箱体特征造型系统研究及应用

【作者】 蒋建东；

【导师】 师帅兵；

【作者基本信息】 西北农林科技大学 ， 农业机械化工程， 2001， 硕士

【摘要】 现代设计制造系统的发展趋势是集成化、智能化、最终实现高度的自动化。这就要求产品模型必须信息化，要描述产品在其生存周期中各个环节的形态和性能。无论是从实现完全的CAD／CAM一体化，还是进一步满足整个生产活动的计算机集成化，基于特征（FEATURE）的技术都能满足系统对产品信息模型的要求。它己被公认为CAD／CAM集成化及CIMS的实现的核心技术之一。 本文主要研究了CAD／CAM集成工作中存在的信息共享问题，提出了一种基于Allt。CAD支撑平台建立特征造型系统的解决方法。根据特征建模的理论和方法，从应用角度出发，对箱体零件的特征进行了分析，并建立了规则箱体零件的特征库，提出了规则箱体零件特征的分类及特征之间的关系和零件特征的信息表达模型。与此同时，采用了特征编码技术对特征和方位面体素进行了编码，使零件具备了高层次语义信息。 本文以目前广泛使用的 AutoCAD R14为二次开发平台，利用 ObjectARX开发系统和AlltOCAD支撑平台对体素的各种操作功能，在实体造型的基础上创建产品的形状特征库，开发应用实例规则箱体三维特征造型CAD系统，并在产品的设计阶段，在完成产品的形状设计的同时也完成产品的特征信息的附加工作，以特征操作取代传统的基本体素的集合运算及局部操作，使对产品的信息描述能满足CAPP系统的信息要求，具有一定的实用价值。更多还原

【Abstract】 The deve1opmClltal direction of modem design and manufacture is integration,intelligentized and auomatic ultimately It requires the information of products modelmust be describe shaPe and performance during its exist. Whether integratingCAD/CAM or implementing CIM, featUr-based design contents the requirement ofinformation, Which the products model need. And people consider it as one of the keytechnique realizing the integration of the CAD/CAM and CIMS.The paPer mainly researches on the problem of information share in the CAD/CAMintegration; a method of building a featUre mode1ing system based on AutoCAD is given.Aiming at aPplication, It analyses the feature of box parts and establishes a regular box’feature database on the theory and method of featUre modeling, gives the classificationand relationship of box parts’ feature, proposes the information model of a regular boxparts. SynchrQnously, the tCcboque that aPplies feAn coding for feature and orientationsurface makes parts provides with suPemal signification.Base on the above work, again developing feature library serving the reducer boxparts on the p1atfOrm AutoCAD which is used Wdely by people, utilizing the developingtools ObjectARX and AatoCAD system which operates the entity in model to frame the3D feature modeling system. During design a regular box parts, aPpending themanufacture and process infOrmation illto feature in comPany with modeling theproducts shaPe. It is commonly practical idea that operating feature instead of operatingparts entity and local parts make products’ information sttuctuFe mect the requiremeni ofessential information that the CAPP system need.更多还原