空气弹簧硫化机的研制

简要介绍了一种空气弹簧专用硫化机的结构设计。该机是根据空气弹簧产品特点，参照液压式轮胎硫化机结构而研制的，主要由机架、锁模油缸、加热板、中心机构等组成。该设备可生产多种规格空气弹簧产品，产品可替代进口。     

复合减震橡胶空气弹簧总成的研制

介绍复合减震橡胶空气弹簧（由减震器、橡胶空气弹簧、上盖、上箍环、下箍环、下底座和密封圈组成）的研制。成品试验结果表明，本研制复合减震橡胶空气弹簧气密性、爆破压力、静态特性和疲劳寿命均满足国家或企业标准要求。     

汽车橡胶空气弹簧的研制

汽车橡胶空气弹簧的研制本文简介了河南尉氏县橡胶厂Ｂ２６０－３４０型橡胶空气弹簧的研制。１结构尺寸橡胶空气弹簧是由外层胶、内层胶、帘布层、钢丝圈等组成的元件。本厂研制的橡胶空气弹簧结构尺寸见附图。附图Ｂ２６０－３４０型橡胶空气弹资的结构尺寸示意图２配方...     

橡胶空气弹簧的研制

橡胶空气弹簧的研制尉氏县橡胶厂张清俊近年来，我国从国外进口了大量的豪华客车，均采用橡胶空气弹簧，已成为汽车的重要配件和易损件。根据我国现有客车以及将来发展和改造的客车数量，如选用橡胶空气弹簧，估计其各种规格的年需求量将达１００万只左右，市场前景广阔。...     

冲床大物理工艺改进初探

本文就冲床的大修理工艺，提出了新的修理方法并付诸实践，取得了良好的效果为冲床以及后修理的方法的完善，提出了新的思维方式。     

搪瓷坯胎落片自动送料装置

研制成一台搪瓷坯胎连续落片的自动送料装置,由两台冲床和一套与它相配合工作的联动装置组合而成。本装置显著提高了落片作业的工作效率。     

丁二烯装置离心泵用机械密封改造

介绍某丁二烯装置ZE型离心泵机械密封的弹簧及辅助密封环在选材上存在的一些问题，通过重新设计和研制改进，收到良好效果。     

铁道车辆用空气弹簧橡胶囊的研制

简述铁道车辆用空气弹簧与金属弹簧相比所具有的主要特点,着重阐述了空气弹簧主要部件———橡胶囊的结构、技术要求和研制中骨架材料的选用及胶料的选用原则,同时对橡胶囊的生产设备和生产工艺特点做了扼要的介绍。     

酚醛塑料板粘接技术在大型冲床修理中的应用

由于氟塑料分子的内聚力小、材质软、粘接强度差,因此不适宜粘接振动负荷和摩擦力大的冲床磨损部件。对于大型冲床磨损面的修复,我们选用了粘接强度高的酚醛塑料板作为耐磨材料,并在苏制160T 冲床和国产315T 冲床的导轨磨损面进行了酚醛塑料板粘接试验,取得了     

复合材料板式弹簧的研制及性能

主要介绍了一种轻型汽车复合材料板式弹簧的研制过程及性能。试验结果表明,复合材料板簧质轻,内部缺陷少,具有良好的热稳定性及较高的耐热温度,疲劳寿命远优于传统的钢板弹簧。     

Theoretical assessment of the limit strengthening criterion of strengthened bridge decks based on failure characteristics

The dominant failure modes of bridge deck are either flexure-shear or punching shear. Bridge decks strengthened with fiber reinforced polymers (FRPs) have an increased punching shear strength as well as improved flexural strength. This transforms the failure mode from biaxial bending to punching shear. Therefore, it is desirable to design the strengthened bridge deck so that it fails due to similar ductile behavior and with similar failure patterns as unstrengthened bridge decks, even though the ultimate strength of a strengthened deck with external reinforcements is much greater than its punching shear strength. For this reason, the concept of a strengthening limit criterion is introduced in this paper to ensure that strengthened decks have ductile dominant failure modes. The concept of failure mode transition, which is dependent on the amount of strengthening, is introduced in the practical design procedure, and a criterion for selecting the strengthening ratio is developed.     

Effect of needle-punching density on the permeability of materials

The needle punching density influence on material permeability in air filtration has been investigated. It has been found that the maximum permeability is gained under definite density of needle punching. The density of needle punching material is proposed to be estimated by the pore size and the pore tortuosity. The density influence of needle punching on characteristic variation has been demonstrated. Translated from Khimicheskie Volokna, No. 1, pp. 35-37, January-February, 2009.     

针刺用炭布／网胎复合织物单层增厚及变形性分析

炭布／网胎复合织物是C／C复合材料针刺预制体的一种重要原料。本文研究了针刺后不同种类炭布／网胎复合织物的单层增厚及针刺变形性。单层增厚与针刺后复合织物的结构、织物的厚度均匀性和针刺密度有关。针刺后复合织物的结构为“销钉”结构,织物的厚度均匀性影响Z向纤维的引入量,针刺密度是影响单层增厚最为显著的因素。针刺密度为20针／cm^2时,预氧丝网胎复合织物的单层增厚小于0．2mm,增厚百分比在4％～25％之间;针刺密度为32针／cm^2时,炭纤维网胎复合织物的单层增厚在0．14mm-0．23mm之间,增厚百分比在16％～34％之间。不同种类炭布／网胎复合织物的整体变形性较为相似,针刺变形性与炭布的结构有关。     

