【作者】 肖粲俊；

【导师】 郑忠俊；

【作者基本信息】 四川大学 ， 材料加工工程， 2007， 硕士

【摘要】 为响应国家“十一五”期间模具发展重点的要求，本课题针对国家标准塑料注射模大型模架，基于ObjectARX建立的二维参数化自动绘图系统技术进行了深入研究。在模具行业中，由于存在大量的通用件、标准件和系列化产品，参数化设计技术的应用，能显著地减少此类产品的重复设计。在CAD参数化设计系统中，绘图自动化是一项关键技术。它既能缩短设计周期，同时建立了标准的产品数据库，也能为后期的CAD与CAE和CAM的集成做出必要准备。AutoCAD在当今二维图形处理软件中，一支独秀，其优异的绘图功能和开放性的数据结构，为其它绘图软件所望尘莫及。同时，它还具有价格优势，是广大中小型企业最为青睐的CAD软件，以它为平台来实现本设计有着重大意义。据此本文开发塑料注射模大型模架的参数话绘图系统，主要成果和特色如下：1．在比较多种二次开发工具的基础上，选用ObjectARX作为对本系统AutoCAD二次开发工具。它采用面向对象的编程思想，共享AutoCAD的内存地址空间，生成动态链接库，具有强大的参数化开发功能。本文讨论了ARX开发环境设置、基本程序结构、图形数据库操作等功能。2．本文研究了二维参数化自动绘图的原理。整个系统贯穿了参数化设计思想。通过约束关系对设计参数分析，筛选出每类模架及其零件的主要结构参数。再用参数来设计每种图形的结构。3．根据设计要求，选用了Access作为该工程的数据库系统，通过参数确定，建立了相应的工程数据库。4．ODBC数据库技术。通过深入学习ODBC思想和结构，为工程添加数据源。再结合SQL语言，实现数据库的管理和数据库系统与参数化绘图系统的数据传递。5．以Visual C++6.0为开发平台，结合ObjectARX的类库，开发了一系列ARX的绘图和标注等功能函数。6．实现了注塑模大型模架装配图和零件图的自动绘制及自动标注。同时实现了绘制完装配图后，不需选择参数直接绘制其相应的零件图。本系统针对标准塑料注射模大型模架自动绘图的需求，结合CAD参数化理念，利用ObjectARX的类库开发而成。系统拥有良好的人机交互界面，操作简单，实现了标准塑料注射模大型模架自动出图，提高了设计效率。该参数化自动绘图技术也可应用于其它模具标准件中。由于基于平台较低的AutoCAD系统，价格低廉，容易被广大中小企业采用，很具有实用价值。更多还原

【Abstract】 To respond the demand of mode-industry-development in the "eleventh-five years plan" of our country. The objective of this paper is to study the 2D parametric drawing by means of ObjectARX for large injection mold base. In the mode industry, there are an amount of genaral-purpose parts, standarized parts and series products.The application of parametric design can remarkably reduce the repeating work in such products design. And in the parametric design system, automatic drawing is an important technology. Parametric design could decrease the design-period, and could build the standard products’ database, also it could prepare for the integration of CAD,CAE and CAM. As we know, AutoCAD is the best 2D drawing system amond the engineering drawing softwares nowadays. With its brilliant drawing perfomance and the opening data structure, AutoCAD has cheap price.It is the fashionest and most popular CAD software.So it is important to do the design base on the AutoCAD.I have produced the parametric drawing system by this thought.The primary achievement and feature of this paper are as fllows:1. After comparing with several CAD advanced developing tools,ObjectARX is choosed as the advanced developing tool in this system. It is object-oriented ,shares the memory with AutoCAD and is a dynamic linking libarary,so it has powerful function for parametric design.This paper has discussed about the ARX programming environment configuration,basic program structure,graphics database control and so on.2. The paper shows how the 2D parametric drawing works.The thought of parametric design has run through whole system.By the analyses of design parameters, the chief structural parameters of every kind of mold basese or parts. And use this parameters to design every kind of structures.3. Choose the Access as the database system according to the requirements of the design.After got the parameters, build the correspond project’s database.4. Open-DataBase-Connectivity technology.After studied the thought and structure of ODBC, add the database source for the project.Use the SQL langue to administer database and transmit data in the project.5. Based on Visual C++6.0 and combined with ObjectARX,develop a series ARX functions such as drafting tools and dimension tools to draw.6. The design realizes automatic drawing for large injection mold base and the data transmitting from assemblies to their according parts.This system satisfy the automatic drawing for standard large injection mold base, combination of CAD parametric design and using the ObjectARX’s classes. The system has a friendly user interface, is easy to operate and provides a convenient utility for the parametric drawing of large injection mold base system.Therefore,It improves the design efficiency. Meanwhile, the automatic drawing technology can be used by other standard parts of mold.Because it is cheap to get AutoCAD,this system is easy accepted by smaller factories,so it is worthy in production.更多还原