catia v5 basic training english cax 2009

5/27/2018 Catia v5 Basic Training English Cax 2009

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Graz University of Technology

CAx in Automotive and Engine Technology313.067

Dipl.-Ing. Michael LangDipl.-Ing. Harald Macheiner

CATIA V5Basic Training


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CATIA V5 Basic Training


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Preface

The present script includes an introduction of the main features in the 3D designsoftware package Catia V5. Beside the basic tools of 3D design, a number of

exercises and examples point to different construction strategies in severalapplications. In addition to the primary functions, methods for the generation of solidcomponents and assemblings are explained and executed by use of differentexamples.

Training targets:

Sketch mode

Basic part design

Enhanced features of part design

Assembly design and product structure

Generating drawings

The script is based on Catia V5 Release 15 and will be updated continuously. To keepthe paper up to date and to fulfill the requirements on the Catia V5 education at a highlevel, questions, critics and new inputs are sincerely welcome. Please write an emailto:

DI Michael Lang: [email protected] Harald Macheiner: [email protected]
mailto:[email protected]:[email protected]:[email protected]:[email protected]


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Table of contents

1 Introduction ..........................................................................................7

1.1. An excerpt of available workbenches ............................................................. 8

2 The user interface of CATIA V5 ...........................................................9

2.1. Graphic display .................................................................................................. 9

2.2. Mouse button assignment ................................................................................ 10

2.3. User defined settings ....................................................................................... 10

3 An excerpt of menus ..........................................................................11

3.1

Start.............................................................................................................. 11

3.2 File ............................................................................................................... 11

3.3 Edit............................................................................................................... 12

3.4 View ............................................................................................................. 12

3.5 Insert ............................................................................................................ 14

3.6 Tools ............................................................................................................ 14

3.7 Window ........................................................................................................ 15

3.8 Help.............................................................................................................. 16

4 Toolbars in the workbench Part Design .............................................16

4.1 Standard toolbar........................................................................................... 16

4.2 Knowledge ................................................................................................... 17

4.3 Workbench ................................................................................................... 17

4.4 Graphic Properties ....................................................................................... 17

4.5 View ............................................................................................................. 18

4.6 Select ........................................................................................................... 19

4.7 Sketcher ....................................................................................................... 19

4.8 Sketch-Based Features, Sketch-Based Features (compact)..................... 19

4.9 Dress-Up Features....................................................................................... 204.10 Advanced Dress-Up Features ...................................................................... 20

4.11 Reference Elements, Reference Elements (extended) .............................. 20

4.12 Constraints ................................................................................................... 20

4.13 Transformation Features .............................................................................. 21

4.14 Surface Based Features, Surface Based Features (Extended)........... 21

4.15 Insert ............................................................................................................ 21

4.16 Boolean Operations...................................................................................... 22

4.17 Selection Sets .............................................................................................. 22

4.18 Tools ............................................................................................................ 224.19 Annotations .................................................................................................. 22

4.20 Analysis........................................................................................................ 23


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4.21 Apply Material............................................................................................... 23

4.22 Measure ....................................................................................................... 23

5 The sketch mode Sketcher................................................................24

5.1 Using the Sketcher....................................................................................... 24

5.2 Operations in the sketch mode..................................................................... 24

5.2.1 Sketcher................................................................................................ 255.2.2 Profile.................................................................................................... 255.2.3 Operation .............................................................................................. 265.2.4 Constraint.............................................................................................. 275.2.5 Sketch Tools ......................................................................................... 275.2.6 Tools ..................................................................................................... 28

Example 1: Regular hexagon, wrench size of 100mm............................................ 29

5.3 Structure of the specification tree of a sketch ................................................... 38

Example 2: Milled panel.......................................................................................... 39

Example 3: Mounting plate...................................................................................... 40

6 Generation of bodies in the workbench Part Design ..........................40

6.1 3D Basic Features........................................................................................ 40

Example 4 - PAD: Hexagon profile, Wrench size 100mm, Height 20mm................ 40

Example 5 - SHAFT: Rotational solid...................................................................... 43

Example 6 - RIB: Profile swept along a center curve .............................................. 45

6.2 Manipulation features ................................................................................... 46

Example 7: Plate..................................................................................................... 47

The Feature Pocket............................................................................................. 47The Feature Groove ............................................................................................ 49The feature Hole.................................................................................................. 49

Helpful additional functions ..................................................................................... 53

Applying material................................................................................................. 53Measure Inertia ................................................................................................... 53Using Search....................................................................................................... 53Using Search....................................................................................................... 54Taking pictures of elements................................................................................. 54

Example 8: Clevis ................................................................................................... 55

Beispiel 9: Lever ..................................................................................................... 55

Example 10: Prism piece ........................................................................................ 56

Beispiel 11: Sleeve.................................................................................................. 56

Example 12: Prism with threaded holes.................................................................. 57

6.3. Dress-Up Features....................................................................................... 58

Example 13: Angle piece ........................................................................................ 58

The feature Fillet ................................................................................................. 59The feature Chamfer........................................................................................... 60

The feature Draft Angle ....................................................................................... 61Checking the Draft (Draft Analysis) ..................................................................... 62The feature Shell................................................................................................. 63


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Feature Thickness............................................................................................... 63Feature Thread.................................................................................................... 64

Example 14: Bearing block ..................................................................................... 65

Example 15: Angular prism..................................................................................... 65

Example 16: Angle anchor plate with holes ............................................................ 66

Example 17: Machined part .................................................................................... 66

6.4 Transformation Features................................................................................... 67

Example 18: Drilled Panel....................................................................................... 68

Beispiel 19: Angle bracket....................................................................................... 69

Example 20: Asterisk shaped bracket..................................................................... 70

7 Part Designwith severalBodiesand Boolean Operations.................71

7.1 Boolean Operations .......................................................................................... 72

Example 21: Piston of a two-stroke engine ............................................................. 74

Example 22: Conrod ............................................................................................... 76

8. The Specification Treein Part Design................................................77

Example 23: Prism body ......................................................................................... 80

Example 24: Pendulum........................................................................................... 80

Example 25: Adjusting wheel .................................................................................. 81

9 Creating assemblies in the workbenchAssembly Design..................82

9.1. Operations in the Assembly Design mode ................................................... 82

9.1.1 Product Structure Tools...................................................................82

9.1.2 Constraints ......................................................................................83

9.1.3 Move................................................................................................83

9.1.4 Space Analysis................................................................................84

9.1.5 Update.............................................................................................84

9.2. The Specification Tree in Assembly Design ................................................. 85

9.3. The Desk in CATIA V5 ................................................................................. 86

Example 25: Crank drive......................................................................................... 87

Example 26: Clamping device................................................................................. 91

10 Excerpt of data management .............................................................92

10.1 Exporting 3D data ........................................................................................... 92

10.2 Exporting 2D data ........................................................................................... 93

10.3 CATIA V4 data ................................................................................................ 9310.4 File administration........................................................................................... 93

10.5 Publication ...................................................................................................... 94


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11 Creating drawings in the workbench Drafting.....................................95

11.1. Operations in the Drafting workbench............................................................ 96

11.1.7 Drawing................................................................................................. 96

11.1.8

Views .................................................................................................... 96

11.1.9 Dimensioning ........................................................................................ 9611.1.10 Generation......................................................................................... 9711.1.11 Dress-up............................................................................................ 9711.1.12 Geometry Creation ............................................................................ 9711.1.13 Geometry Modification....................................................................... 9711.1.14 Annotations........................................................................................ 98

11.2 The Properties Window................................................................................... 98

11.3. Basic steps for the creation of a dimensioned 2D drawing............................. 99

12 Create and use Parameters .............................................................102

Formula................................................................................................................. 102


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1 IntroductionThe 3D CAD system CATIA V5 was introduced in 1999 by Dassault Systems.Replacing CATIA V4, it represented a completely new design tool showing

fundamental differences to its predecessor.The user interface, now featuring MS Windows layout, allows an easy integration ofcommon software packages such as MS Office, several graphic programs or SAP-R3products (depending on the IT environment) and others.

