基于模块化的冲压模具CAD系统开发

模块化设计技术可以缩短产品的设计与制造周期,是快速响应设计的核心。文章从冲压模具的模块化设计方法出发,分析了冲压模具的结构和设计特点,论述了基于模块化的冲压模具功能零部件的规划、基于模块化的冲压模具设计过程。最后给出了冲压模具CAD系统的功能结构,并对其具体功能进行了描述。冲压模具CAD系统应用模块化技术可以优化模具的设计与制造,提高模具设计的标准化水平及快速响应能力。     

混泥土空心护坡砖模具设计

通过对混泥土空心护坡砖模具的设计实例,探讨了砌块模具的设计方法、要点,详细介绍了砌块模具的关键部件——模腔的选材及热处理,以提高模具质量的长期稳定性,为砌块模具的设计提供了重要的成功经验。     

铁路货车横梁腹板冲断冲孔模设计

阐述了横梁腹板冲断冲孔模的设计思路及模具结构,介绍了模具零部件设计及保证模具安全性的具体措施,介绍了模具投产后的使用效果。     

望远镜壳体注射模设计

以滑块中加脱螺纹模具机构设计的方法,利用模具中的行程开关,解决了模具的脱模具问题,使模具生产的塑件符合塑件设计的质量要求,从而证明滑块中加脱螺纹模具机构设计的方法是正确的。     

铁路货车底门板冲孔落料模设计

阐述了尺寸较大冲压件落料冲孔的设计理念。设计了1副复合模完成冲孔和落料,保证模具生产的工件具有互换性,保证模具设计基准与零件设计基准和制造组装基准的统一和匹配,实现批量生产的需求;降低模具的冲裁力,实现安全生产;设计模具的柔性结构,能快速更换模具的备件;探讨模具的新结构,提升了模具的安全性。     

16J轮辐冲孔落料模设计

介绍了16J轮辐冲孔、落料模的设计及制造新思路。该模具结构合理,使用方便,满足轮辐模具生产要求。同时该模具独特的凸、凹模镶块组合设计,满足了模具制造工艺要求,使模具加工方便,且省时节料,不仅降低了模具成本,还保证了模具精度要求。     

汽车覆盖件模具型面设计方法的研究

覆盖件模具工艺设计过程中模具型面设计是能否设计出合格工序件的关键。本文研究了覆盖件模具型面的设计方法和设计原则，分析了现有设计方法的优点和不足，在此基础上，采用知识工翟方法应用于模具型面设计中，建立了基于知识的模具型面设计流程，提出基于模板的全参数化工艺补充面截面线设计方法，用承载了工程约束的截面线和控制线控制生成工艺补充面和压料面，实现了知识驱动的模具型面设计，提高了覆盖件模具工艺设计的自动化程度和智能化程度。     

电梯按钮级进模设计

分析了电梯按钮的成形工艺,确定了零件排样设计、模具结构及模具的工作过程。结合排列组合原理,优化了模具结构设计。设计的模具可实现多种零件成形,降低了产品成本,提高了经济效益。     

银带熔体片多品种冲孔模设计

介绍了熔体片冲孔模结构及主要零件的设计,设计了符合冲压工艺的多品种模具结构,分析了模具关键零件的设计和制造,并考虑了模具的镶拼结构及模具中使用反推杆结构,保证了细小凸模的刚度不受影响,提高了整副模具的使用寿命,同时设计了送进和取出熔体片的工位器具,获得了满意的使用效果。     

汽车行业冲压成本的控制方法

介绍了模具轻量化设计,模具国产化的提升,少工序化设计,模具寿命差异化设计,降低冲压材料成本等方法,使得汽车行业冲压成本得到控制。     

基于CimatronE的现代模具制造技术实例

以拉把型腔模具为例,着重介绍了CimatronE软件在模具制造中的数控加工工艺规划、刀路合理选择和加工参数设置以及难加工部位的电极设计等关键技术,给出了模具型腔零件的完整制造过程。对现代模具合理设计和优化具有借鉴作用。     

汽车散热器主片冲压工艺与模具设计改进

针对汽车散热器主片技术和工艺要求,不断完善和优化冲压工艺和模具结构,通过对原模具生产的产品质量的研究,提出了更加合理的冲压工艺与模具设计方案。     

流动模拟技术在洗衣机面板模具设计中的应用

通过实例介绍了注射模具设计过程中注射过程模拟技术的作用和技术途径 ,以及采用流动模拟技术进行模具流道系统和冷却系统设计方案的评估和优化的方法 ,提出了在模具设计阶段利用CAE技术辅助注射工艺设计的方法     

