CATIA 培训 曲线和曲面设计.pdf

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1、CATIA 曲线 曲线 Copyright DASSAULT SYSTEMES 2002 培训 线和曲面设计 线和曲面设计 版本 catia v5 2003年12月 侯彦军 1课程介绍 课程目标 课程目标 在此课程中大家讲学习如何构造线架 曲面特征去设计修饰存在的三维零件 适用对象 新的 用户 新的CATIA V5 用户 1day 1 day Copyright DASSAULT SYSTEMES 2002 架元素并且使用线架元素和基本的 件实体。 具备知识 零件设计（Part Design）, 零件设计 g , 草图 （Sketcher） 2目录 (1/2) 1. 介绍线架和曲面设计 2.

2、生成线架几何体 生成空间点 生成空间直线 生成空间平面 成间 平 面 生成空间曲线 3. 生成基本曲面 由 个轮廓生成 个曲面 由一个轮廓生成一个曲面 生成一个球面 生成扫掠面 从另一个曲面生成一个曲面 从一个边界曲线生成一个曲面 Copyright DASSAULT SYSTEMES 2002 p.6 p.14 p.15 p.23 p.31 p p.42 p.59 60 p.60 p.64 p.66 p.72 p.78 3目录 (2/2) 4. 对几何体执行操作 连接元素（Joining Elements） 修复元素（Hl iE l t ） 修复元素（Healing Elements） 重建

3、元素（Restoring Elements） 分解元素（Disassembling Elements） 分割元素 (Splitting Elements) 限定元素 (Trimming Elements) 由曲面生成元素（Creating Elements from 由曲面生成元素（Creating Elements from 变换元素 （Transforming Elements） 向外扩展元素（Extrapolating Elements） 生个邻 生成一个相邻元素 (Creating a Near Eleme 生成图案样式（Creating Patterns） 5. 完善零件设计中的几何

4、体 5. 完善零件设计中的几何体 6. 修改几何体 7. 使用工具 Copyright DASSAULT SYSTEMES 2002 p.111 p.112 115 p.115 p.117 p.118 p.119 p.124 m Surfaces p 126 m Surfaces p.126 p.130 p.142 ent) p.147 p.150 p.156 p.156 p.164 p.170 4介绍线架和曲面设计 通过下面学习你将能够熟练使用 通过下面学习你将能够熟练使用 WSD(Wireframe and Surface Design W 如何进入线架和曲面设计 线架和曲面设计工作模块

5、线架和曲面设计工作模块 线架和曲面设计工作模块 线架和曲面设计 作模块 线架和曲面设计工作模块 Copyright DASSAULT SYSTEMES 2002 用线架和曲面设计工作模块 用线架和曲面设计工作模块 Workbench ) 计工作模块 块用户菜单 块用户菜单 块术语 块术语 块一般工作过程 5进入工作模块(1/2) 启动CATIA进入线架和曲面设计工作模块 选择机械设计模组中的线架和曲面 选择机械设计模组中的线架和曲面 第一次进入线架和 作模块，Open b 缺省生成的几何元 Copyright DASSAULT SYSTEMES 2002 块，选择开始菜单， 面设计模块。 线架

6、和曲面设计 作 面设计模块。 线架和曲面设计工作 模块图标 和曲面设计工 body.1 是系统 元素。 6进入工作模块(2/2) 你 线架 作模块 一旦你进入线架和曲面设计工作模块，下面相关 工具条菜单就将显示： 线架几何体 操作和变换 Copyright DASSAULT SYSTEMES 2002 工具 关的 曲面元素 复制工具 7用户菜单(1/2) 零件树 你可以在 Open body 上生成线架和曲面元素. 线架和曲面 特征 特征 Copyright DASSAULT SYSTEMES 2002 标准工具条 表示你在线架和曲面设计 表示你在线架和曲面设计 工作模块。 你可以使用二维 草

7、图功能工作。 线架和曲面设计工 线架和曲面设计工 作模块的操作菜单 8用户菜单(2/2) 你也可 Copyright DASSAULT SYSTEMES 2002 可你通过菜单进入线架和曲面设计工作模块。 9术语 Part2 是 PartBody 和 Open Body 的组合： PartBody （零件实体）包含那些 生成实体元素所使用的特征。 Open body.1（开放体）包含那些 生成曲面元素所使用的特征。 一般包括线架元素，草图等等 当你进入线架和曲面设计工作平 当你进入线架和曲面设计工作平 台或是生成线架和曲面元素时一 个 Open_body 将被激活。 Copyright DAS

