《曲面基础教程》PPT课件

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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, Sketcher1 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

2、而 改变 点 (1/2)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

3、 Point-Point Line Point-Direction Line Angle/Normal to curve Line tangent to curveLine 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 throu

4、gh point Plane with angle to planePlane through 3 points Plane through 2 linesPlane 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 surfacePlane from equation Plane mean through points Planes between two planes 13 创建平面 (4/5) : 在两平面

5、之间生成多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 lineIntersection curve Circles创建不同类型曲线 : Parallel curve 17 曲线 (3/3) Spline

6、 HelixCorner Connect curve SpiralConic 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 evolution of t

7、he 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 offset surface

8、 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 curveClosing point SpineCoupling LimitationManual 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 25 修补元素当合并几个曲面时修补操作可以填充间

9、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 Edge extraction 可以从一个曲面给予传播条件

10、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, location, orientation, etc. of a wire

11、frame 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 element itself. You will then choose

12、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 the multiple element from which y

13、ou 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.You can create near elements from sk

14、etches or surfaces. 32 创建阵列Reference elementSurface to patternYou can create circular or rectangular patterns of wireframe or surface elements.Element to patternReference 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.Select the surface to be processed.1 Clic

15、k 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 Surface Sew SurfaceFour ways of creating so

16、lids 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 selections. You can edit elements after part creatio

17、n 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 CommandsManipulating ElementsCreating Datum FeaturesWorking on a SupportUpdating a PartSelecting and Renaming an Open BodyMovi

18、ng an Element within an Open Body Applying Material onto a Surface 39 You define the parameters of the construction element.Stacking CommandsWhile creating an element you may need a construction element that you will create on the fly. The construction element is created and selected at the same tim

19、e.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 elements. 40 Manipulating ElementsYou will cut or copy one or se

20、veral 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 History mode. You will then create the datum feature element and

21、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 for further element creation. Support plane = YZWith the Snap to

22、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 Suppo

23、rt 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 Activity iconDirectly change the grid settings 44 更新一个零件更 改 默认更 新 模 式 Tools + Options + Shape. Note that the chosen update mode is the

24、same in Wireframe and Surfaces and in Part Design. 可以选择自动或手动更新模式。 45 选择一个 Open Body 这个 功 能 允许快 速 的选择一 个 指 定 的 Open Body, (Open Body or PartBody) Body 选择器 46 在 Open Body里移动一个元素可 以 不 修 改 几 何 元 素 把 它 移动到 另 一 个 OPEN BODY The element is inserted above the element selected as destination. 47 曲面连接处允许用户检查 :

25、 the distance (mm) the tangency (deg) the curvature (%)沿一个边界缝合两个面 Distance Analysis Tangency Analysis Curvature Analysis 检查曲面间的连接 48 检查曲线间的连接(1/2) Distance analysis Tangency analysisCurvature analysis三个分析类型 :- 距离分析- 相切分析- 曲率分析 49 检查曲线间的连接 (2/2) Quick 选项允许用户勾选使得不连续 不侦测如果相切和曲率不连续都被侦测, 仅仅相切不连续显示 在曲线上显示最大的不连续值 50 万题上海同捷学院Email：wtt0822126.COMmsn: squirrel_