玄武岩纤维混凝土板冲切试验与承载力分析

为探究玄武岩纤维对混凝土板抗冲切性能的增强效果,基于我国现行规范对此类构件冲切承载力计算方法提出修正建议。以纤维体积掺量(0%、0.1%、0.2%、0.3%)与纤维长度(12 mm、18 mm)为变量,对7个混凝土板试件进行冲切试验,研究各参数对试件极限承载力的影响,建立经试验验证的有限元模型并进行扩参数分析。结果表明:玄武岩纤维混凝土板的极限承载力随体积掺量的增加呈先增大后减小的趋势,掺入长度为12 mm、18 mm的玄武岩纤维的试件较对比试件冲切承载力提升显著,最大提高幅度分别为40.9%和37.3%;纤维长度为12 mm,体积掺量为0.4%时,对混凝土板的抗冲切性能改善效果最佳。我国《混凝土结构设计规范》(GB 50010—2010)的冲切承载力计算值较试验结果偏于保守,考虑玄武岩纤维阻裂作用对临界截面周长的影响,对规范中的冲切承载力计算公式进行修正。     

基于DeformS9厚钢板小孔冲裁过程模拟及参数优化

利用计算机数值模拟软件DEFORM2D,对厚钢小孔冲裁（t〉4,d／t≤1）过程进行模拟与分析,得出了其断裂与变形机理。通过DEFORM3D进一步优化成形参数,得出了间隙对厚钢板小孔冲裁力的影响规律,为提高厚钢板小孔冲裁模的寿命提供了理论依据。     

铝箔哑光面等离子清洗对铝塑膜外层性能的影响

通过对铝箔哑光面进行等离子清洗,考察了铝箔哑光面经过等离子清洗后对铝塑膜外层粘结性、冲深性、耐湿热性能等的影响.结果表明,经过等离子清洗的铝塑膜外层粘结性能优于未经等离子清洗的样品,而冲深性能和耐电解液性能没有明显差别.在不同清洗功率下,120 W/(min·m2)时外层粘结性能最佳,而冲深性能和耐电解液性能没有明显差...     

Structural improvement of strengthened deck panels with externally bonded plates

Concrete bridge decks require eventual replacement and rehabilitation due to decreasing load-carrying capacity. This paper compares different strengthening design procedures that improve the usability and structural performance of bridge decks. The failure characteristics of bridge decks strengthened with various materials such as carbon fiber sheet, glass fiber sheet, steel plate, and grid CFRP and GFRP are analyzed, and the theoretical load-carrying capacities are evaluated using traditional beam and yield line theory, and punching shear analysis. The strengthening materials increase the punching shear strength of the deck and change the failure mode of the strengthened panel.     

橡胶垫冲边机结构分析与虚拟设计

对橡胶垫冲边机的总体结构进行了研究；对橡胶垫定位、外边冲裁、中心孔冲裁、冲头的联动驱动及冲裁间隙进行了全面分析及设计。通过采用Pro／Engineer软件的零件参数化设计、零部件的装配及总体主机的动态模拟设计，使橡胶垫冲边机虚拟样机在计算机上进行了动态演示。实现了创新设计的参数化、可视化、可动化。     

Through‐thickness embossing process for fabrication of three‐dimensional thermoplastic parts

The standard embossing process is limited to the fabrication of surface structures on relatively large polymer substrates. To overcome this limitation, a hybrid punching and embossing process was investigated for through‐thickness embossing of three‐dimensional parts. The embossing tool included a punching head and to‐be‐ replicated features in the socket behind the punching head. The built‐in punching head facilitated a through‐thickness action and provided a closed‐die environment for embossing pressure buildup. The method was used to emboss multichannel millimeter waveguides which requires uniform edges and accurate dimensions. With a tool temperature of 140°C, an embossing time of 3 min and a total cycle time of 7 min, discrete 4‐channel waveguides were successfully embossed from a room‐temperature ABS substrate. A computer model was established to study the flow behavior during through‐thickness embossing. It was found that nonisothermal embossing conditions help confine the polymer in the cavity and reduce the outflow into the surrounding region, thus achieving complete fill of the cavity. POLYM. ENG. SCI., 47:2075–2084, 2007. © 2007 Society of Plastics Engineers     

汽车中控面板IMD成组模具设计

针对某汽车中控面板内饰件制程工艺需要采用模内装饰(IMD)工艺中的模内贴膜(IMF)技术被覆桃木纹理三维复杂曲面薄膜的生产要求,设计了成型所需膜预成型模具、预成型膜片冲裁模具、注塑模具3副组合模具。膜预成型模具应用热压与真空吸附的办法,将加热后的膜片紧贴于型芯镶件上而后成型;结合预成型膜片侧面需要卷边包胶的需要,设计了侧抽芯滑块+气缸组合机构方式的侧面裁切和正面冲切的预成型膜片冲裁成型模具;注塑模具采用热流道延伸嘴与冷流道潜伏式进浇三板模,模腔布局一模一腔,两次开模,水冷,顶出采用顶针和顶管联合顶出方式。膜片预成型模具有效地解决了膜片三维成型困难问题,预成型膜片冲裁成型模具有效地解决了IMD工艺中三维曲面包边冲切成型的难题。所设计的组合模具有效地提高了中控面板IMF产品的膜成型良品率,为同类产品的设计和生产提供了有益参考。