第四部分：工程绘图和应用

1、Copyright DASSAULT SYSTEMES1第四部分：工程绘图Copyright DASSAULT SYSTEMES2工程绘图简介：两种创建工程图的方式3D 2D 2D1.交互式2.创成式Copyright DASSAULT SYSTEMES3工程图生成流程：零件设计装配设计工程图设计更改- A -产生几何视图- B -生成尺寸标注草图设计关 联由于它们之间的关联性，在设计没有定型时也可以先生成工程图，一旦设计的模型更改，工程图也将自动更新。Copyright DASSAULT SYSTEMES4工程图生成步骤：连接器上盖生成标准三视图及轴侧视图1添加视图（剖视、局部视图等）2视图

2、规划（视图的摆放位置）3增加尺寸标注（公差、基准、形位公差等）460303D设计更改更新视图观察视图是否更改5Copyright DASSAULT SYSTEMES51Accessing the WorkbenchDrafting workbench is accessed from 1- Start menu 2- File menu 3- Workbench Icon23Copyright DASSAULT SYSTEMES 20026Drafting Toolbars and Objects1 - 2 -3 -4 - 5 -6 -7 -8 -Each toolbar contains o

3、bjects related to specific tasks.Objects within these toolbars are compressed and can be expanded for accessing additional functionalities.Dimension propertiesText propertiesGraphic properties12346578Copyright DASSAULT SYSTEMES7几个概念Drawing:单个零件或装配的完整工程图，可包括一张或若干张图纸（Sheet ）。Sheet:单张图纸，可包括多个投影视图（View）

4、。View:画法几何中的投影视图，可分主视图（Front View）、辅助视图、局部视图等。Detail Sheet:可存放多个组件（component）的图纸。Component:可看作在图纸中可重复使用的图块。Background和Working Views:Catia中一张图纸（sheet）可分为背景（Background）和工 作视图（Working Views），背景放置多张图纸共有的元素，如图框和标题栏等，工作视图放置工程图的主要内容，如投影视图和文字说明等，是每张图纸都不同的。两者可相互切换，编辑时互不干扰。Copyright DASSAULT SYSTEMES 20028Vie

5、w FrameView NameandView ScaleGridActive view (underlined in the tree and with a red frame)Specifications TreeViewsPrompt zoneDrafting TerminologyCopyright DASSAULT SYSTEMES9A CATDrawing file has a structure which lists all the sheets and views contained in the document. A Drawing Document file has e

6、xtension CATDrawing and is identified by the file extension.CATDrawing file extensionWhat is a Drawing?Copyright DASSAULT SYSTEMES101. Views can be associative (linked to 3D parts) or Unassociative (unlinked from a 3D part). a. Associative (Linked) Views to a 3D part are called GENERATED VIEWS. b. U

7、nassociative (Unlinked) Views to a 3D part are called DRAW VIEWS.3D PartWhat are the different types of Views?Generated ViewsDraw ViewsStarting a Generative Drawing You will learn how to generate a drawing directly from a 3D part. Guide PieceDrawingCopyright DASSAULT SYSTEMES121- Start menu Drawing

8、Documents (CATDrawing) can be created in various ways.How to Start a Generative Drawing from a CATPart?2- File menu3- Workbench IconCopyright DASSAULT SYSTEMES13File Options: New. for starting a default drawing document New from. for starting a drawing from an existing document Open. for opening an

9、existing document The New from or Open options could be for retrieving company startup documents.Classical Method to Start Generating a DrawingCopyright DASSAULT SYSTEMES 200214Setting Drawing Sheet Format and Drafting StandardsClick the Modify option to change the default sheet format size, orienta

10、tion, and display. The Administrator can customize these standards according to requirements. This can be done through the Standard Definition dialog box that appears on selecting Tools Standards.Format settings can be modified later if necessary: for example the paper orientation or size with menu

11、File + Page Setup.1.Standards ISO, ANSI and JIS can be set.2.Sheet styles(A0,A1,A2.)can be set.3.Orientation (Landscape or Portrait)can be set.Copyright DASSAULT SYSTEMES15Setting First Angle Projection213Right click on the sheet.Click on properties.Select first angle methodAfter changing the Sheet

12、properties to the first angle projection standard, set the sheet as the default so all other sheets will be created with the same angle of projection. Copyright DASSAULT SYSTEMES16Starting a Drawing with a Blank Sheet1Change to the Drafting Workbench from the Part Workbench.You can select the Blank

13、Sheet option in the new drawing creation dialog box. Select OK to accept the default drawing standards and Format Size.Select drafting from the list of favorites.23Defining the Main Views You will learn how to define the main views for a drawing using the View Wizard. The geometry will be generated

14、into these views from the associated Part Document.Copyright DASSAULT SYSTEMES181- Individually one by one 2- or by View WizardViews can be created in various ways:2The View Wizard is a quick way to select predefined view configurations or define a customized view configuration.Many types of views c

