The next step is to arrange the block using grid line in 2D according to the design rules as mentioned before, and to select rule-base data management method in  order to decide the draw die type by die size and body panel shape。

There are four major functions in draw die design system。 They are 1) selection of components and their dimension and shapes from standard database, 2) determination of layout position, 3) construction of the relations among the components and geome- tries, and 4) modification of the parts and die size from the past design。 These pro- grams cover four different types of draw dies; three single action type (transfer, tandem, and cross bar) and one double action type。

Before deciding the height of components feature, user must decide shape checking interval of draw die in the product surface feature and pide surface shape and height of draw die according to the selected checking interval。 Positioning of each component is decided by this pided point and an intersecting point on 2-dimensional die shape。

The feature information of each components generated as a result of design and design parameters are stored in database and the system can retrieve the data in case of designing draw die with similar features and parameters to save time repeating the same design work。 [10-11]

3。5 Display of Design Information

The proposed system controls product design process in a viewpoint of design administra- tor and provide 2D user-interface to support the detailed concept design with automatic

3D component calculation。 Moreover, the system can provide user-friendly interface with graphics and charts and check design error caused by blunders in design step。

The system shows the design rules and design methods on the system-display panel and they can be corrected automatically using the built-in tool which can induce design data control module with design-object, design process and user-interface。 [10-11]

Also the shape and size of the designed block are illustrated as a 3D shape with the material table that includes all the necessary information in the design and production step so that the design results can be passed directly to the production step。

摘要 ：本篇论文主要介绍了汽车覆盖件冲压模辅助设计系统的开发。提出的这款辅助设计系统能够利用标准数据及反映冲压模设计的技术来高效系统地支持模具设计开发工序。那些技术和数据是通过对在韩国汽车制造业工作的设计专家采访而收集和积累的。这篇论文为冲压模的系统设计，尺寸规格的设定和供给工具的自动检测提供了一整套解决方案。除此之外，以规则为基础的设计系统是基于产品数据开发的，所有的冲压模元件都被当做产品数据。而且这些元件也被认为是冲压模具的单位。应用知识库和标准数据库的参数化设计的引进使得在处理复杂的技术时变得更加容易便捷。为了能够流畅运行，以规则为基础的设计系统应用C++和 Motif使其程式化，以便程序能够和CATIA进行链接。

1简介

随着近代汽车工业顾客需求的不断变化，缩短工业制造周期成为了一项重要的议题。尽管制造业已经采用了各种各样诸如CAD/CAM和工厂自动化的新技术，但结果并没有达到（缩短周期的）预期水平。主要原因在于新技术必须适用于企业自身的专有技术和知识的工作流程，而且还要适应一些特定公司的管理特性。文献综述

在修边模与拉延模的设计与制造过程中，汽车覆盖件的形状变化多样，结构的复杂性都使问题变得更加复杂。并且在设计过程中，缺乏（系统）连贯性也可能导致设计与生产之间的衔接变得薄弱，使得设计者在找出错误时出现困难。正是这些问题，浪费了大量的时间和资源。