模具标准化和基于UG的模具标准件库的建立

介绍了模具的标准化、标准件和ＣＡＤ标准件库，分析了标准与标准数值的选用，提出了基于ＵＧ的标准件库的建立原则和方法，在我厂实施应用并取得良好效果。     

关于汽车线束标准件的选型与应用

随着科学技术日新月异的发展,标准件在各种产品中所起的作用和功能越来越大。要提高生产效率和产品品质、降低成本,标准件也是一个重要环节。目前国内产品设计和生产部门选用标准件时基本上按照国家标准查找采用。但是由于标准件种类繁多,在纷繁复杂的标准件中挑选符合线束设计要求的那一个,需要耗费大量资源,为了避免资源浪费,降低成本,提高产品品质,在充分合理地使用国标件的前提下,充实和完善线束系统标准件的选型及建立企业自己的标准件选型规范也是一项很有意义的工作。     

汽车转向节热锻模的选材与复合强化处理

为提高汽车转向节锻模的寿命，选用３ＣｒＭｏ３ＶＮｂ电渣钢，采用复合强化处理工艺，使模具寿命提高１．５倍。     

快换模具标准件的结构特点及应用

本文主要介绍球锁紧凸模、凹模、固定座的结构及其在冲压模具上使用实例,旨在推进快换模具标准件广泛应用,提高模具有效使用率。     

黄海客车682前轴模具设计及工艺论证

针对前轴外形特点、合理地选择模锻工步，并对其模具进行合理化设计，以期提高模具寿命。     

汽车模具标准件浅析

对汽车模具标准件的结构进行分析,并结合模具设计、模具维修、标准件加工等几个方面因素,提出了汽车模具标准件的新结构。     

模具失效分析与延长模具寿命的方法

本文以介绍模具的失效形式及提高模具质量为主线，具体针对生产中模具的寿命及其失效形式，分析影响模具寿命的因素。提出提高模具寿命的方法。     

汽车紧固件不锈钢垫圈冷冲模的选材与复合强化处理研究

为改变原Cr12型电炉钢制不锈钢垫圈冷冲模使用寿命短，早期失效严重现象，选用DGJW45钢结硬质合金新型模具材料和硼-钒(B—V)复合强化处理，试验结果表明，模具寿命提高20-25倍。推广应用钢结硬质合金新型模具材料，创造可观经济效益。     

浅述我厂工模具制造的技术改造

本文阐明了工模具制造的重要性，介绍了汽车标准件生产厂家进行工模具制造技术改造的三个阶段和技改后效果。     

汽车覆盖件冲压模具材料的合理选用

以汽车覆盖件冲压模具材料的合理选用为主线,介绍了汽车覆盖件冲压模具材料选用的基本原则和选用方法,结合模具材料的化学成分、组织和性能等方面阐述了SKD11、ICD5、GM241三种汽车覆盖件冲压模具材料的不同特性,找出了SKD11、ICD5、GM241三种模具材料在汽车覆盖件冲压模具的适用范围。     

一种汽车外饰双色零件注塑模具设计与研究

以某车型汽车双色前大灯装饰盖为例,通过对零件结构进行改进、优化,相应注塑模具结构进行改进,采用合理的模具结构设计方案,提出了倒装双色注塑模具新方案,从而解决了该零件可以实现双色注塑生产。     

Design optimization of an injection mold for minimizing temperature deviation

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.     

Design of conformal cooling channels for an automotive part

The cooling system plays a crucial role in determining the productivity and quality of an injection molding process. With the current growth of Solid Freeform Fabrication (SFF) techniques, mold designers have been striving for not only improvement in cooling system performance but also for a method to do so automatically. In this paper, a method is proposed for developing a conformal cooling system that facilitates uniform cooling over the entire mold surface with minimum cycle time. Based on the temperature distribution after the filling stage, the mold surface is split into zones which will be cooled by optimized subconformal channels obtained from the optimization process. The optimization process in which the objective function is stated as minimization of the cooling time with boundaries ensuring a realistic design will optimize the cooling system layout in terms of cooling channel size and location. Finally, all subcooling channels are combined to generate the entire conformal cooling system for the injection mold.     

水下边坡防护设计与施工

实际工程中常遇到需要水下边坡防护的问题,为此,介绍两种新型的边坡防护方法——模袋混凝土边坡防护和铰接式水工垫防护。模袋混凝土技术采用织物模袋做软模具,通过混凝土泵将砂浆或混凝土充灌进模袋成型,起到护坡、护底、防渗等作用。铰接式水工垫是采用高性能、绿色混凝土制成形状一致的块体,块体之间通过特殊的连接形成一个整体,来抵抗水流的冲刷,块体之间允许适当的位移和变形,从而使该种铺面维护系统具有高度的地形适应性。     

Gate shape optimization using design of experiment to reduce the shear rate around the gate

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%.     

钢模长期存放防锈蚀技术研究

文章针对目前混凝土管片预制企业普遍存在的存量钢模长期存放管理中遇到的问题：改制成本高、占用土地资源多、影响生产等，通过研究借鉴其他领域钢结构的存放防锈蚀保养现状与趋势，以船舶防锈涂料为切入点，综合国内外二次除锈方法，利用材料干燥快、机械性能好、耐热性能优异等特点应用于钢模长期存放防锈蚀中。填补了项目结束后的存量钢模的管理存在空白，并对其他钢设备如盾构机、铣槽机等提供了保养存放防锈蚀研究新方向。     

Fatigue life estimation of injection mold core using simulation-based approach

The purpose of this study is to present a simulation-based approach capable of predicting the fatigue life of a mold core with the help of CAE technology based on injection molding simulation, core stress analysis and fatigue life prediction. Injection molding simulation is performed in order to obtain the non-uniform pressure acting on a mold core due to the polymer melt flow during injection molding process. Subsequently, the melt pressure profile is used as loading condition for core stress analysis via one-way coupling technique. The lifetime of a mold core is then predicted by fatigue analysis with stress-life approach. For verification of simulation-based approach to the fatigue life prediction, tests were also performed.     

轿车覆盖件冲压生产线设计及质量控制

轿车覆盖件冲压是轿车制造的重要生产过程,也是轿车生产质量控制的重要环节。本文介绍了国内外轿车企业模具规划、覆盖件模具设计制造,覆盖件冲压生产线工艺设计和覆盖件产品的质量控制方法。     

矮支架在盖挖逆作地铁车站中的应用

在盖挖逆作车站施作过程中,水平结构板作为水平临时支撑结构和永久结构,其施工质量直接决定基坑的安全,其外观质量也直接决定车站的整体形象。为了解决水平结构板采用的地模使得混凝土表面缺陷较多,且地模混凝土易与结构混凝土粘结一起不易脱落等问题,现场采用矮支架搭设模板。通过在深圳地铁车公庙枢纽工程中矮支架模板的实际应用,总结得出如下结论:1)采用矮支架模板可有效保证浇筑混凝土外观质量;2)模板表面比地模法施工不容易受污染;3)矮支架搭设过程灵活多变,可有效控制混凝土外观形状;4)易脱模,安全性高;5)当地质条件软弱、结构板形式复杂时,矮支架模板更能适应快速施工要求,解决地模法施工难度。     

Atos蓝光扫描技术在轻量化车身覆盖件模具设计中的应用

简述蓝光扫描系统,针对轻量化车身覆盖件越来越高的要求,利用Atos蓝光扫描技术对试模件和试模完的模具腔体数据测量,完成数据的处理和评估.再根据数据重新曲面重构得到我们理想的模具.最后总结蓝光扫描技术对模具设计行业的意义.