机芯支架翻边弯曲模设计

通过对某轿车音响机芯支架零件的结构及工艺分析,阐述了该零件的冲压工艺和模具设计要点,设计了滑块式翻边弯曲模结构及模具主要零部件。实际应用表明:设计的冲压工艺方案合理,模具结构型式新颖、实用可靠。     

A functional approach for the formalization of the fixture design process

The design of machining fixtures is a highly complex process that relies on designer experience and his/her implicit knowledge to achieve a good design. In order to facilitate its automation by the development of a knowledge-based application, the explicit definition of the fixture design process and the knowledge involved is a prior and a fundamental task to undertake. Additionally, a fundamental and well-known engineering principle should be considered: the functional requirements and their associated constraints should be the first input to any design process. Considering these two main ideas, this paper presents the development undertaken to facilitate the automation of the fixture design process based on a functional approach.In this context, the MOKA methodology has been used to elicit fixtures knowledge. IDEF0 and UML have been used to represent the fixture design process. A methodology based on the function concept and aiming to formalize such design process is proposed. Fixture functional requirements have been defined and formalized. Functional fixtures elements have been used to create a functional design solution, the link of these elements with the functional requirements and with typical commercial fixture components has been defined via tables and rules mapping. And finally, a prototype knowledge-based application has been developed in order to make an initial validation of the proposed methodology.     

变矩箱前壳体压铸模设计

通过分析变矩箱前壳体的压铸成型工艺,确定了模具结构设计方案。为了便于安装和固定嵌件,采用型腔倾斜结构;为了模具的制造与检验,将模具镶块基准做成同等倾斜使镶块尺寸与产品尺寸基准一致;为使定模顶出机构安装便捷、占用空间小,使用了碟形片组合弹簧顶出的新型结构。模具结构设计改善效果显著,生产实践证明模具设计是成功的。     

曲轴TR镦锻模具CAD／CAE系统开发与应用

开发了一个曲轴TR镦锻模具CAD／CAE系统,该系统的功能包括锻件设计、毛坯设计、模具设计、图纸输出以及与CAE软件的接口。介绍了系统开发的流程及方法。系统开发的关键技术包括建立参数化图库、图形自动绘制和成形过程模拟等。作为应用实例,采用该系统完成了某型号曲轴的全部设计流程,通过对曲轴锻造过程的有限元模拟优化了毛坯尺寸,从而验证了系统的可行性。     

排辊成形工艺参数化设计系统集成开发技术

排辊成形是利用若干组小排辊将带钢续弯卷成管筒的一种辊式成形工艺,是制造焊管的重要加工技术。现代的排辊成形工艺设计涉及到CAD,CAE和知识管理等多个方面的技术,技术平台的集成至关重要。本文以Visual Basic为开发平台,利用Visual Basic与ACCESS数据库、MATLAB与ANSYS的接口技术,将参数设计、有限元模拟和知识管理集成,开发了直缝焊管排辊成形工艺设计系统。通过该系统可以实现直缝焊管排辊成形过程的工艺参数管理、机组的轧辊设计、花型设计、工艺参数设计以及CAD/CAE建模仿真。该平台可以为工程人员进行直缝焊管工艺设计提供重要参考。     

Prognosis of the local tool wear in gear finish hobbing

Gear finish hobbing is a method for soft finishing of external cylindrical power transmission gears. The application of this process is required when the process chain of gear production is to be set up completely free of coolant. Since this finishing technology is relatively new, there is some practical experience, but no fundamental knowledge regarding economical process design. One challenge in process design is that unbalanced tool wear typically leads to geometrical deviations of the machined gear profile. The aim of the investigations described in this paper is to develop a wear model which is capable to predict the local tool wear of gear finish hobbing tools. This model is based on analogy cutting trials and geometrical analyses of the chip geometries in gear finish hobbing. The results of the model are validated by fly-cutting trials with different local loads on the tool. The validation shows that an optimization of the local tool wear development can be achieved by means of the prediction model. Therefore, an optimization of the technological process parameters can be carried out based on this model to reach an efficient process design.     

A knowledge-based computer tool for casting process design

When designing a manufacturing process, the goal is to cost-effectively produce a high-quality product. In casting, the aim is to generate an optimized process design that can produce a defect-free part as inexpensively as possible. Optimization of process design is an iterative process where an initial design is updated in the light of analysis. A good initial design would reduce the number of cycles in a process optimization. The work described in this article focuses on the development of a computer system that generates an initial design. The main philosophy of this system is based on the observation that a casting process design involves identifying features that are quantified in terms of attributes (e.g., thickness and location). The system operates on these attributes using process design heuristics to arrive at an initial design.