15、an be created one by one in an “as needed” approach.Creating Views1Copyright DASSAULT SYSTEMES19Creating a Front View Using Multi-Selection (1/2)You can create a front view either from a part, sub-body of a part, product, or from the sub-part of a product using a reference plane. 1Start the drawing

16、with a blank sheet Select the Front View icon from the Views toolbar Switch or activate the CAT Part or CAT Product document (window)Note: the Front View is used as the defining view when creating projection views. 23Copyright DASSAULT SYSTEMES20Creating a Front View Using Multi-Selection (2/2)Selec

17、t the bodies or parts to display in the tree (use Ctrl key). If none is selected, all bodies or parts will be displayed. Or select a local view axis to set the view origin.Select your front view plane. A preview will be shown on the drawing sheet.Click anywhere on the drawing sheet to generate the v

18、iew.When selecting a view plane, an orientation preview will be displayed when pre-selected (highlighted under the cursor)Preview of the front view 456Copyright DASSAULT SYSTEMES21Rotating the Front View with View Manipulator (1/2)clicking up arrow Dragging green handleclicking center left arrow cli

19、cking right arrow 1. Up, down, right and left arrows flip background plane view in 90 degrees.2.Center left and right arrows rotate view 30 degrees in the same plane. The 30 degrees increment can be changed with the contextual menu on the dial.3.The green handle(dot) rotates view freely on the same

20、plane. Before accepting the view, it can be reoriented with the view manipulator When finished, click on dial center or anywhere on sheet to generate the Front View.Copyright DASSAULT SYSTEMES22Rotating the Front View with View Manipulator (2/2)Set the increment of Rotation View Manipulator contextu

21、al menu settingsSet the angle of Rotation Set free Rotation Copyright DASSAULT SYSTEMES23To add a (Top) view on this drawingSelect desired location to place the view14Adding a Projection View on a DrawingThe Top view is generated with the default projection standard set to first angle projection (IS

22、O Standard). Activate the view (front) to project from (blue axes on and underlined in tree). Select the View Projection icon2Move cursor where View is to be projected3A preview of the projection view appears.A projection view is created from previously created view.Copyright DASSAULT SYSTEMES24Addi

23、tional View GenerationIn this lesson you will generate section, detail, auxiliary, isometric and broken views on a drawingAdding Section Views and CutsAdding Secondary ViewsAdditional Reference MaterialSummaryAdding Section Views and CutsYou will learn how to add section views and section cuts to th

24、e drawing Copyright DASSAULT SYSTEMES26What are the different types of Sections Views ?Offset Sections1.Simple offset section - a full section with a simple single cutting plane fully passing through the part 2.Complex offset section - a full section in which the cutting plane is offset to pass thro

25、ugh important features Simple Offset SectionAligned SectionsAligned sections, also called revolved sections, has a cutting plane revolving around an axis.There are 3 main types of sectional views; full section, offset or aligned depending on how the cutting plane is defined.Complex Offset SectionCop

26、yright DASSAULT SYSTEMES27Section View: A view of the cutting plane and any geometry that extends beyond the cutting plane in the direction of the sight (arrows). Section Views and Section Cuts Section Cut: A view of only the material that the cutting edge touches when passing through the part.Diffe

27、rence between a section view (Offset or Aligned) and section cut (Offset or Aligned)is explained here.Copyright DASSAULT SYSTEMES28Click at A, double click at B, then place the view CTo add a section view on this drawingThe section is added(A)1Activate the front view and select the desired Section V

28、iew icon(B)(C)Adding a Simple Section View on a DrawingUse the section cut icon and the same process to make a section cut viewNote : Preview appears234Front view is active when the blue axis is visible and the view name is underlined in the tree. If the Frame option is set on then the frame color w

29、ill be red around the active view.Adding Secondary ViewsYou will learn how to add secondary viewsDetail ViewsClipped ViewsIsometric ViewsBreakout ViewsBroken ViewsCopyright DASSAULT SYSTEMES30Secondary Views:1) Detail Views: A detail view is defined by a callout on an existing view around the area t

30、o be enlarge for the new view. The callout can be a circle or an free-hand sketched profile.2) Clipped Views: A clipping view is defined by a “callout” on an existing view. The callout can be a circle or an free-hand sketched profile and the clipping will remove all the existing views geometry that

31、is not in the callout.3) Isometric Views: An isometric view is the projection of the 3D part and its relation to the current rotation of the XYZ plane.4) Broken Views: A broken view is defined by adding break lines to determine an area of the view that will be removed. Views can be broken horizontal

32、ly or vertically. What are secondary Views ? (1/2)Secondary Views are added to improve the clarity of the description of a part through better visualization and/or to aid in dimensioning. There are seven types of secondary views.1324Copyright DASSAULT SYSTEMES31Secondary Views:5) Breakout Views: A b