Figure 2: User interface CATIA V5 R15

The concept of CATIA V5 is to digitally include the complete

process of product development, comprising the first draft, thedesign, the layout and at last the production and the assembly.The present training includes a selection of functionalities in theworkbench Mechanical Design.

Sets of workbenches can be composed according to the users preferences. ThereforeDassault Systems offers three different software installation versions.The platform P1 contains the basic features and is used for training courses or forreduced functionalities. For process orientated work the platform P2 is the appropriateone. It enables, apart from the basic design features, analysis tools and productionrelated functions. P3 comprises specific advanced scopes such as the implementationof external software packages.

Figure 1: User interface CATIA V4.2.2

Figure 3: Selection ofWorkbenches


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1.1. An excerpt of avai lable work bench es

Mechanical Design:

Sketches, 3D Design, 2D Drawings

Shape:Surface based design, Free formed surfaces

Digital MockupDigital Mockup, Packaging and Assembly Simulation

Equipment and Systems:Integration of complex elements and components such aswiring harnesses, hydraulic systems etc.

Analysis & Simulation:Calculation tool for the design accompanying simulation andanalysis

Machining:Manufacturing simulation and control tool for numerically

controlled machines

AEC Plant:Manufacturing and production planning, Optimization ofproduction lines

Infrastructure:Interfaces, Comprehensive work with other software packages,Data transfer


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2 The user interface of CATIA V5

Compared to CATIA V4, the desktop design is completely new. Established elementsof other software packages have been integrated and several well known features canbe used in CATIA V5.

Thus, figures can be directly inserted into MS Word documents out of CATIA V5, andMS Excel tables can be easily used as design tables in CATIA V5.

2.1. Graphic disp lay

Figure 4: Graphic display in CATIA V5

Menu bar with pull down menus for the access of CATIA features

Workbench symbol for quick switching between the workbenches

Standard toolbar containing common features such asOpen, Close, Print, Cutand Paste

The open window contains the model field and the specification tree

Compass, used for changing the view and moving objects

Status bar with instructions and prompts

The workbench toolbar displays all the features, that can be used within aspecific workbench


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2.2. Mouse bu tton assignment

A three buttoned mouse is needed to control the movements of the elements and thezooming, in the 3D-space as well as in the specification tree. The following mouse

button operation is used in the default configuration of CATIA V5.

Elements in the 3D-design space:

Move... Press and hold the middle mouse button and move the mouse.

Rotate ... Press and hold the middle mouse button. While still holding it,press and hold the left (or right) button and move the mouse.

Zooming ... Press and hold the middle mouse button. While still holding it,press the left (or right) button once and move the mouse.

Changing the center ... Click the middle mouse button on the location of the

element that shall be moved to the center of the window. Thewindow center also represents the rotation center.

Specification Tree:

Move ... Press and hold the left mouse button while the mousepoints at a branch of the tree, and move the mouse.

Zooming ... Click once on a branch of the specification tree (or on thecoordinate system in the right lower corner of the working space)with the left mouse button. The construction elements in the 3Dspace get darker, the tree is now set active. The zooming of the

tree can be done as described above. Another click on a branchdeactivates this function.

2.3. User defined sett ing s

The pull down menu Tools/ Options offers severaluser definable settings.For instance, displaysettings, constructionfacilities, file import andexport settings, memorysettings and many moresettings can be adjusted.By using the Resetbutton,all parameter values canbe set to the initial valuesfixed by DassaultSystems.

Figure 5: Opt ions


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3 An excerpt of menus

This chapter explains a selection of the most important menu bars of the workbench

Part Design. A couple of basic features (Start, File, Editetc.) are also available in otherworkbenches, other menu bars differ depending on the specific demands of the modes.The following chapters give a deeper understanding of single menu bars in differentworkbenches.

3.1 Start

The Start menu contains theworkbenches defined previously.The pull down menu is used to

switch from one workspace tothe other. Additionally, therecently opened, the active andthe previous open file names areshown. By clicking on thenames, the files can beactivated.

3.2 File

File comprises all the administrative functions for opening, saving or printing files. Inaddition, the recently used files are displayed.

Figure 7: Filemenu

Figure 6: Startmenu


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3.3 Edit

Some functions frequently needed during the design process such as Copy, Paste, CutorDeletecan be found in the menu Edit.

The feature Update is used to refresh the construction. Undo and Repeat are veryuseful commands to move one design step backwards or forwards again.

Searchcan find elements within the active document.

The commands Selection Sets, Selection Sets Editionand Find Owning Selection Setsenable the definition and the recall of selection criteria.

To edit document connections, Linksis used.

The definition or changing of component properties happens through Properties.

Scan or Define In Work Object makes the navigation between elements and thedefinition of In Work-objects possible. The following construction steps are executed onthis (defined) object.

Figure 8:Editmenu

3.4 View

The menuToolbarsallows the configuration of the toolbar visualisation on the screen.By clicking on a single toolbar name, the respective toolbar can be activated ordeactivated.

The Commands Listis used to directly access commands.


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The commands Geometry, Specifications, Compass and Reset Compass activate ordeactivate the corresponding elements.

Tree Expansionpermits the activation of the desired levels of the specification tree.

Specifications Overview and Geometry Overview provide an overlook of the activeSpecification Treeand geometry.

The visualization on the screen can be controlled by Fit All In, Zoom Area, Zoom In Out,Pan and Rotate with Modifyproviding even more options.

Figure 9: Viewmenu

If different predefined views should be created with the possibility to quickly switchbetween them, the command Named Viewscan be useful.

Render Style enables the adjustment of visualization settings. Apart from standardsettings, user defined render styles can be configured.

The menu Navigation Modeis used to choose from different types of part movement onthe screen: Fly: => Translative and rotatory movement

Walk: => Translative movement within an predefined plane

The features Lighting andDepth Effectaffect the display style of shaded objects.

A base plane can be inserted via Ground.


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Magnifiercan be used to display details.

Hide/Showswitches to the invisible space. Components, that are not needed at present,can be deposited in the invisible space.

To enlarge the window to its full size, Full Screenhas to be applied.

3.5 Insert

The Insert menu contains specific commands for each workbench. Most of thesefeatures can be activated via the toolbars as well. A detailed description of the maincommands is carried out in the specific modes Part Design andDrafting.

Figure 11: Menu Insertwithin the Draft ingmode

3.6 Tools

The features contained in Tools control the settings and user defined features.Additionally, several workbench specific tools are available.

Formula ... The parameters of the applied operations are displayed in a window. In

addition, modifications and specific applications can be defined.

