【作者】 宋丹路；

【导师】 殷国富；

【作者基本信息】 四川大学 ， 机械制造及其自动化， 2001， 硕士

【摘要】 随着社会进步和人们生活水平的不断提高，如何使卫生瓷产品在品种、质量诸方面满足现代社会的需要是卫生陶瓷工业发展的关键。目前，在国内卫生陶瓷产品设计完全是依靠设计人员的经验和技巧进行人工设计，设计工作量大、周期长，不能适应市场需求。国外也未见相应的商品化软件投放市场。因此，在卫生瓷产品设计中将经验的手工设计转变为有一定理论指导的CAD无疑具有重要意义。 本文在研究现代CAD技术与工程分析方法在卫生陶瓷产品设计中的应用的基础上，针对卫生陶瓷产品设计的特点以及按照面向应用、面向用户的原则，分析了卫生陶瓷产品的设计方法，建立了卫生陶瓷产品CAD系统(SC-CAD)的总体结构模式。应用基于特征的三维实体建模技术，针对卫生陶瓷产品复杂的结构特点，提出将其划分为多个功能部件，对各部分按照一定的次序分别进行参数化造型的方法。文中论述了三次Bezier曲线表示圆弧段的方法，在程序设计中实现了通过控制点调整曲线形状的方法。在分析DXF、WRL文件结构以及OpenGL对复杂曲面的显示方法基础上，给出了读取三角形面片各项数据的算法，详细介绍了法向量的计算方法，并且提供了运行实例。该方法在虚拟设计以及系统仿真领域都有重要的使用价值，根据计算机技术的发展，提出了“自由设计”的思想，并探讨了在SC-CAD结构中添加代理Agent，使SC-CAD具有有限协同设计能力的可能性以及相关技术。 在分析对比各种开发工具的基础上，采用面向对象的设计方法，以VC++ 摘 要作为程序设计平台，以ADSRX技术为开发工具，完成了系统中若干模块的程序设计工作。通过分析MDT3．0菜单文件的结构，提出了定制MDT系统界面及汉化的方法。作者开发的适用于卫生陶瓷产品设计的CAD系统具有三维实体造型设计（包括交互式、参数化造型人三维造型着色渲染、三维实体到二维图形转换、二维图纸尺寸标注、图形输出及流道优化分析等功能，系统集成化较高。 “本课题已通过部级鉴定，国家建材局咸阳陶瓷研究设计院用本系统完成了多套卫生陶瓷产品设计，使用效果良好。更多还原

【Abstract】 With the progress of society and standard of living, it is the key of developing sanitary products industry that how to make sanitary products meet modem society at some aspects, such as variety, quality etc. Now. in China, the design of sanitary products depends on the experiences and skills of designer, this will take longer time and can’t suit for the need of market. Moreover, there is no such commodity software in other countries. So. it will be of great significance in this profession to change the skilled manual design to CAD system with theory instruction.On the basis of research on the using of modern CAD technology and engineer analysis method at the design of sanitary ceramic products, according to the design character of sanitary ceramic products and the principia of reality-oriented and user-oriented, the design method of sanitary ceramic products are discussed and the whole design structure mode of sanitary ceramic products (SC-CAD) is presented. According to the complicated structure feature of sanitary ceramic products, 3D solid modeling technology based on the feature is introduced into the SC-CAD. The method of dividing sanitary ceramic products into some parts and the parametric modeling of each part in specific sequence is presented. The method of describing the arc with cubic Bezier curves is presented. In the program, the method of adjusting the curve by changing the control points is realized. On the basis of the analysis on the file structures of DXF, WRL and the way to display complicated curves in OpenGL, the arithmetic of reading the datum of triangle surface and the numeration of normalvector are presented. The method is of great value in virtual design and system simulation. Moreover, for fitting the development of modern computer technology, the thought of free design is discussed. The probability and some correlative technology about the SC-CAD structure based on agent are discussed. This structure can make SC-CAD have some capability of cooperated design.On the basis of analysis on some develop tools, using the O-O program design method, taking the VC++ as develop platform and ADSRX as develop tool, I successfully write the codes of some system modules. After the menu file structures of MDT3.0 are analyzed, the way to make and translate the interface of MDT system is presented. The SC-CAD developed by author is suitable for the design of sanitary ceramic products, it includes 3D solid modeling design (interaction modeling, parametric modeling), 3D model rendering. 3Dmodel to 2D drawing, 2D dimension, export drawing files, pipes" analysis and optimum design etc.This project has been expertized by experts of National Building Material Bureau(NBMB). The SC-CAD system is tested by XianYang Ceramics Research and Design Department, and the result is satisfied.更多还原