共查询到19条相似文献,搜索用时 156 毫秒
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成组技术在产品快速设计系统中的应用 总被引:2,自引:0,他引:2
以车床设计为例,提出了基于成组技术进行产品快速设计的基本思想和设计方法,将成组技术应用到产品的三维设计中,根据拟定的设计相似性标准,将设计产品的零部件分类成组形成设计族;针对不同的设计族,建立起能够集中全族所有功能要素的实例模型,并根据企业标准对其进行标准化处理,建立带有成组编码信息的三维模型实例库,供技术人员在设计时检索、编辑、修改,在此基础上形成新的设计,从而提高企业的设计效率和设计水平。 相似文献
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成组技术的应用大大提高了社会工作效率。尤其在机械行业,成组技术的发展日新月异。随着现代CAD技术的发展应用,具有强大的参数化设计功能的各种CAD应用软件使成组技术如虎添翼,设计和制造领域中得到了更加广泛的应用。CAD其强大的参数化建模功能,能够很好反映成组设计意图,参数化模型易于修改。本文以UGNX为支撑平台,介绍了用三维参数化建模实现成组设计的基本思想和实现方法,结合六角螺母实例分析了三维零件成组设计的设计过程,并创建了一个简单的成组零件库。 相似文献
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成组技术在工艺工作方面主要是将已经编码的不同产品的各个零件分类归族、设计零件特性矩阵、建立生产单元(或成组流水线)、安排机床平面布置、设计成组工艺(包括调整工艺)、研制成组夹具和成组机床等。 一、零件编码及分类归族、矩阵 我们以一机部“JCBM”法则为兰本对厂内3个 相似文献
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一、前言 在我厂最近研制开发的一个新产品冲模设计中,我们试用了成组技术理论。具体步骤为:首先用视检法将所有零件根据其结构及工艺过程的相似性分类成组,然后将成组的各“加工族”分别进行冲模设计。下面以“圆筒形拉伸零件加工族”的成组冲模设计做一介绍。 相似文献
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基于PDM/3D CAD集成系统的产品族设计 总被引:2,自引:0,他引:2
分析了PDM/3D CAD集成系统的产品族设计过程,将其划分为产品族模型建立阶段、客户需求提取分析阶段、设计实例获取阶段和设计评价与优化阶段。建立了基于事物特性表的产品族信息模型。采用基于代理的异构系统间的互动集成方式,实现在PDM/3D CAD集成系统下的基于三维模型的产品族设计。 相似文献
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一、成组夹具的特征 1.什么是成组夹具成组夹具是根据成组技术的原则、专为一组或一族相似零件设计的,是由通用基体和可换或可调整元件组成的一种夹具。成组夹具与专用夹具或组合夹具是有区别的。成组夹具本身从属于通用可调整夹具的范畴,它的适用对象是按成组技术原则,经过比较严格划分的一组或一族的相似零件,并应按这些组进行投产。专用夹具 相似文献
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针对目前冲模标准件数据库缺乏的问题,以CATIA为二次开发平台,采用参数化的设计方法,建立了三维冲模标准件库系统,实现了三维冲压模具标准件的参数化自动建模,提高了模具设计的工作效率,缩短了模具新产品的研制周期。 相似文献
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传统的商用软件二次开发模式难以满足钣金设计的灵活性和交互性要求,基于造型内核开发三维设计环境是可行的方案。在分析OpenCASCADE三维造型内核的开发模式和数据结构的基础上,将钣金展开方法与OpenCASCADE相结合,使用VC++开发出三维钣金设计系统。针对常用钣金件展开方法建立了数学模型,以模型数据和算法为基础,调用OpenCASCADE造型函数,实现了底层数据与显示模块的融合。无论在设计灵活性还是系统扩展性方面都优于传统的商用软件二次开发模式。 相似文献
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从PDM读取和管理产品以及生产过程的三维信息的重要性出发,分析了开发三维浏览器的必要性;通过对DXF文件的分析,提出了采用SQLServer数据库来存储DXF的几何信息,以供OpenGL进行三维方针的设计思路,并给出了系统的总体结构框架和设计方法。 相似文献
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Janus S. Liang 《The International Journal of Advanced Manufacturing Technology》2007,34(5-6):617-630
Information technologies and the web are challenging, and changing theway industry works. It is believed that web-based 3D
interface can be applied to strengthen the interactive visualization and manipulation of products. In this research, a web-based
3D virtual technologies for developing product information framework is applied in automotive electric system. It is very
convenient to share with different partners (e.g., co-designers, manufacturers, customers, etc.) via the web for viewing the
aesthetic functions, and verifying its related design functions. The overall procedures are listed: First, build CAD models
of automotive electric system (including assemble parts and their components) through CAD system, then store them in a relational
database. Second, transforming the CAD models users click into virtual reality modeling language (VRML) objects, it can be
visualized graphically and animated interactively using a web browser with a VRML plug-in. Finally, operate the VRML objects
by Java Language for the different purposes. Due to the technologies that are applied, many interactive modes are generated
in cyberspace. Displaying the exploding process of 3D assemble part on the browser, assigning any component of assemble part
through the mouse chick directly to display design details, e.g., dimensions, tolerances, datum planes, material, other references,
etc. by retrieving the corresponding data from database, and building 2D projected views automatically follow the 3D viewpoint
that users assign. 相似文献
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Heng Wang Ruxin Ning Yan Yan 《The International Journal of Advanced Manufacturing Technology》2006,29(9-10):1019-1025
In current research of computer aided tolerancing (CAT), how to build models with tolerance and how to generate 3D dimension chains automatically have been tough problems and still unsolved. This paper builds a simulated toleranced CAD geometrical model (STCAD model) based on the feature-based original idealized CAD geometrical model (OICAD model), which can simulate real parts with manufacturing dimension errors from different aspects. Further more, an automatic generation method of 3D dimension chains based on some newly proposed definitions is put forward. In this method, firstly the conception of part instantiation (PI) is realized, secondly performance feature is defined, thirdly through building STCAD models, drive dimensions can be obtained which are vectorized to build drive dimension skeleton model (DDSM), and finally 3D dimension chains can be obtained by DDSM and the method of space projection. This method can generate 1D, 2D, and 3D dimension chains of parts or assemblies. It is verified in our own-developed automatic generation system of 3D dimension chains . 相似文献
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S.K. Ong D.O. Guo 《The International Journal of Advanced Manufacturing Technology》2006,27(5-6):462-467
This research presents an online Web-based environment for the reuse of detailed design. In this environment, users can browse
existing product databases including all related product information and graphic displays of the geometrical models, search
and retrieve related products and generate new designs from existing products. In the underlying database, product data are
clustered into product families to facilitate data management and reuse, and the variant method is adopted to transform an
existing design into a new design. 相似文献