Image... Creation of pictures and videos

Figure 10: MenuInsertwithin the Product mode


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Macro... The creation of macros is carried out in Visual Basic. Anadministration function supports a creation and organisation oflibraries.

Customize... The menu Customizeenables user specific modifications, as thereare the arrangement of menu bars or a setting of the interfacelanguage.

Visualization filters ... Layers (e.g. design spaces) can be switched visible / invisible.

Options... Basic settings are adjusted via the Options - menu:Specification treeNavigationPerformancesVisualizationThickness & Font

Linetype

Figure 12: Toolsmenu

Standards... To set default values for element properties, use Standards.

Conferencing... Conferencingis needed to organize conferences.

3.7 Window

Opened windows can be arranged and new windows can be opened with the Windowmenu. Furthermore the open files are displayed there.


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3.8 Help

A contextual help (Whats This?), explaining the commands instantly and a help menu(CATIA V5 Help) which requires special installation, are provided byCATIA V5.

4 Toolbars in the workbench Part Design

The desired toolbars can be shown and removed using the menu View / Toolbars.Depending on the activated workspace, specific toolbars are available.

Beside the general toolbarsStandard

KnowledgeWorkbenchGraphic PropertiesandView,

some workbench specific toolbars will be explained. After switching to anotherworkbench, the menu Toolbars automatically activates the accordant functions.Operational functions are not only accesseble in the according toolbars, they can alsobe accessed by the pull down menu Insert.

4.1 Standard too lbar

New... Creates a new part, assembly or drawing document

Open... Opens an existing document

Save... Saves the active document

Print... Prints the active document on the default printer, using the default

printer settings

Cut... Removes the selection from the active document and places it onthe clipboard

Copy... Copies the selection to the clipboard

Paste... Inserts the content of the clipboard at the selected location

Undo selection... Reverses the last action. It is possible to recall the command logand undo the last actions using the pull down menu

Redo... Repeats the last cancelled actionWhats this?... Provides help on toolbar icons


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4.2 Knowledge

Formula... The feature Formula corresponds with the one of the pulldown menu Tools

URLs and Comment... Create and edit URL addresses.

Check Analysis ToolboxThe check analysis tool allows users to show and fix allbroken checks to validate the design and generate reports

Design Table... Create and edit design tables and laws to create and editcomponent families

Knowledge Inspector... Analyzes impacts of change in parameter value or advisesparameter modification

Lock Selected Parameters Locks selected parameters and parameters inselected features

Equivalent Dimensions Creates equivalent dimensions

4.3 Workbench

Workbench... The Workbenchicon indicates the active workbench

4.4 Graphic Propert ies

Graphical adjustments such as fill colour, zooming, line thickness, line style, point style

and layer setting can be done.


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4.5 View

Fly... When navigating in the Fly mode, translations and rotationsin all three directions in space are possible.

Fit all in... Zooms in or out, so that all the selected geometry optimallyfits the available space.

Pan... Pans the view

Rotate... Rotates the view

ZoomIn... Zooms in in increments

Zoom Out... Zooms out in increments

Normal View... Displays the part with a view normal to a plane

Create Multi-View Creates four different views in the current window

Views ... Different standard views can be chosen: Isometric View,Front View, Back View, Left View, Right View, Top View,Bottom View, Named Views

View Modes:

Shading Displays the geometry in shading mode

Shading with Edges Displays the shaded geometry with edges

Shading with Edges without Smooth Edges Displays the shadedgeometry with edges without smooth edges

Shading with Edges and Hidden Edges Displays the geometry withedges and hidden edges

Shading with Material Displays the shaded geometry with material

Wireframe Displays the geometry in wireframe modeCustomize view parameters Activates the customized view mode,

enabling a customization of the view parameters

Hide / Show... Alternatively displays hidden and shown objects. Hidden elementsare dimmed grey in the specification tree.

Swap visible space ... Makes hidden space visible again


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4.6 Select

The Select menu offers several selection tools. Apart

from a single selection, different trap selections can bechosen.

4.7 Sketcher

The sketch mode is used to create 2D contours as a basis for thefollowing 3D modeling. A parameterization of the sketches is notmandatory. A detailed description of the sketcher follows in

chapter 5.

4.8 Sketc h-Based Features,

Sketch-Based Features (compact)

Sketch-Based Featuresand Sketch-Based Features (compact)are required to generate3D solid geometries.

Pad... Creates a prism from an open or closed profile. The profile can be generated in a sketch.

Pocket... The command Pocket creates a prism from a profile that isremoved from a body.

Shaft / Groove... Shaft creates a rotating solid from a profile and anaxis of revolution. A Grooveis a shaftthat is beingremoved from an existing geometry

Hole... Creates a hole within an existing body. The hole can alsobe threaded or countersunk

Rib / Slot... Creates a rib or a slot (i.e. a removed rib) by sweeping aprofile along a center curve

Stiffener... Creates a stiffener

Multi-sections Solid / Removed Multi-sections Solid... Creates a solid(or a removed solid) defined by several profiles andcorresponding guiding curves


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4.9 Dress -Up Features

The Dress-Up Featuresenable changes on existing bodies.

Edge Fillet ...Generates an edge fillet. Additionally, several other modes areavailable: Variable Radius Fillet, Face-Face Fillet and TritangentFillet

Chamfer... Creates a Chamfer by removing or adding material from aselected edge. Several input modes are possible (Length Angle,Length Length)

Draft Angle... The commands Draft Angle, Reflection Lineand Variable AngleDraftfacilitate the creation of drafts on existing solids.

Shell... Creates a shell by hollowing out an existing geometry

Thickness... Selected surfaces of an existing solid can be supplied withallowances

Thread / Tap... Creates a thread or tap by specifying its support, limits andnumerical values

Remove Face Removes one or more faces

4.10 A dvanced Dress-Up Features

The commandAdvanced Draftoffers enhanced draft options such as definingseveral pulling directions for one solid.

4.11 Referenc e Elements ,

Reference Elements (extended)

Reference elements are generated by means of prompt windows to define all relevantparameters.

Point... Creates one or more points in space

Line... Creates a line in space

Plane ... Creates a plane in space

4.12 Constraints

Constraints Defined in Dialog Box... Manages predefined constraints

Constraint ... Creates a constraint


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4.13 Transfo rmation Features

Translation... Translative movement of a solid in space

[Direction, Distance]

Rotation... Rotates a solid around an axis [Axis,Angle]

Symmetry... Mirrors a solid without duplication inreference to a selected face or plane[Reference= face/plane]

Mirror... Mirrors a solid (with duplication) in reference to a selected face orplane [Reference= face/plane]

Rectangular Pattern... Creates a two dimensional rectangular pattern to repeat afeature [Instances, Spacing]

Circular Pattern... Creates a circular pattern to repeat a feature [Instances, AngularSpacing]

User Pattern... Creates a user pattern to repeat a feature

Scaling... Scales (expands or compresses) an element

4.14 Su rface Based Features ,

Surface Based Features (Extended)

Split... Splits a solid by use of a plane, face or surface

Thick Surface... Creates a thick surface based on a surface byspecifying two thicknesses

Close Surface... This feature closes surfaces (e.g. surfaces thatwere designed in Wireframe and Surface mode),i.e. it generates a solid from the surface

Sew Surface... Integrates surfaces into a solid

4.15 Ins ert

Insert is used to insert a new body or geometrical set in the specification tree.The new element is inserted beneath the active element or into a specifiedcomponent.


