冷冲模CAD对象数据模型的研究

STUDY ON OBJECT DATA MODEL IN CAD OF COLD PRESS DIE

本文提出的对象数据模型是将语义数据模型与面向对象概念相结合而形成，具有较强的语义功能，并使得数据库具有较好的开放性和可扩充性。应用这种数据模型设计的数据库能够较好地支持冷冲模ＣＡＤ系统工作。文章描述了对象数据模型的组成结构，语义关联和基本运算功能。

Object Data Model put forward in tills article is developed from sematic data model arid concept of object-oriented. It has strong ability of sematic handling and make the database have characters ofopenning and extending. Database formed on Object Daal Model can support the CAD system of Cold PressDie Perfectly. The structure, sematic relationship and element operation of Object Data Model are described in this paper.