8、SAULT SYSTEMES 2002 当你处于线架和曲面设计工作平台并且 你想生成参考元素如：点，平面，直线 时，一个包含那些元素的open_body将 自动生成并插入在Pt Bd上 自动生成并插入在 PartBody 上。 用此菜单在任何时候你可以插入一个 Open body去生成线架和曲面元素。 10 p _ y去生成线架和曲面元素。一般工作过程 生成线架 生成 生成 进入线 在零件设计工 作平台完成你 的零件设计 在你的曲面设 实施各种操作 如：剪切，限 组合 填充等 的零件设计。 组合，填充等 检验后修改完善你 的设计结果。 Copyright DASSAULT SYSTEMES 2

9、002 从一个现有的实体: 实 架和曲面去完成一个实体设计 或 成新的 open body: 成新的 open body: 线架和曲面设计工作平台 进入工作平台去生成 2D 或 3D 线架几何元素。 在这些线架参 设计上 作。比 限定， 等等 在这些线架参 考元素的基础 上生成曲面。 等等。 11小结 . 你现在已经看到了CATIA V5 线架和曲面的 那么让我们来回顾几个问题: 如何进入工作平台 它的用户界面以及菜单 工具条是什么样 它的用户界面以及菜单，工具条是什么样 他常用的术语有那些 设计的一般工作过程 Copyright DASSAULT SYSTEMES 2002 用户设计界面，

10、样的 样的 12生成线架几何体 你将成为构造线架几何元素的高 你将成为构造线架几何元素的高 在3D空间生成点 在3D空间生成点 在3D空间生成直线 在3D空间生成平面 在3D空间生成平面 在3D空间生成曲线 总结 总结 Copyright DASSAULT SYSTEMES 2002 高手 高手 13生成空间点 你将学会使用不同的方法在 Copyright DASSAULT SYSTEMES 2002 在三维空间建立点。 14为什么你需要点 ? 关于点的 些 使用它来建立所有的几何学的元素或使用他们当做生成 何元素的叁考。 关于点的一些 - A point can be d point (or

11、igin or se A point can be d 结构树上点结构的标识。 - A point can be d Coordinates 你可以在任何时候双 edit any type of po th t th the tree or on the g specifications in th On plane Between On curve Copyright DASSAULT SYSTEMES 2002 些说法 成任何几 些说法 ? defined by its coordinates from a reference elected point). defined ith res

12、pect to an element defined with respect to an element. 双击结构树上任何类型点的定义标是You can oint by double-clicking on its identifier in t Y ill th h it Default color codes for points: geometry. You will then change its he Point Definition box. . Blue for point or projection of point in creation . White when cre

13、ated . White when created . Green for reference In some cases you can reverse the direction of creation of the point, clicking either the red arrow on point or the Reverse Direction button in the Point 15 Direction button in the Point Definition box.生成点 1 点击点的图标 点定义对话框将提供给你各 2 点定义对话框将提供给你各 义方法来生成点。

14、2 Select one of these Point typ 让我们现在来看看各 Copyright DASSAULT SYSTEMES 2002 让我们现在来看看各 各种不同的定 各种不同的定 pe options. The dialog box contents changes according to the selected Point Type option selected Point Type option. 3 Enter point specifications in the Point Definition box and confirm. 各种不同的定义点的方法 16

15、各种不同的定义点的方法 .Creating a Point Giving its Co 1 2 Enter the coordinates of the point. 3 Click OK to Copyright DASSAULT SYSTEMES 2002 3 Click OK to oordinates 2+ Select the reference point if you want it different from the origin point. Reference point Origin point Created point confirm point creation.

16、 Origin point (0,0,0) 17 confirm point creation.Creating a Point on a Curve (1 1 2 Select the curve on which the point wil Di t t Distance to reference = 50 C Reference Point 2 Ex Po Created Curve Point.2 Extremity Point.1 Point.4 Geodesic Euclidean If you do not select a reference point the default

17、 will be the curve extremity. If th f i t l t i t th Copyright DASSAULT SYSTEMES 2002 If the reference point you select is not on the cu will be projected normally onto the curve. 1/3) If you click on one of these buttons you directly create a l be created. buttons you directly create a point on the

18、 nearest extremity or at the middle of the curve. 3 Enter point specifications. xtremity oint.3 t one it 18 urve it Creating a Point on a Curve (2 4 If you want to create several points on the se h k th ti Rt b jt f tO 5 curve check the option Repeat object after O Click OK to continue. The created

