CATIA曲面基础教程.ppt

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1、线框和曲面设计基础线框和曲面设计基础1课程介绍课程介绍课程目标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维零件设计维零件设计New V5 users需具备条件需具备条件Part Design,Sketcher1 day2线框和曲面设计入门线框和曲面设计入门熟悉熟悉线框和曲面设计工作台（线框和曲面设计工作台（Wireframe and Surface Design workbench）用户界面用户界面3用户界面用户界面4线框造型线框造型熟悉线框造型基础熟悉线框造型基础创建点创建点创建线创建线创建平面创建平面创建曲线创建曲线5

2、定定义点点对话框提供不同的方法框提供不同的方法创建点建点1点点图标2选择点点类型型选项中的中的一个一个类型型3输入点的信息在点定入点的信息在点定义框并且确框并且确认对话框的内容随着点框的内容随着点类型型选项改改变而改而改变点点(1/2)点用来支持所有几何点用来支持所有几何单元的元的创建并用来作建并用来作为所有所有创建的参考建的参考6点点(2/2)CoordinatesOn curveOn planeOn surfaceCircle center不同的参数或元素不同的参数或元素创建点建点:Tangent on curvePoint betweenSeveral points on a curve

3、7线定定义对话框提供不同的方法框提供不同的方法创建建线1点点选图标2选择一个一个线类型型选项对话框的内容随着线类对话框的内容随着线类型选项改变而改变型选项改变而改变3输入线的信息在线定义框并输入线的信息在线定义框并且确认且确认线线(1/2)线可作可作为引引导线，参考，参考，轴，方向或加入，方向或加入创建其他几何元素建其他几何元素8线线(2/2)Line Point-PointLine Point-DirectionLine Angle/Normal to curveLine tangent to curveLine Normal to surface不同的参数或元素创建点不同的参数或元素创建点

4、:Bisecting line9平面定义对话框提供不同的方法创建平面平面定义对话框提供不同的方法创建平面1点点选生成平面生成平面图标2选择一个平面一个平面类型型选项对话框的内容随着平面对话框的内容随着平面类型选项改变而改变类型选项改变而改变3输入平面的信息在平面定义输入平面的信息在平面定义框并且确认框并且确认创建平面创建平面(1/5)用平面作用平面作为参考元素去参考元素去创建新的几何元素或切断元素建新的几何元素或切断元素 10创建平面创建平面(2/5)Offset planePlane parallel through pointPlane with angle to planePlane t

5、hrough 3 pointsPlane through 2 linesPlane through point and line不同的参数或元素创建平面不同的参数或元素创建平面:11创建平面创建平面(3/5)Plane through planar curvePlane normal to curvePlane tangent to surfacePlane from equationPlane mean through pointsPlanes between two planes12创建平面创建平面(4/5):在两平面之间生成多平面在两平面之间生成多平面创建平面建平面实例在两个平面之例在两

6、个平面之间:4 instances 13创建平面创建平面(5/5):多平面生成多平面生成通通过一个存在的平面一个存在的平面创建平面实例创建平面实例:Origin 14显示示对话框，例如框，例如1点点击图标选择曲曲线类型型23输入曲线的信息在曲线定义输入曲线的信息在曲线定义框并且确认框并且确认曲线曲线(1/3)曲曲线作作为引引导线或参考或参考创建其他几何元素或作建其他几何元素或作为面的面的边界界15曲线曲线(2/3)Curve projected onto a supportCombined curveReflect lineIntersection curveCircles创建不同建不同类型曲

7、型曲线:Parallel curve16曲线曲线(3/3)SplineHelixCornerConnect curveSpiralConic17创建基本曲面创建基本曲面熟悉创建基本曲面熟悉创建基本曲面通过外形创建面通过外形创建面通过边界创建面通过边界创建面通过其他面创建面通过其他面创建面创建放样曲面创建放样曲面从面抽取元素从面抽取元素18通过外形创建面通过外形创建面一个一个闭合或不合或不闭合的合的轮廓廓给定定一根一根导线和一个面，或两根和一个面，或两根导线，可以，可以创建一个建一个扫掠面掠面一个一个闭合或不合或不闭合的合的轮廓廓给定一个方向和限定一个方向和限制，制，创建一个拉伸面建一个拉伸面给

8、定一个旋定一个旋转轴和角度可以和角度可以创建一个旋建一个旋转面面19创建球体创建球体20通过边界创建面通过边界创建面The blend surface is created between two curves lying each on a support;the evolution 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

9、 the surface inside the contour is defined by parameters.21从其他曲面创建曲面从其他曲面创建曲面You can create several offset surfaces at the same time.The offset surface is created from an existing surface,giving an offset value and a direction.The resulting surface is parallel to the initial one.22创建放样曲面创建放样曲面几个参数能建

10、立定几个参数能建立定义放放样曲面曲面:TangencyGuide curveClosing pointSpineCouplingLimitationManual coupling23几何操作功能几何操作功能修补元素修补元素切割和修剪元素切割和修剪元素从曲面提取元素从曲面提取元素适用转换适用转换推断元素推断元素创建接近元素创建接近元素创建阵列创建阵列24修补元素修补元素当合并几个曲面当合并几个曲面时修修补操作操作可以填充可以填充间隙隙用用Join这个操作可以集合一个个操作可以集合一个单一元一元素或几个相素或几个相邻的曲面，几个相的曲面，几个相邻的曲的曲线分解一个多元素曲面或曲分解一个多元素曲面或

