CATIA ,简易教学,快速入门 1_草图设计.ppt

草图设计Sketcher;课程介绍Course Presentation;目录Table of Contents;CATIA草图设计介绍Introduction to the CATIA Sketcher;草图设计器是一套帮助用户快速生成2D几何元素的工具。 The Sketcher is a set of tools to help the user quickly generate 2D Geometry. 设计完成的草图用来生成实体（Solid）和曲面（Surface）。 The completed Sketch can then be used to generate Solids and Surfaces 在草图设计器中，元素间定义的约束允许快速修改草图，因此草图设计器是建立实体（Solid）和曲面（Surface）的基础。 The capability to define Constraints between elements in the Sketcher allows for quick modification of the Sketch and consequently the Solids or Surfaces that are based on it. 其它一些工具，例如启发式约束可以让用户找到更多的设计途经。 Other tools such as Animate Constraints enable the user to explore design alternatives ;你可以在任何一个工作台中选择草图器（ Workbench）工具进入草图器 You can also access the Sketcher by selecting the Sketcher icon from any Workbench where it is possible to do a sketch;草图设计工具Sketcher Design tools...;退出草图Exit Sketcher 轮廓草图Profile 矩形，键孔，多边形... 圆，椭圆，圆弧Circles, Ellipse, Arcs... 样条曲线Spline 椭圆Ellipse 线Line 轴Axis 点Points... 倒圆Corner 导角Chamfer 修剪Trim options... 对称Symmetry 投影Projection 约束对话框Constraints dialog box 约束Constraint 自动约束Auto Constraint 驱动约束Animate Constraint;插入菜单或工具条 Insert menu or toolbars ;一旦选择了用于草图设计的支持平面,则此平面平行于屏幕显示 （确认激活以下设置 Tools+ Option + mechanical Design + Sketcher + Position sketch plane parallel to screen ） Once on the plane on which you want to sketch has been selected, it is displayed parallel to the screen (if Tools+ Option + mechanical Design + Sketcher + Position sketch plane parallel to screen is active); 草图是一个平面内一组2D元素的集合，一个平面可以支持几个草图。 The Sketch is the holding point for a group 2D elements on a specific plane. There can be more than one Sketch using the same plane as support. V-H 轴是草图的坐标原点0，0。 The V-H Axis is the 0,0 for the Sketch. 草图一般包括：轮廓（Profile），约束（Constraints）和尺寸（Dimensions） （尺寸也是约束的一种）。 Sketches generally consist of a Profile, Constraints, and Dimensions (a type of Constraint).;进入到草图设计工作平台。 Access the Sketcher Workbench;绘制简单草图Sketching Simple Profiles;网格/捕捉 Grid/Snap;为什麽设置工作模式 Why Sket