19、point is defined as an Ob The created point is defined as an Ob the reference for creating the other p 61 6.1 Define the number of points to b You can create automatically the planes normal to the curve at each created point. The point instances are grouped in a new Open Body (unless hk t h Copyrigh

20、t DASSAULT SYSTEMES 2002 you uncheck the option). 2/3) elected OK OK. bject i e bject, i.e. oints. be created. If no reference is selected for the Object point the default second point is the nearest extremity of the curve. In that case the arrow located on the Object point can be in erted to choose

21、 on hich side of point can be inverted to choose on which side of the curve the points will be created. If a reference is defined for the Object point the second point is identical to the reference point. 19Creating a Point on a Curve (3 62Ylht d f i t h 6.2 You can also choose to define the num to

22、be created and the spacing between 7 Click OK to confirm point creati Repeated Point. and Point.6 adot6 Reference Ob Point.2 Ob Po Copyright DASSAULT SYSTEMES 2002 3/3) bfi t ber of points the points. on. .5 bject bject oint.4 20Creating a Point on a Surface 1 2 Select the surface on which the point

23、 w 2 Select the surface on which the point w Components means direction from the p reference point to the created point. You can choose another direction by selecting a line or a plane to get its normal. Copyright DASSAULT SYSTEMES 2002 3 Click OK to confirm point c will be created and enter point s

24、pecifications will be created and enter point specifications. If you do not select a reference point, the default one will be the surface center. If the reference point you select is not on the surface, it will be projected onto the plane. Created Point.5 Reference Distance = 50 Point.3 21 creation.

25、生成空间直线 You will learn the different w Copyright DASSAULT SYSTEMES 2002 ways to create lines in 3D 22Why Do You Need Lines ? Wh t b t You can use lines as guide, reference, axis, direct What about A line can be creat from points or ve on a curve Identification in tree on a curve on a support You can

26、edit any ty id ifi i h Point- Direction Point-Point identifier in the tre change its specific Angle/Normal to curve Tangent to curve Normal to surface Copyright DASSAULT SYSTEMES 2002 surface li ? tion or join to create other geometric elements. lines ? ted: ertices* * Vertices are visible neither i

27、n the tree nor in the geometry ; they are auto-detected and selectable when passing the selectable when passing the mouse over them. ype of line by double-clicking on its h Y ill h ee or on the geometry. You will then cations in the Line Definition box. This option allows This option allows you to c

28、reate the line on a support surface. 23What about Lines ? Modification of line paramete Graphic manipul You can modify the line length keying in start and end value in the Line Definition box or dragging the Line Definition box or dragging the graphic manipulators. Copyright DASSAULT SYSTEMES 2002 e

29、rs (length, orientation) ators In some cases you can reverse the direction of creation of the line, clicking either the red arrow on line origin or the Reverse Direction button in the Line Definition box. Line origin 24Creating Lines 1 Click on Line icon The Line Definition dialog you various method

30、s to cr 2 you various methods to cr Select one of these Line ty Copyright DASSAULT SYSTEMES 2002 Let s see now th box offers reate a line reate a line. ype options. The dialog box contents changes according to the selected Line Type option 3 Enter line specifications in the Line Definition box and c

31、onfirm. 25 e different ways to create lines .Creating a Line between Two 1 2 Select two points or vertices. Sketch verte 3 Optional : extend the line at the s The Mirrored Copyright DASSAULT SYSTEMES 2002 The Mirrored to impose the either end of Points (1/2) ex Point.1 Line.1 is created between a ve

32、rtex of Sketch.1 and Point.1. start or/and end point(s). extent option allows you 26 extent option allows you e same extrapolation on the line.Creating a Line between Two 4 Optional : you can define a support surface) onto which the line will be p surface) onto which the line will be p 5 Click OK to

33、 confirm line creatio S Copyright DASSAULT SYSTEMES 2002 Points (2/2) (plane or projected projected. on. Four vertices can be detected on the created line : the two initial points and the limit initial points and the limit point of each extrapolation. Selectable vertices 27Creating a Line from a Poi

34、nt a 1 2 Select a reference point and a direct points of the line. Optional: Optional: You can define a support element onto which the line will be projected pj Line length The Mirrored extent option allows you to 3 py impose the same extrapolation on either end of the line. Copyright DASSAULT SYSTE