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4.16 Boo lean Operat ions

By means of this menu commands affecting two bodies can be carried out. Thereference body should be set In Work.

Assemble... Assembles a body with another body

Add... Adds a body to another body

Remove... Removes a body from another body

Intersect ... Intersects a body with another body,resulting in a single body that displays the

shared space

Union Trim... Merges two bodies and enables a trim function

Remove lump... Removes a single piece of a body. This is a special case ofBoolean Operationsas it concerns only one body

4.17 Selectio n Sets

Selection Sets Edition ... Create and edit selection sets

Selection Sets ... Management of the saved selection sets

Find Owning Selection Sets Find all selection sets including theselected element

4.18 Tools

Update All ... Updates all features and connections within the part

Axis System ... Creates an axis system

Mean Dimensions ... Computes mean dimensions on toleranced parameters

Create Datum ... Creates a datum feature (= feature without history)

Only Current Body Option to display only the current body

Catalog Browser ... Opens a catalog, e.g. a screw catalog

Select Current Tool Selects / renames a current tool

4.19 An no tat ions

Text with Leader ... Creates a text with a leader line

Flag Note with Leader ... Creates a flag note with a leader line and URLsupport.


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4.20 Analys is

TheAnalysis features support a construction check regarding the producibility.

Draft Analysis... Analysis of drafts

Curvature Analysis ... Analyzes the curvature of surfaces

Tap - Thread Analysis... Analyzes all threads and taps of a component

4.21 Ap ply Material

Material properties can be applied to a body, enabling the computation of weight, inertiaetc..

Apply Material... Applies a material to a part

4.22 Measur e

Measure Between... Measures between two elements

Measure Item... Measures characteristics of an element

Measure Inertia... Measures inertial properties associated to aselected volume


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5 The sketch mode Sketcher

The sketch mode is used to create two dimensional sketches. A parameterization isnot mandatory. When working in the workbench Part Design, sketches can serve as abasis for the generation and modification of solids.

5.1 Using the Sketcher

The sketch mode is activated by clicking on the button Sketch. The SketchSupport has to be a plane or a planar surface. The Sketcher rotates theselected plane parallel to the screen plane (default setting in the Options).

For switching or refreshing the adjustment of the screen view, the feature

Normal View has to be used. The image plane is aligned parallel to theselected support plane.

In sketch mode areferencecoordinate systemis laid into thechosen plane. Thesketch module ispositioned justbelow the active

object in theSpecification Tree,and it contains theGeometry and theConstraints.A grid is shown,offering a snapfunction, if Snap toPoint has beenactivated. Thepreset toolbars aredisplayed on theright margin.

The individual setup of the desktop is done through Tools / Options(in the menu bar).The selection of the toolbars happens via the menu View / Toolbars.

5.2 Operat ions in the sketch mod e

The sketch mode contains, apart from standard toolbars, the following workbench-specific tools:

Figure 13: Sketchmode


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5.2.1 Sketcher

Workbench Sketchericon... Shows the active workbench

Exit workbench... Leaves the Sketcherand gets back to thepreviously active workbench

5.2.2 Profile

The menu Profile provides features for the creation of basic geometrical elements.While not being parameterized, the contour is displayed as white lines.

Profile... Creates a profile made of lines and arcs.

Predefined Profile... Creates predefined profiles:

-Rectangle-Orientated Rectangle-Parallelogram-Elongated Hole

-Cylindrical Elongated Hole-Keyhole Profile-Hexagon-Centered Rectangle-Centered Parallelogram

Circle ... Creates circles and parts of circles:

-Circle-Three Point Circle-Circle Using Coordinates-Tri-Tangent Circle-Three Point Arc-Three Point Arc Starting with Limits-Arc

Spline ... Creates a spline by clicking or selectingpoints:

-Spline(curve through points)-Connect(Creates an arc connecting twocurves)


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Conic... Creates Conic Curves:

-Ellipse-Parabola by Focus-Hyperbola by Focus-Conic

Line... Creates Lines:

-Line-Infinite Line-Bi-Tangent Line-Bisecting Line-Line Normal To Curve

Axis ... Creates an axis, e.g. for the creation of rotating bodies

Point... Creates a point by clicking:

-Point by Clicking-Point by Using Coordinates-Equidistant Points-Intersection Point-Projection Point

5.2.3 Operation

Corner ... Creates a corner with a user defined radius.

Chamfer... Creates a beveled corner.

Relimitations ... Modifies lines or profiles

-Trim-Break-Quick Trim-Close-Complement


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Transformation Transformation components:

-Mirror

-Symmetry-Translate-Rotate-Scale-Offset

3D Geometry... Generates 2D-curves from 3D elements:

-Project 3D Elements

-Intersect 3D Elements-Project 3D Silhouette Edges

5.2.4 Constraint

The toolbar Constraintcontains features for the assignment of constraints.

Constraints Defined in Dialog Box... Creates constraints checked in adialog box

Constraint... Creates a geometrical or dimensionalconstraint

-Constraint-Contact Constraint

Constrained Geometry... Creates Constraints:

-Fix together

-Auto Constraint

Animate Constraint... Animates dimensional constraints to showhow the constrained system reacts

Edit Multi-Constraint Edits constraint values and evaluates theconstrained geometries at the end

5.2.5 Sketch Tools

Grid ... Displays a grid


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Snap to Point Snaps the points to the nearest intersectionpoints of the grid

Construction / Standard Element ... Converts sketch elements intoconstruction or standard elements

Geometrical Constraints ... Creates the detected and the internalconstraints during sketching

Dimensional Constraints ... Creates dimensional constraints

5.2.6 Tools

Create Datum Creates a datum feature (without history)

Only Current Body Option to display only the current body

Output Feature Creates an output feature by selecting a 2Dgeometry

Profile Feature Creates a profile feature by selecting a 2Dgeometry

2D Analysis Tools Tools assisting the sketch analysis:

-Sketch Solving Status-Sketch Analysis


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Examp le 1: Regular hexagon , wrenc h size of 100mm

Intent ion: Usin g the Sketcher

This first example should describe how to generate sketches within the Part Designworkbench.To activate Part Designjust open a new part after having started CATIA V5:

1. File / New

By selecting Part the workbenchPart Design opens. The predefined

toolbars of the selected workbenchappear around the working area onthe screen.

2. Open the Sketcher

3. Select the xy-plane as sketch plane

The sketch plane can be selected by clicking ona plane either in the modelling area or in thestructure tree.The selected plane is then rotated in a way that itis parallel to the screen plane, and the sketchmode is activated. The corresponding toolbarsappear.

Figure 14: Opening a new part

Figure 15: Select a sketch plane


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4. Create a sketch

Using the feature Line(contained in the Profile menu),

a hexagon can be drawn.Double clicking the iconactivates the repetition mode.The Snap to Pointmode allowsto catch the ending point of theprevious lines. When the linehappens to be nearly vertical orhorizontal, a correspondingconstraint is established byactivating the Snap to Pointmode. The repetition mode of

the Line feature is deactivatedby clicking on the icon oncemore. Another way of creatingcurves containing lines (andcircles) is provided by thefeature Profile.

The symbols Hand Vnext tothe lines designate theirhorizontal or verticalorientation. During sketchingthe lines turn blue to show aconstraint. Coincidences aredisplayed as small greencircles. By double clickingonto the constraints, thecorresponding windowsopen. Constraints can beremoved using the deletefunction.

