CATIA 曲面基础教程.ppt

1、1,线框和曲面设计基础,2,课程介绍,课程目标 在这个课程介绍如何创建线框和用线框和基本曲面特征装饰3维零件设计 New V5 users 需具备条件 Part Design, Sketcher,1 day,3,线框和曲面设计入门,熟悉线框和曲面设计工作台（Wireframe and Surface Design workbench） 用户界面,4,用户界面,5,线框造型,熟悉线框造型基础 创建点 创建线 创建平面 创建曲线,6,定义点对话框提供不同的方法创建点,1,点图标,2,选择点类型选项中的一个类型,3,输入点的信息在点定义框并且确认,对话框的内容随着点类型选项改变而改变,点 (1/2)

2、,点用来支持所有几何单元的创建并用来作为所有创建的参考,7,点 (2/2),Coordinates,On curve,On plane,On surface,Circle center,不同的参数或元素创建点 :,Tangent on curve,Point between,Several points on a curve,8,线定义对话框提供不同的方法创建线,1,点选图标,2,选择一个线类型选项,对话框的内容随着线类型选项改变而改变,3,输入线的信息在线定义框并且确认,线 (1/2),线可作为引导线，参考，轴，方向或加入创建其他几何元素,9,线 (2/2),Line Point-Point

3、,Line Point-Direction,Line Angle/Normal to curve,Line tangent to curve,Line Normal to surface,不同的参数或元素创建点 :,Bisecting line,10,平面定义对话框提供不同的方法创建平面,1,点选生成平面图标,2,选择一个平面类型选项,对话框的内容随着平面类型选项改变而改变,3,输入平面的信息在平面定义框并且确认,创建平面 (1/5),用平面作为参考元素去创建新的几何元素或切断元素,11,创建平面 (2/5),Offset plane,Plane parallel through point,

4、Plane with angle to plane,Plane through 3 points,Plane through 2 lines,Plane through point and line,不同的参数或元素创建平面 :,12,创建平面 (3/5),Plane through planar curve,Plane normal to curve,Plane tangent to surface,Plane from equation,Plane mean through points,Planes between two planes,13,创建平面 (4/5) : 在两平面之间生成多

5、平面,创建平面实例在两个平面之间 :,4 instances,14,创建平面 (5/5) : 多平面生成,通过一个存在的平面创建平面实例:,Origin,15,显示对话框，例如,1,点击图标选择曲线类型,2,3,输入曲线的信息在曲线定义框并且确认,曲线 (1/3),曲线作为引导线或参考创建其他几何元素或作为面的边界,16,曲线 (2/3),Curve projected onto a support,Combined curve,Reflect line,Intersection curve,Circles,创建不同类型曲线 :,Parallel curve,17,曲线 (3/3),Splin

6、e,Helix,Corner,Connect curve,Spiral,Conic,18,创建基本曲面,熟悉创建基本曲面 通过外形创建面 通过边界创建面 通过其他面创建面 创建放样曲面 从面抽取元素,19,通过外形创建面,一个闭合或不闭合的轮廓给定一根导线和一个面，或两根导线，可以创建一个扫掠面,一个闭合或不闭合的 轮廓给定一个方向和限制，创建一个拉伸面,给定一个旋转轴和角度可以创建一个旋转面,20,创建球体,21,通过边界创建面,The blend surface is created between two curves lying each on a support ; the evol

7、ution of the surface between the two curves is defined by parameters.,The fill surface is created between joined curves which may lie on a support ; the evolution of the surface inside the contour is defined by parameters.,22,从其他曲面创建曲面,You can create several offset surfaces at the same time.,The off

8、set surface is created from an existing surface, giving an offset value and a direction. The resulting surface is parallel to the initial one.,23,创建放样曲面,几个参数能建立定义放样曲面 :,Tangency,Guide curve,Closing point,Spine,Coupling,Limitation,Manual coupling,24,几何操作功能,修补元素 切割和修剪元素 从曲面提取元素 适用转换 推断元素 创建接近元素 创建阵列,2

