GHCAD：一个产品模型为基础的CAD／CAM集成系统

ＳＴＥＰ是关于产品数据表达和交换的国际标准，如何将ＳＴＥＰ的方法和规范应用于系统开发是解决计算机集成制造系统（ＣＩＭＳ）开发的关键问题之一。集成化ＣＡＤ／ＣＡＭ系统是ＣＩＭＳ的核心，实现将ＣＡＤ的工程设计功能和ＣＡＭ的制造功能的结合。本文介绍一个产品模型为基础的ＣＡＤ／ＣＡＭ集成系统－ＧＨＣＡＤ。系统采用ＳＴＥＰ的数据交换、建模思想，以产品模型为核心，通过ＳＴＥＰ的标准数据接口ＳＤＡＩ实现了系统的集成。

GHCAD:AN INTEGRATED CAD/CAM SYSTEM BASED ON PRODUCT MODEL

STEP is the international standard of representation and exchange of product data.How to make practical use of methodolgy and stadard of STEP in development of the system is one of the key problems of compputer integrated manufactureing system(CIMS). The integrated CAD/CAM system is the kernel of CIMS, it implements the junction of design and manufacturing of CAD and CAM.In this papaer,a product model based integrated CAD/CAM system-GHCAD, is introduced. Taking the unified product model as the core,and through SDAI of STEP, the integration is achieved by using STEP in the system.