工业自动化系统与集成 产品数据表示与交换 第113部分：集成应用资源：机械特征

[中文适用范围]： 本文件规定了机械特征的集成资源构造。以下内容在本文件的适用范围内：对拓扑项生命周期上下文不变标识符的约束；锪孔、沉头孔、锪钻孔和锪平面的描述及其应用；通过铣削或车削工艺制造的特征；可以在模式中复制的特征；通用机械设计概念；通过选择标准参数隐式表示加工特征；创建加工特征所需的定义元素；用于制造所需的形状定义的加工特征；三维几何模型中产品和制造信息的占位符；创建加工特征所需的形状表示。 [外文原描述]： This document specifies the integrated resource constructs for Mechanical features. The following are within the scope of this document: constraints on life cycle context invariant identifiers for topological items; counterbore, countersink, counterdrill, and spotface description and application; features that are to be manufactured by either milling or turning processes; features that can be replicated in patterns; generic mechanical design concepts; implicit representation of machining features through selection of standard parameters; machining feature definition elements necessary for creating machining features; machining features for defining shapes necessary for manufacturing; product and manufacturing information placeholder in a three dimensional geometric model; shape representations necessary for creating machining features.