5.1 曲线的精度。.................................................................................................................................... 4 5.2 曲面的精度。.................................................................................................................................... 4 6 三维建模的通用要求...............................................................................................................................4 6.1 绘图单位............................................................................................................................................ 4 6.2 日期格式............................................................................................................................................ 4 6.3 图层设置............................................................................................................................................ 4 6.4 线型.................................................................................................................................................... 5 6.5 颜色.................................................................................................................................................... 5 6.6 文本字体和字符集............................................................................................................................ 6 6.7 引用集................................................................................................................................................ 6 6.8 部件属性............................................................................................................................................ 6 6.9 材料与质量特性................................................................................................................................ 8 6.10 原点和坐标系设置.......................................................................................................................... 8 6.11 视图.................................................................................................................................................. 8 6.12 应按规定的方式组织和显示数据：.............................................................................................. 8 6.13 其它.................................................................................................................................................. 8 7 文件目录与命名原则...............................................................................................................................9 7.1 文件目录............................................................................................................................................ 9 7.2 命名规则............................................................................................................................................ 9 8 三维建模的特征应用要求.....................................................................................................................10 8.1 特征应用的基本要求...................................................................................................................... 10 8.2 体素特征.......................................................................................................................................... 11 8.3 参考特征.......................................................................................................................................... 11 8.4 草图特征.......................................................................................................................................... 11 8.5 拉伸、旋转和扫描特征.................................................................................................................. 11 8.6 成形特征.......................................................................................................................................... 12 8.1 引用特征.......................................................................................................................................... 12 8.2 螺纹特征（Thread Feature）...................................................................................................... 12 8.3 倒角特征（Chamfer Feature）和倒圆特征（Blend Feature） .............................................. 12
UG 三维建模规范
目录
1 范围 ..........................................................................................................................................................1 2 规范性引用文件.......................................................................................................................................1 3 术语 ..........................................................................................................................................................1 4 三维建模的原则.......................................................................................................................................3 5 三维建模的精度要求...............................................................................................................................3