ISO 10303-204:2002 工业自动化系统和综合-产品数据表示和交换 第204部分：应用协议：使用边界表示机械设计

标准编号：ISO 10303-204:2002

中文名称：工业自动化系统和综合-产品数据表示和交换 第204部分：应用协议：使用边界表示机械设计

英文名称：Industrial automation systems and integration — Product data representation and exchange — Part 204: Application protocol: Mechanical design using boundary representation

发布日期：2002-08

标准范围

ISO 10303-204:2002规定了在机械工程设计环境中使用和交换边界表示实体模型的范围和信息要求所需的集成资源的使用。本文档描述了用于在计算机辅助机械设计过程中生成和交换基于体积的设计数据的应用参考环境，以及适当的数据模型和物理文件实现形式。信息模型支持对象的形状和大小的完整描述的所有几何和拓扑方面。它最初是为使用CAD建模技术边界表示（B-rep）实体建模的机械工程设计中的应用而开发的，并且可能适用于使用该技术的其他应用领域。以下内容属于ISO 10303-204:2002的范围:用于表示形状的三种类型的B-rep模型:分面B-rep模型；具有基本曲面的B-rep模型；具有雕刻表面的B-rep模型；曲线和曲面几何；参数空间中定义的曲线（pcurves）；流形拓扑；产品标识信息；诸如线样式、线宽、颜色的简单呈现属性与整个B-rep模型的关联，或者与B-rep模型的几何或拓扑元素的关联；保存用户定义的对象名称；与几何元素相关联的单位和度量；零件和子组件的组件。以下内容超出了ISO 10303-204:2002的范围:其他类型的形状表示:线框模型；表面模型；几何修剪的曲线和曲面；建设性立体几何模型；复合B-rep模型。几何和拓扑数据:2D几何，除了用于pcurves的定义；自相交几何；非流形拓扑。尺寸标注；公差；制造信息；高级演示功能，如多视图、字符字体和符号。

ISO 10303-204:2002 specifies the use of the integrated resources necessary for the scope and information requirements for the use and exchange of boundary representation solid models in the mechanical engineering design context.This document describes an application reference environment for the generation and exchange of volume-based design data in the computer-aided mechanical design process, together with appropriate data models and a physical file implementation form. The information model supports all geometric and topological aspects of a complete description of the shape and size of an object. It was originally developed for applications in mechanical engineering design using the CAD modelling technique boundary representation (B-rep) solid modelling and may be appropriate for other application areas using this technique.The following are within the scope of ISO 10303-204:2002:

• Three types of B-rep model that are used to represent shape:
  1. faceted B-rep model;
  2. B-rep model with elementary surfaces;
  3. B-rep model with sculptured surfaces;
• curve and surface geometry;
• curves defined in parameter space (pcurves);
• manifold topology;
• product identification information;
• the association of simple presentation attributes such as line-style, line-width, colour with an entire B-rep model, or, with geometric or topological elements of a B-rep model;
• preservation of user-defined names of objects;
• units and measures associated with geometric elements;
• assemblies of parts and sub-assemblies.

• Other types of shape representation:
  1. wireframe models;
  2. surface models;
  3. geometrically trimmed curves and surfaces;
  4. constructive solid geometry models;
  5. compound B-rep models.
• Geometric and topological data:
  1. 2D geometry, other than for the definition of pcurves;
  2. self-intersecting geometry;
  3. non-manifold topology.
• Dimensioning;
• Tolerances;
• Manufacturing information;
• Advanced presentation features such as multiple views, character fonts and symbols.

标准预览图