The geometrical elementscan be defined in differentways. One possibility is bydouble clicking thegeometrical elements

opening an input window.

Figure 18 shows the input window of a vertical line. Similar windows exist for all basicgeometrical elements in the sketch mode.

Figure 16:The Sketchworkbench

Figure 17: The first draft of the hexagon


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The feature Con-struction Elementenables the creationof auxiliary sketches

or elements that areNOT used for thegeneration of bodies.Auxiliary elementshave to be createdas ConstructionElements; otherwise,features as Pad arenot able to create ageometry from thesketch.

5. Constraining the sketch

Using Constraints,different constraints (geometrical constraints and dimensions) canbe defined. Both, angle dimensions and linear dimensions, can be defined.

Figure 19: Using Constra ints

Figure 18: Definition of the vertical line on the right side


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One possibility to dimension the hexagon is shown in Figure 21, but several otherways are possible. The dimensions shown in Figure 19show the values of the firstdraft; the dimension values can be changed by double clicking the values, e.g.:

Figure 20: After confirming the modification, CATIA is changing the geometry according to thenew value.

Figure 21: The completely dimensioned hexagon

The hexagon has to be constrained as well as its position in the working space. The

dimensioning of the sketch is complete when all elements turn green. White lines arenot completely parameterized, purple lines are overconstrained.


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Figure 22: Sketch containing over constrained elements

Overconstrained elements have to be revised. Underconstrained elements can beused, but undefined dimensions are considered as variable. Therefore these elements(displayed white) can be modified by CATIA, if needed.

In case that the profile is opened, it can be closed using Trim. After selecting

the button the two geometrical elements that shall be trimmed have to beselected.

The sketch mode offers the following constraints:

HorizontalVerticalCoincidencePerpendicular (90)FixParallelism

ConcentricityTangencyLength, Distance, Angle, Diameter, Radius

Figure 23: Constraint definition


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The pop up window shows all necessary inputs for the particular constraint. Thisfeature can be useful especially for the modification of dimensions. Some definitionwindows are shown in Figure 24. They are all similar: The specifications of thegeometrical elements are displayed and can be modified.

Figure 24: Definition windows for several geometrical elements


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Figure 25: Constraint definition via a definition window

Apart from generating dimensions one by one, it is possible to create severalconstraints at one time. To open the according window, the regarding elements haveto be marked (left mouse button, for multi selection press the Ctrl. button on thekeyboard) and

Constraints Defined in Dialog Boxselected.

The dialog box allows to select constraints that canbe used for the selected elements.

The button Exit Workbench causes CATIA toreturn into the 3D mode.


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Alternative hexagon design:

CATIA provides the feature Hexagon,which creates a regular hexagon.

The required inputdata are the centerpoint of the hexagonand the center pointof one of the edges.The wrench size andthe orientation of thehexagon can bedefined by use ofconstraints. Thisspecial featurecreates not only thehexagon contour,but all the singleelements that can beselected andmodified individually.For example, thispermits to deleteone single edge.

The toolbar Sketch tools

Sketch toolsis used to set miscellaneous helpful adjustments. Griddisplays gridlines;the grid size can be adjusted in the menu Tools / Options / Mechanical Design /Sketcher / Grid. Snap to Pointsnaps points to the nearest intersection points of thegrid.

The next feature switches to the constructionmode. When Construction / Standard Element isactivated, from now the generated geometry isbeing defined as construction elements and cannot be used in the sketch mode. Elements canalso be defined as construction elements ex postby simply selecting them and pressing theConstruction / Standard Element button. Anotherpossibility to switch between the two modes is toopen the definition box of the respective element

and activate / deactivate Construction Element.

Figure 26: Create a hexagon using Hexagon

Figure 27: Turning a point to aConstruct ion Element


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The following features activate the automatic assignment of geometrical ordimensional constraints. These constraints are displayed green and support thesketching. If Geometrical Elements is being deactivated, the constraints are displayed

but not applied.

Figure 28: Sketch Toolstoolbar for the feature Profi le

Some additional options supporting the creation of geometry are contained in Sketchtools. One of them is activated, if the feature Profile is used: The type of the profilecontinuation can be chosen (Line, Tangent Arc, Three Point Arc).

Sketch Analysis

Sketch Analysis enables an easy checkof the sketch concerning open contours,interfering points or overlaps. This toolcan be used for revising and editing thesketch.

Figure 29: Sketch Analysis


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5.3 Structure of the specif icat ion tree of a sketch

The Specification Tree shows the position of the

sketch within the Bodyand all the elements containedin the sketch. The coordinate system of the sketch isdisplayed in the tree as well. When leaving the sketchmode, the coordinate system is being switched intothe noshown space.

The group Geometry contains the geometricalelements; double clicking the elements in the treeopens the definition windows of the accordingelements.

Constraintscontains the set constraints; they can beedited similar to the geometrical elements (by doubleclicking).

Clicking on an element with the right mouse buttonopens a window with multiple options (Figure 30).

Figure 30: Option window of a line

Apart from editing features such as Hide / Show andCut / Copy / Paste, the menu offers access toProperties (Graphic, Feature Properties andMechanical) where, amongst other things, the nameand the graphic properties of the element can be set.

Figure 31: Specification tree of asketch


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Figure 32 shows the completehexagon sketch. Using Padgenerates a body from thesketch.

For editing the sketch, e. g.modifying the geometry, thesketch has to be double clicked,either in the structure tree or inthe modeling area. The changesof the sketch are automaticallytaken into account for the creationof the pad.

Examp le 2: Mil led panel

Intent ion : Conto ur creat ion and dim ension ing in the Sketcher

Figure 33: Milled panel

Figure 32: Complete hexagon


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Example 3: Mount ing plate

Intent ion : Contur creat ion and dimensio ning in the Sketcher

Figure 34: Mounting plate

6 Generation of bodies in the workbench Part Desig n

The workbench Part Design is used to create solid bodies. One Part can containseveral bodies. Based on the bodies, other features can be carried out, such asDrafting or the creation of Products. The bodies are generated by use of sketches(created in the Sketchermode). Based on these contours, basic solids are designed.Subsequently the solids can be modified (e. g. with Pocket, Chamfer, Fillet, Hole etc.).

6.1 3D Basic Features

The following basic features are offered:

Pad Shaft Rib

Examp le 4 - PAD: Hexagon pro f i le, Wrench size

100mm , Height 20mm

Intent ion : App l icat ion of th e feature Pad

The sketch created in Example 1 is used as a basis for thesolid. Selecting the button Pad opens a definition boxwherein the attributes can be edited.

undimensionedradii: 12mm

Figure 35: Paddefinition


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The Limit Type specifies the definition of the pad length. One possibility is to uselimiting planes or surfaces. This example uses the limiting type Dimension, the lengthis set 20mm. Sketch 1is selected as a profile.

Annotation:The sketch has to contain a closed contour to create a standard pad.

The feature Mirrored extent enables the extension of the body in both directions,Reverse Directionswitches the extension direction.

Selecting Moreactivates an extended definition window with the following options:

Second Limit:Extension into the otherdirection

Direction:Select the extension

direction (e. g. by sele-cting a line)

Thin Pad (only availablewhen Thickis activated):Creates a body with adefined thickness onboth sides of the profile.

