A Parametric Drawing System Of Large Injection Mold Base

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.