11、曲线到独到独立数据元立数据元Split surfaceRestored surface恢复整个面即使面被多次修剪。恢复整个面即使面被多次修剪。The restored surface is a datum element.25切割和修剪元素切割和修剪元素修剪元素只可以保留每个元素的修剪元素只可以保留每个元素的一部分一部分用一个或几个几何元素用一个或几个几何元素（Cutting elements）去切）去切割另一个几何元素割另一个几何元素（Element to cut）不不论是否有支撑定是否有支撑定义，切割和修，切割和修剪都将被剪都将被执行行26从曲面提取元素从曲面提取元素Face extrac

12、tionEdge extraction可以从一个曲面给予传播条件提取边界，曲面或曲线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 limitsThe Complementary mode option allows you to de-select the elements to extract and select the non-selected elements.萃取一些元素萃取一些元素27显示示转换对话框框1点点击如何一个如何一个转换图标23输入转换的信息在定义框并且确认输入转换的信息在定义框并且确认转换转换(1/2)Transform

13、ations are used to modify the size,location,orientation,etc.of a wireframe or a surface element.一个操作可以同一个操作可以同时转换几个元几个元素素28转换转换(2/2)六种转换类型:TranslationRotationSymmetryScalingAffinityAxis to Axis 29推断元素推断元素Finally you will define the type of continuity and transition.First select the element boundary

14、which will be extrapolated,then the element 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.30创建接近元素创建接近元素The original element is transfer

15、red to the Hide space.You will select 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

16、part of a multi-entity element.You can create near elements from sketches or surfaces.31创建阵列创建阵列Reference elementSurface to patternYou can create circular or rectangular patterns of wireframe or surface elements.Element to patternReference element32完成几何元素在零件设计工作台完成几何元素在零件设计工作台通过曲面创建实体通过曲面创建实体33For e

17、ach type of feature a dialog box is displayed.Select the surface to be processed.1Click on the appropriate Surface-Based Feature icon.23Confirm feature creation.通过曲面创建实体通过曲面创建实体(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.34通过

18、曲面创建实体通过曲面创建实体(2/2)Split BodyThicken SurfaceClose SurfaceSew SurfaceFour ways of creating solids from surfaces are available:35修改几何元素修改几何元素 编辑元素编辑元素36编辑元素编辑元素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 par

19、ameters either entering new values or making new selections.You can edit elements after part creation to change some of the parameters and thus make a new version of the part.37工具运用工具运用You will become familiar with some tools used for managing wireframe and surfaces.Stacking CommandsManipulating Ele

20、mentsCreating Datum FeaturesWorking on a SupportUpdating a PartSelecting and Renaming an Open BodyMoving an Element within an Open BodyApplying Material onto a Surface38You define the parameters of the construction element.Stacking CommandsWhile creating an element you may need a construction elemen

21、t that you will create on the fly.The construction 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 w

22、hich requires those construction elements.39Manipulating ElementsYou 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.orYou can also delete an element from the specification tree.40创建数据特征创建数据特征Clicking on the Cre

23、ate Datum icon de-activates the History 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).41Working on a Support(1/2)You can select a plane or a surface

24、 to use it as a support for 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 automati

25、cally displays the option On surface.42Working on a Support(2/2)Creating a Support from a PlaneGrids are persistent,they are added to the specification tree.To deactivate the current grid:With the contextual menuor using the Working Support Activity iconDirectly change the grid settings43更新一个零件更新一个零

26、件更改默更改默认更新模式更新模式 Tools+Options+Shape.Note that the chosen update mode is the same in Wireframe and Surfaces and in Part Design.可以可以选择自自动或手或手动更新模式。更新模式。44选择一个选择一个 Open Body这个功能允个功能允许快速的快速的选择一个指定的一个指定的Open Body,(Open Body or PartBody)Body 选择器器45在在 Open Body里移动一个元素里移动一个元素可以不修改几何元素把它移可以不修改几何元素把它移动到另一个到另

27、一个OPEN BODYThe element is inserted above the element selected as destination.46曲面曲面连接接处允允许用用户检查:the distance (mm)the tangency (deg)the curvature (%)沿一个沿一个边界界缝合两个面合两个面Distance AnalysisTangency AnalysisCurvature Analysis检查曲面间的连接检查曲面间的连接47检查曲线间的连接检查曲线间的连接(1/2)Distance analysisTangency analysisCurvature analysis三个分析三个分析类型型:-距离分析距离分析-相切分析相切分析-曲率分析曲率分析48检查曲线间的连接检查曲线间的连接(2/2)Quick 选项允允许用用户勾勾选使得不使得不连续 不不侦测如果相切和曲率不如果相切和曲率不连续都被都被侦测,仅仅相切相切不不连续显示示在曲在曲线上上显示最大的不示最大的不连续值 49万万题上海同捷学院上海同捷学院Email：msn:50