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本章概述
通常情况下,三维实体模型的设计应该从草图设计开始。二维草图设计是创建许多特征的基础。例如,在创建拉伸、回转和扫描等特征时,都需要先绘制所建特征的截面形状,其中的扫描特征还需要通过绘制草图以定义扫描轨迹。对于三维模型的再修改,可以只修改草图,相关的三维模型即可自动进行更新。本章主要介绍Creo Parametric 3.0中的草绘基本环境,基本草绘工具的使用方法以有相关的草图几何关系和尺寸标注等内容。
·通过本章的学习,读者需要掌握的内容如下:
·草图的创建、草图环境的进入与退出
·草图管理的相关操作、草图环境的设置
·草图绘制
·草图的编辑
·草图约束设置
·草图的标注
2.1 草绘概述
草图是由点、直线和圆弧等基本几何元素构成的平面轮廓,用于定义特定的截面形状、尺寸和位置,并由此生成相应的实体特征。
·草绘环境
·草图环境的设置
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