35、MES 2002 3 Click and a Direction tion line then key in the start and end Reference point Direction 28 OK to confirm line creation.Creating a Line Normal to a S 1 2 Select a reference surface and a poin A vector normal to the surface is disp A vector normal to the surface is disp at the reference poi

36、nt. Line length 3 Click OK to confirm Copyright DASSAULT SYSTEMES 2002 urface nt. played Reference surface played Reference point 2+ Check the Mirrored extent option to create the symmetry of the line with respect to the symmetry of the line with respect to the selected point. m line creation. 29Cre

37、ating Planes in 3D You will learn the different w Copyright DASSAULT SYSTEMES 2002 ways to create planes in 3D 30Why Do You Need Planes ? Wh t b t You can use planes as reference elements to cre What about You can create a p another plane points lines or c points, lines or c its equation Identificat

38、ion in tree Offset Angle/Normal to plane Offset You can edit a identifier in the change its spe p Through 3 points Equation Copyright DASSAULT SYSTEMES 2002 l? eate new geometry or as cutting elements. planes ? plane from: urves urves ny type of plane by double-clicking on its e tree or on the geome

39、try. You will then ecifications in the Plane Definition box. You can modify the plane location dragging it after clicking on the Move label. 31What About Planes ? Modification of plane parame In some cases you can rev the direction of creation o plane, clicking either the r arrow on plane origin or

40、th Reverse Direction button i Plane Definition box. Plane origin g Copyright DASSAULT SYSTEMES 2002 eters (offset, orientation) verse f the Graphic manipulator red he in the You can modify the plane offset keying in the offset value in the Plane Definition box or dragging 32 Plane Definition box or

41、dragging the graphic manipulator. Creating Planes 1 Click on Plane icon The Plane Definition dialog box of 2 Select one of these Plane type op Copyright DASSAULT SYSTEMES 2002 Let s see now the d ffers you various methods to create a plane. ptions. The dialog box contents changes according to the se

42、lected Plane Type option. 3 Enter plane specifications in the Plane Definition box and confirm. co 33 different ways to create planes .Creating an Offset Plane (1/2) 1 2 Select the reference element (plane, fac Reference plane 3 Define the offset value, either in the field or using the graphic manip

43、ula If you want to create seve 4 field or using the graphic manipula If you want to create seve separated by the same of check the option Repeat o 4 Copyright DASSAULT SYSTEMES 2002 ce, etc). e Offset ators eral planes ators. eral planes ffset value, object after OK. 34Creating an Offset Plane (2/2)

44、 Click OK to continue 5 Click OK to continue. The created plane is defined as an the reference for creating the other 5 6 Define the number of planes to be created. 7 Click OK to confirm plane cr Object plane Plane instances in Open Body A l id itd it hO b jt Rt i t id Copyright DASSAULT SYSTEMES 20

45、02 As many planes as indicated in the Object Repetition d The planes are separated from the object plane by a m Object plane Object, i.e. r planes. The plane instances are grouped in a ne Open Bod ( nless o eation. in a new Open Body (unless you uncheck the option). di l b t d i dditi t th bj t l 35

46、 dialog box are created, in addition to the object plane. multiple of the offset value.Creating a Plane Parallel Thro 1 2 Select the reference element (plane or The plane parallel to the reference and 3 Click OK to confirm plan Copyright DASSAULT SYSTEMES 2002 ough a Point planar face) and the point

47、 . d passing through the point is displayed. ne creation. 36Creating a Plane Through a P 1 2 Select the planar curve. The plane passing through the cur The plane passing through the cur 3 Click OK to confirm Copyright DASSAULT SYSTEMES 2002 lanar Curve rve is displayed rve is displayed. Planar curve

48、 plane creation. 37Creating a Plane Normal to a C 1 2 Select a reference curve and a poi A plane is displayed normal to the You can select any point. By default the middle point of the ilt d curve is selected. 3 Click OK to confirm plan Copyright DASSAULT SYSTEMES 2002 Curve int. e curve at the spec

49、ified point. ne creation. 38Creating a Plane Tangent to a 1 2 Select a surface and a point. The plane passing through the po The plane passing through the po 3 Click OK to c Copyright DASSAULT SYSTEMES 2002 a Surface oint and tangent to the surface is created oint and tangent to the surface is created. Surface Point confirm plane creation. Point 39 pCreating Several Planes Betw You can create plane instances between two exist 1 2 Select two planes and key in the num You can choose to create the plane instances in a new Open Body. 3 Clic Copyright DASS