的定位结构,模具结构可靠,注塑产品成型完整,脱模顺利。采用模具快速接插接头系统实现模具注塑装夹时的快速切换,提高了生产效率。在汽车副仪表板模具的开发方面,有一定技术参考价值 相似文献
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论述了甲醇制烯烃产业兴起的背景、国内外代表性技术发展概况、国内部分甲醇制烯烃项目的开展情况。针对实际情况,对山西发展甲醇制烯烃的必要性、可行性、政策支持等进行了探讨和分析,提出了一些思考和建议。 相似文献
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Nanying NingSirui Fu Wei ZhangFeng Chen Ke Wang Hua DengQin Zhang Qiang Fu 《Progress in Polymer Science》2012,37(10):1425-1455
Polymer/filler composites have been widely used in various areas. One of the keys to achieve the high performance of these composites is good interfacial interaction between polymer matrix and filler. As a relatively new approach, the possibility to enhance polymer/filler interfacial interaction via crystallization of polymer on the surface of fillers, i.e., interfacial crystallization, is summarized and discussed in this paper. Interfacial crystallization has attracted tremendous interest in the past several decades, and some unique hybrid crystalline structures have been observed, including hybrid shish-kebab and hybrid shish-calabash structures in which the filler served as the shish and crystalline polymer as the kebab/calabash. Thus, the manipulation of the interfacial crystallization architecture offers a potential highly effective route to achieve strong polymer/filler interaction. This review is based on the latest development of interfacial crystallization in polymer/filler composites and will be organized as follows. The structural/morphological features of various interfacial crystallization fashions are described first. Subsequently, various influences on the final structure/morphology of hybrid crystallization and the nucleation and/or growth mechanisms of crystallization behaviors at polymer/filler interface are reviewed. Then recent studies on interfacial crystallization induced interfacial enhancement ascertained by different research methodologies are addressed, including a comparative analysis to highlight the positive role of interfacial crystallization on the resultant mechanical reinforcement. Finally, a conclusion, including future perspectives, is presented. 相似文献