33、reakout view allows the creation of a local cut (by a plane) in order to see the inside of a part without cutting it totally.6) Auxiliary Views: An auxiliary view is a view created in a given direction which is not a direction that can be obtained with a standard view7) Unfolded Views: An Unfolded v

34、iew is a view that can only be obtained from a Sheet Metal part. This kind of view unfolds the sheet metal part in accordance with the rules which have been applied to the bendsWhat are secondary Views ? (2/2)576Copyright DASSAULT SYSTEMES 200232Select the Isometric icon1Adding an Isometric View3A p

35、review of the Isometric View displays4Select anywhere on the drawing to generate the view(A)2Select a face on the part in the Part or Product documentIf needed, use the View Manipulator to reorient the Isometric view. Copyright DASSAULT SYSTEMES33Editing Views Layout and PropertiesIn this lesson you

36、 will change the layout of views on a drawing and change the properties of the viewsEditing View and Sheet PropertiesRepositioning ViewsModifying ViewsModifying Profile DefinitionAdditional Reference MaterialSummaryEditing view and sheet propertiesYou will learn how to edit the view and sheet proper

37、ties.Copyright DASSAULT SYSTEMES35View and Sheet properties control all the variables related to specific views and sheets of the drawing. What are view and sheet properties?Copyright DASSAULT SYSTEMES 200236Select the view to modify in the tree or View frame and Properties with the contextual menu1

38、Select the View or Graphic tab and change the necessary options, here : (A) View name (B) Dress up to have fillets on (C) Visualization to remove the frameView PropertiesMulti-selection of views is allowed on a single sheet or on different sheets2ABCCopyright DASSAULT SYSTEMES37Select the Sheet (She

39、et1) in the tree and Properties in the contextual menu to change its name.2Use this option to generate the views on the sheet using the 1st angle projection method (ISO)1Modify the Sheet name, scale, or projection method (ANSI or ISO).Sheet PropertiesCopyright DASSAULT SYSTEMES38Views can be reposit

40、ioned in five different ways. Repositioning Views Options: 1 - Relative Positioning 2 - Maintain (or not) alignment with “Parent” Front view 3 - Superpose origins with another view 4 - Align views by element selection 5 - Text and View positioning toolThe “Parent” Front view relationship is establis

41、hed when views are added from the front view or created with the Wizard. These “children” views will maintain the alignment link with the “parent” front view unless the alignment is broken.221Repositioning views on a single sheet3145Copyright DASSAULT SYSTEMES 200239Select the view or views to be al

42、igned2Select the positioning tool IconMoving views on a sheet with the Positioning Tool13Select the desired positioning option (Vertical Distribute)4The views will move accordingly (aligned vertically at an evenly distributed distance)The positioning tool can be position both views and text. They ca

43、n be aligned from an element, Spaced vertically or horizontally, distributed or even moved a specific distanceModifying Profile DefinitionYou will learn how to modify the geometrical properties of the definition profile of Section, Detail and Auxiliary views.Copyright DASSAULT SYSTEMES41The design o

44、f your parts or products will evolve with time. CATIA allows you to modify the arrangement of views, and to modify the section, detail and auxiliary views to clarify your drawings.Original partOriginal associated drawingNew version of the partUpdated drawing, section view modifiedWhy change the Prof

45、ile?Copyright DASSAULT SYSTEMES42Double click on the Section view callout to open the Edit/Replace toolbar which allows you to perform several kinds of modifications.1Move the section profile : Select the callout. Drag and drop at a new location.Changing Section View Profile (1/3)Select the exit ico

46、n to apply the modifications.32aYou can drag the section profile and drop at a new locationIsometric viewCopyright DASSAULT SYSTEMES43Double click on the Section view callout to open the Edit/Replace toolbar which allows you to perform several kinds of modifications.Inverse the view direction : sele

47、ct the Invert Profile direction icon.Changing Section View Profile (2/3)Click on the exit icon to apply the modifications.132bYou can inverse the direction of section profile by using Edit /Replace toolbar.Copyright DASSAULT SYSTEMES44Replace the profile : select the Replace Profile icon. Create you

48、r new profile to replace the old one. Double click on the Section view callout to open the Edit/Replace toolbar which allows you to perform several kinds of modifications.Changing Section View Profile (3/3)Select on the End Profile Edition icon to apply the modifications.You can replace the section

49、profile with a new one using the Edit/Replace toolbar.12c3Dimensioning Introduction and TerminologyYou will be introduced to dimensioning and the dimensioning terminologyCopyright DASSAULT SYSTEMES46ToleranceText above the main valueMain ValueText under the main valueText before the main valueText after the main valueDimension lineExtension lineExtension gap (Blanking)OverrunTerminology:Tools:General/QuickDimensioningAutomatic DimensioningWeldTextText with LeaderGeometric To