The complete body isdisplayed according the

input values.

The hexagonally shaped solid is based on the sketch and the values of the paddefinition. To modify properties, the solid can be selected (either in the model area orPad 1 in the specification tree). The definition box should appear; it also offers themodification of the according

sketch (

).

The element Pad 1has been

inserted by CATIA in thespecification tree.To rename Pad1, click at theright mouse button. In theappearing properties windowthe menuProperties / FeatureProperties can be used torename the element, andProperties / Graphicchangesthe color.

Figure 36: Extended Paddefiniton box

Figure 37: The complete Pad


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Figure 38: Propert iesmenu of a pad

As a result, the hexagonal body is called First Try in the specification tree and isturned green.

The part can be saved using File / Save as.

Figure 39: Saving the hexagonal part


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Examp le 5 - SHAFT: Rotat ional so l id

Intent ion : Appl icat ion of the funct ion Sh aft

The feature Shaft generates rotating bodies; the rotation of the generating profile

doesnt need to be full 360. The rotation axis doesnt need to intersect the rotatingprofile, rendering possible the creation of closed rotating profiles such as tori. TheShaft definition demands a sketch, defining the rotating profile, and an axis ofrevolution.The following profile has to be generated using the sketch mode:

Figure 40: Sketch of the profile

After leaving the sketch mode and selecting the feature Shaft, a definitionbox for the shaft appears.


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Figure 41: Creating a Shaft

The sketch is used as Profile, the rotation axis is the vertical line of the coordinatesystem. The First Angle is set to 360 degrees, theSecond Angleis zero degree.

Figure 42: Complete rotating body


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Examp le 6 - RIB: Pro f i le swept along a center curve

Intent ion: Using the Rib feature

Two sketches or curves are needed to create a rib:

1. A contour of the rib2.The center curve along which the contour isbeing swept

Figure 46: Sketch of theGuide curve

After creating both sketches in two perpendicular planes, the feature Rib can be

selected.

Figure 44: Prof i leand Center curv e

Figure 43: RibFigure 45: Sketch of the Prof i le


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Figure 47: Defining aRi b

The definition box prompts a Profileand a Guide Curve.

Annotation: The sketch support can be changed: The sketch has to be clicked withthe right mouse button and Sketch.x object / Change Sketch Support has to beselected. The new support plane has to be picked. The existing constraints have to beadapted, if they refer to former reference elements.

6.2 Manipulat ion features

The following functions are a selection of the toolbar manipulation features and can beused to modify bodies.

Pocket Groove Hole

The manipulation features can, similar to the 3D basic features, base on sketchescreated in the sketch mode. Only the function Holeallows the definition of parameterswithin the dialog box; the positioning of the hole is done with a sketch that can beactivated within the box.


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Examp le 7: Plate

Intent ion : Ap pl icat ion o f the features Pocket, Groov e, Hole

As a basis solid, a Pad measuring 80 x 110 x

30mm has to be generated.

The Feature Pocket

Pocket creates a negative pad, i.e. it isremoved from the basis solid. To createthis negative pad, a profile is required.Therefore a surface of the solid pad isselected as sketch reference for thecontour.

All geometricalelements should beconstrained clearlyand withoutambiguity.

Annotation:It is valid to use

edges, wireframeelements or otherelements outsidethe sketch asreferences for thesketch. Figure 50shows the sketchusing the edges ofthe pad asreferences for dif-ferent dimensions.

Figure 48: The basis solid

Figure 49: Selecting a face of the pad as sketchsupport

Figure 50: Sketch for the Pocket


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Figure 51: Pocketdefinition

After picking the button Pocket, a definition box appears. The Depth is set to 20mm,the Profileis the sketch created before.

Selecting More opens an extendedPocketdefinition box providing detailedoptions for limitations, shape andextension of the pocket.

Figure 53 shows the basic pad and the cut,displayed in shaded view. The specification tree

contains the Padand the according Sketch.1.Underneath, the Pocketand Sketch.2,that it is

Figure 52: Extended Pocketdefinition box

Figure 53: Body including PadandPocket


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based on, are displayed. Any modification of the Pocketcan be carried out by simplyselecting a face of the Pocket, or by selecting the Pocket within the specification tree.A definition window of Pocket.1appears and modifications can be performed.

The Feature Groove

A Grooveis a negative Shaft, the definitionhappens similar to the function Shaft. The inputparameters have to be a Profileand a RotationAxis.

As reference plane of the Profilesketch a sideface of the basic Pad is selected.

The definition box prompts the Profileand theAxis.

Figure 56 shows thecomplete body including theremoved Groove.

Figure 55: Groovedefinition

Figure 56: Padwith PocketandGroove

Figure 54: Sketch of the Profi le


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The feature Hole

Holes and threads can be created on existing bodies using the feature Hole.

As an example, a Holeis appliedon the upper face of the Pad.Therefore the icon Hole isactivated and the accordingsurface has to be picked. Allrelevant input data are can bedefined in the dialog box. ThePositioning Sketch controls theposition of the Hole.

The desired Holemeasures 10mm(Diameter) x 10mm(Depth). The drillought to be anordinary one (V-Bottom) with an apicalangle of 120. TheHole ought to beperpendicular to the

surface.

Other options fordefining the Hole areshown subsequently.

Figure 57: Selecting the reference plane for the Hole

Figure 58: Holedefinition


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The Positioning Sketchof the Holeenables the definition of the Holelocation on the reference surface.

CATIA positions the coordinatesystem of the sketch at the placethat has been clicked at whendefining the reference surface forthe hole. If that point is alreadyconstrained (e. g. the point isalready fixed) a Positioning Sketch

is not needed.

Figure 60 shows thecomplete plate,including the Hole. Incase of changeingparameters, the defi-nition box can be

accessed by doubleclicking the Hole.

The following options are available in the definition window Hole:

Figure 59: Posi t ioning Sketchfor the Hole

Figure 60: Plate with Pock et, Groov e and Hole


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Extension:

The following settings are available:- Type of Relimitation of Hole

Limit ( Blind, Up to Next, Up toLast, Up to Plane, Up toSurface)

- Dimensions of the Hole.Direction(normal to the surfaceor along an axis)

- Location of the Hole, defined bya Positioning Sketch.

- Bottomof the Hole(FlatorV-Bottom)

Type:This menu allows the definition of acounterbore; several types arepossible. If chosen, the requiredparameters for the type are prompted.

Thread Definition:To create a Thread all parameters

have to be defined using the accordingwindow. The core diameter iscalculated by CATIA (in case ofstandard theads).When generating a 2D Drawing, theThread specifications in the drawingcan be created by CATIA itself.

Figure 61: Hole Definit ion , Extensio n

Figure 62: Hole Definit ion, Type

Figure 63: Hole Definit ion, Thread Definit ion


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Helpfu l addi t ional funct ions

Applying material

To apply material to theplate, the appropriatefeature has to beselected. A dialog boxopens, offering severalmaterial types. Theelement that has to besupplied with materialhas to be marked, as thematerial has to be. Byselecting Apply material,the material propertiesare assigned to thegeometrical element, andthe icon is displayed inthe Specification Tree.

Measure InertiaBeside the commonmeasure function forvalues and distances,the icon Measure Inertiaactivates a number ofmeasurings, such asvolume, mass, area orinertia using the setmaterial properties.Several options can beset, e.g. an axis or acoordinate system forthe inertia calculation,can be selected.