9、5,修补元素,当合并几个曲面时修补操作可以填充间隙,用Join这个操作可以集合一个单一元素或几个相邻的曲面，几个相邻的曲线,分解一个多元素曲面或曲线到独立数据元,Split surface,Restored surface,恢复整个面即使面被多次修剪。 The restored surface is a datum element.,26,切割和修剪元素,修剪元素只可以保留每个元素的一部分,用一个或几个几何元素（Cutting elements）去切割另一个几何元素（Element to cut）,不论是否有支撑定义，切割和修剪都将被执行,27,从曲面提取元素,Face extraction,

10、Edge extraction,可以从一个曲面给予传播条件提取边界，曲面或曲线,Boundary extraction with limits,The Complementary mode option allows you to de-select the elements to extract and select the non-selected elements.,萃取一些元素,28,显示转换对话框,1,点击如何一个转换图标,2,3,输入转换的信息在定义框并且确认,转换 (1/2),Transformations are used to modify the size, locatio

11、n, orientation, etc. of a wireframe or a surface element.,一个操作可以同时转换几个元素,29,转换 (2/2),六种转换类型:,Translation,Rotation,Symmetry,Scaling,Affinity,Axis to Axis,30,推断元素,Finally you will define the type of continuity and transition.,First select the element boundary which will be extrapolated, then the eleme

12、nt itself.,You will then choose the extrapolation mode : length or limit.,You may have to extrapolate a curve or surface to extend it to other geometry and thus be able to later trim, split or intersect these elements.,31,创建接近元素,The original element is transferred to the Hide space.,You will select

13、the multiple element from which you want to create the Near element.,You will then select a reference element, i.e. a point located next to the entity to be defined as Near element.,Some construction elements are made up of several entities. You may need to use only part of a multi-entity element.,Y

14、ou can create near elements from sketches or surfaces.,32,创建阵列,Reference element,Surface to pattern,You can create circular or rectangular patterns of wireframe or surface elements.,Element to pattern,Reference element,33,完成几何元素在零件设计工作台,通过曲面创建实体,34,For each type of feature a dialog box is displayed.

15、Select the surface to be processed.,1,Click on the appropriate Surface-Based Feature icon.,2,3,Confirm feature creation.,通过曲面创建实体(1/2),You may need to create a surface just for using it in a solid body. The surface is integrated into the body design.,35,通过曲面创建实体(2/2),Split Body,Thicken Surface,Close

16、 Surface,Sew Surface,Four ways of creating solids from surfaces are available :,36,修改几何元素,编辑元素,37,编辑元素,The surface is updated according to the new parameters.,You will modify the axis and the angle of revolution of this surface.,You can modify parameters either entering new values or making new sele

17、ctions.,You can edit elements after part creation to change some of the parameters and thus make a new version of the part.,38,工具运用,You will become familiar with some tools used for managing wireframe and surfaces. Stacking Commands Manipulating Elements Creating Datum Features Working on a Support

18、Updating a Part Selecting and Renaming an Open Body Moving an Element within an Open Body Applying Material onto a Surface,39,You define the parameters of the construction element.,Stacking Commands,While creating an element you may need a construction element that you will create on the fly.,The co

19、nstruction element is created and selected at the same time.,When using the stacking command capability you can check the status of the stack in the Running Commands window.,Stacking commands allows you to create construction elements while creating an element which requires those construction eleme

20、nts.,40,Manipulating Elements,You will cut or copy one or several elements.,Then select the element after which you want to position the cut/copied elements and paste them.,or,You can also delete an element from the specification tree.,41,创建数据特征,Clicking on the Create Datum icon de-activates the His

21、tory mode.,You will then create the datum feature element, and finally modify one of its parents.,A datum feature is an element which has no link (history) with the elements used to build it (parent elements).,42,Working on a Support (1/2),You can select a plane or a surface to use it as a support f

22、or further element creation.,Support plane = YZWith the Snap to Point capability the created points are located at the nearest intersection of the grid.,Support surface = Extrude.1When you create a point after selecting the surface as a support the Point Definition window automatically displays the option On surface.,43,Working on a Support (2/2),Creating a Support from a Plane,Grids are persistent, they are added to the specification tree.,To deactivate the current grid :,With the contextual menu,or using the Working Support Activit