Figure 64: The dialog box for applying material

Figure 65: Measure Inertia


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Using Search

The feature Edit /Search can be useful

when looking forspecific elements.There are severalproperties to searchfor, such as Color,Type or Name. Whenusing Name, it ispossible to search forelements other thangeometrical items, e.g.Constraints.

Taking pictures of elements

CATIA offers a feature to take pictures of 3D models.Therefore Tools / Image / Capturehas to be selected.

A toolbar appears. The Options Icon opens a setupwindow.

To take the picture, the Capturebutton has to be picked. A previewof the image is shown. It can besaved by clicking the Save asicon.

Figure 66: TheSearchdialog box

Figure 69: The setup window (Opt ions)

Figure 67: The CaptureToolbar

Figure 68: The Capture Preview


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Examp le 8: Clevis

In tent ion : Design o f s imp le so l id bod ies

Figure 70: Clevis

Examp le 9: Lever


Figure 71: Lever


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Examp le 10: Prism piece


Figure 72: Prism Piece

Examp le 11: Sleeve


Figure 73: Sleeve


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Example 12: Pr ism with threaded ho les


Figure 74: Prism with threaded holes


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6.3. Dress -Up Features

The Dress-Up Featuresare used to implement constructive modifications on existing

solids, such as Chamfers, Filletsor Draft Angles.By means of an example these features are explained in detail.

Examp le 13: Ang le piece

Intent ion : Using the Dress-Up Features

Two Pads, rectangular to each other positioned, serve as a basis for this example.The first component measures 100 x 80 x 20 mm and is placed in the yz-plane. Thesecond component measures 60 x 60 x 20 mm and is positioned in the xz-plane.

Figure 76: Sketch of the first Pad

Figure 78: Sketch of the second Pad

Figure 75: First Pad

Figure 77: Creation of the second Pad


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The feature Fillet

After having selected the button Edge Fillet,a dialog box specifies the fillet, promptingthe Radius, the Propagation and, if desired, Limiting Elements (menu More). It ispossible to fillet more than one edge at once. When trying to fillet three or more edgesthat concur in an acute angle, the sequence of the filleting does indeed make adifference. It has to be stated, that the result depends on the order of the filletededges. Generally it is better to apply the fillets with bigger radii first.

The submenu Filletsprovides features for creating fillets with variable radii, betweentwo faces or defined by three tangent faces.

The anglepiece has tobe suppliedwith fillets withR=10mm onthe inneredges and afillet withR=5mm on the

vertical edge.

The Speci-fication Treeshows thenewly createdFillets beneaththe Pads.

Similar Filletscan be generated by use of the function Variable Radius Fillet. The

according radii have to be defined in a dialog box.

Figure 79: Creating a Fillet


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To modify the Filletdefinition,double clicked the Fillet (inthe specification tree or on

the solid in the workingspace) and redefine thevalues in the dialog box.

All single radii can be markedand modified in the definitionwindow.

Figure 81: Filleted body

The feature Chamfer

Two input options are selectable for the Chamferdefinition: - Length and Angle or- 2 Lengths.

The Angle is measured from the body surface, the Length is measured from theoriginal edge to the newly created edge of the chamfer. Several edges can be

selected to create several chamfers inone step.

The feature Chamferis inserted in the

specification tree.

Figure 83: Part with Chamfers

Figure 80: Defining a Variable Radius Fil let

Figure 82: Creating Chamfers


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The feature Draft Ang le

Draft Angle is used to create slant surfaces on a solid. These drafts are needed forspecific production procedures (die-casting, deep drawing, heavy stamping or others);so they are demoulded in predefined directions.

The Draft Analysiscan check bodies concerning their demouldability.

Annotation: It may be better to create the Draft Angle before filleting the body,because CATIA recognizes two filleted surfaces as one single face and applies theDraft Angle onto the complete surface. In the present example, delete the Filletsbefore creating DraftAngles.

When defining the Draft, the surfaces to beslanted are displayed red. The NeutralElement is displayed blue and representsthe section where the original dimension ofthe body (e.g. the thickness of the body) ispreserved. The demoulding direction isdisplayed with a red arrow.

Various parameters can be defined in thedialog box, such as Draft Angles and

options for the Propagationor Limitations.

The submenu Draftscontainsmiscellaneous definitionoptions.

Figure 84: Part without Fillets

Figure 85: Draft Definit ion


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Figure 86 shows the bodyincluding the Draft Anglesand the Fillets.

Checking the Draft (Draft Analysis)

To check the Part regarding its demouldability, the Draft analysis is the suitablefeature. The icon can be found in theAnalysistoolbar. Before picking it, the view modehas to be switchedto Shading withMaterial. TheCompassbutton inthe dialog box hasto be selected.Now, the compasscan be drawn with

the mouse to asurface normal tothe desireddemouldingdirection.Additionally, theelement to analysehas to be selected.This results in acolour coding,according to the

predefinedsettings. Figure87 shows the

Figure 86: Part with Draftsand Fil lets

Figure 87: Draf t Analysis


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analysis results of the drafted angle piece. Asthe check direction corresponds with the draftdirection, it is demouldable. This is shown bythe green colour, which identifies all surfaces

that feature an angle of 1 degree or more tothe demoulding direction. Surfaces with 0degrees are displayed blue, and those thathave less than 0 degrees are displayed red.

The feature Shell

Shellis used to hollow out bodies.

The definition of the Shellrequiresthe thickness (inside and outside)and the Faces to Remove.

CATIA V5 generates an open

shell element from the surfacedefinition of the basic body, takinginto account all geometryinformation.

Figure 90 shows the hollowed out body with a wallthickness of 5mm.

Figure 89: Defining a Shell

Figure 90: Shellelement

Figure 88: Surfaces that are notdemouldable with respect to the given

direction


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Feature Thickness

Thickness adds or

removes thicknesseson one (or more)faces, resulting innew boundariesparallel to the originalbody boundaries (e.g. for creatingallowances). Differentfaces can be definedwith differentthicknesses.Modifications ofdimension figures arecarried out by simplyclicking on them.

The features are displayed in the SpecificationTree. They can be modified, deleted or copied inthe Specification Tree.

Feature Thread

The feature Thread / Tap resembles the sub-feature of Thread definitionwithin the Holemenu.Unlike the latter, this feature allows the creationof taps. The Threads / Taps are specified bydefining the Lateral Face, Thread Depthand thenominal Thread Diameter.

Figure 91: Applying the feature Thickness

Figure 93: Part with Thickness

Figure 92: The Threaddefinition box


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Example 14: Bear ing bloc k

Intent ion : App l icat ion of Dress-Up Features

Figure 94: Bear ing block

Example 15: An gular pr ism

Intent ion : Part Design

Figure 95: Angu lar pr ism


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Example 16: An gle anchor p late wi th h oles


Figure 96: Angle anchor p late with ho les

Examp le 17: Mach ined partIntent ion : Part Design

Figure 97: Body


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6.4 Trans form ation Features

Transformation operations can be performed on bodies or

parts of bodies, using the Transformation Features.

Translat ion, Rotat ion, Symm etry: Translates, rotates or mirrors (without duplicating)bodies. These features are able to transform the selected solids without displacingtheir basic geometry (sketches etc.). Otherwise, design elements can be positionedusing the compass or 3D Constraints.

Figure 98: Starting a Transform ation Feature (Translat ion, RotationorSymm etry)

Mirror:

This symmetryfunction isduplicating theoriginal mirroredelement. It canbe used tomirror eitherbodies or partsof bodies.Therefore, thegeometry shouldbe set active (ormarked) in thespecification

tree BEFOREselecting theMirrorbutton.

Figure 99: Mirroring a Pad


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Patterns:

The Pattern features (Rectangular Pattern, CircularPattern and User Pattern) enable the duplication of

design elements using special positioning definitions.

The Rectangular Pattern Definition requires twotranslation directions, the according Instancenumberand the Spacing. Parameters offers several optionsfor the input.The Reference Element defines the translationdirection, the Object to Pattern is the element that isduplicated.The second direction is defined in a similar way.

The dialog box of the Circular Patternrequires the Instancenumber, theAngularSpacingand the definition of a ReferenceElementdefining the rotation axis. CrownDefinition offers more input optionsconcerning a pattern in radial direction.

The feature User Pattern Definitionsupportsthe individual definition of the duplication ofgeometrical elements. To define the

positions, a sketch can be created, containinganchor points.

Scal ing:

This feature scales elements to the specifieddimension. Scaling can be carried out with respect toa point or a direction (line or normal to a plane).

Figure 100: Rectangular PatternDefinit ion

Figure 101: Circular Pattern Definit ion

Figure 102: User Pattern Definit ion

Figure 103: Scal ing Def in i t ion


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Examp le 18: Dri l led Panel

Intent ion : Transfo rmat ion Features

Figure 104: Drilled Panel

Beisp iel 19: Angle bracket

Intent ion : Transformat ion Features

Figure 105: Angle bracket


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Example 20: A ster isk sh aped b racket

Intent ion : Transformat ion Features

Figure 106: Asterisk shaped bracket


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7 Part Desig nwith severalBod iesand BooleanOperat ions

The creation of complex bodies is supported by logic connection of Bodies. The logicoperations (Boolean Operations) concern two bodies. The first body has to be active(Define in Work Object) and serves as a basic element. The second body affects thefirst one and is integrated in the first body in the Specification Tree.

Figure 107: Inserting a new Body

A new body can be inserted in theSpecification Tree using Insert /Body. The new body is set the InWork Objectautomatically. The two

Bodiesare considered independentelements; one can be edited withoutaffecting the other. The Bodies canbe switched to the noshown spaceautonomously, for instance.

Annotation: Modifications arecarried out at the active body.Bodies can be activated by doubleclicking the desired branch of the

specification tree (for features asSketch, Pad, ), or by picking theelement with the right mouse button and selecting Define in Work Object(for Bodies).

Figure 108: Partcontaining two Bodies


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When clicking on an element with the right mouse button and picking Properties, userdefined setting can be adjusted, such as renaming the design elements, changing thegraphic representation or retrieving the object status.

Figure 110: Defining the In Work Object

7.1 Boo lean Operat ion s

The Boolean Operations are accessed via the pull down menu Insert / BooleanOperations or the

toolbar BooleanOperations.

The features can bedivided into threegroups:

- adding- subtracting or- intersecting

independent bodies.

Figure 109: Propert iesdialog box

Figure 111: Accessing the Boolean Operat ionsmenu


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This example uses two Bodies.Figure 113 shows the result of a Remove operation; Body 2has been removed fromPart Body.Body 2is integrated into the Part Bodyin the Specification Tree.

The following figures show miscellaneous Boolean Operations; all of them have beencarried out using the same boundary conditions (PartBodyas In Work ObjectandBody 2marked).

The features Assemble, Union Trim andRemove Lump are exemplified in the

following examples.

Annotation: CATIA regards the PartBody as the first basic body. It can bemodified using construction features, but the PartBodycannot be removed. Thereforeit is important to consider the structure of the specification tree, especially for morecomplex parts.The PartBody can be changed: Select the Body that should be defined the newPartBodywith the right mouse button and select Body.x / Change Part Body.

The following example is going to show how to use Boolean Operations.

Figure 113: Result of Removing B ody 2fromPartBody

Figure 112: Result of Adding Par tBody andBody 2

Figure 115: Dialog box of the Removefeature

Figure 114: Result of In tersect ing PartBod yand Body 2


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Examp le 21: Piston of a two -stroke engine

Intent ion : Part Design in clud ing several bodies and Bo olean Operat ions

Figure 116: Piston of a two-stroke engine

A piston of a 175 ccm two stroke engine has to bedesigned. The two ring grooves are needed for thecompression rings. The piston-pin bearingsdiameter measures 15mm. For simplificationreasons the grooves for the piston-pin retainers,the piston-ring retainers and the draft angles of the

piston were disregarded. The dimensions of thepiston are defined in Figure 116.

Figure 117: Specification tree ofthe piston

Figure 118: 3D views of the piston


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The Specification Treeshows that the part is built from three bodies:Outer ContourInner ContourPiston-Pin Bearing Support

The Outer Contourrepresents theoutline of the piston. It can becreated using the feature Shaft.

The inner contour consists of twobodies. The body Inner Contourconsists of a Shaft, the Piston-PinBearing Supportis a Pad.

The body Piston-Pin Bearing

Support is being removed fromthe Inner Contour using theBoolean Operation Remove. It iscommended that the Fillets becreated as soon as possible, i.e.just after the Boolean Operation.

The Inner Contour is removedfrom the Outer Contour. At lastthe Hole for the Piston Pin is

applied (feature Hole) andmirrored.Of course other design strategies arepossible. The example above shows away that uses Boolean Operations tocreate a Partfrom several Bodies.

Annotation:When designing a partthat should be suitable for production,it is advantageous to design theoutlines of the cast part and the

machining separately. For the pistonthis strategy would result in an OuterContourcontaining the draft angle andallowances. The machining is createdin a body containing the final contourand the holes. One advantage of thisstrategy is the 3D model of the castcontour that can be directly accessed.The Machining body can beinactivated and the cast contour canbe used as basis for the NC

programming of the manufacturingmachine for mould building.

Figure 120: Inner Contourof the piston

Figure 119: Creating the Outer Contour


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Example 22: Conro d


A conrod for a two-stroke engine has to be designedaccording to the drawing above. As displayed in theSpecification Tree, the symmetry of the part can beconsidered. Special attention has to be paid to thefillets and the draft angles. (Annotation: The conrodis machined at the bearings and at the side contactfaces of the bearings.)

Figure 122: Conrod

Figure 121: Specification tree of the conrod


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8. The Specif ic at ion Treein Part Desig n

The Specification Treecontains all elements of the actual Part.

Not only the geometrical elements, but also the coordinatesystems and constraints are shown. The levels are marked byvertical lines. The sub trees can be opened or closed in differentways, either by clicking on the nodes (+) or (-), or with thefeature Tree Expansionin the pull down menu View.When clicking on a branch of the Specification Tree, the treecan be edited and the Part itself is shaded dark. Clicking on abranch again reactivates the Part.The active element of the Partis underlined in the SpecificationTree (Figure 123: Sketch.1).To activate another element, clickon it with the right mouse button and choose Define In WorkObject.To hide (or show) the Specification Tree,hit the F3-button.

Figure 124 displays the Specification Tree ofthe conrod, showing a typical structure of asimple Part in CATIA V5. The conrod is built

from a basic Body (Pad.1) that is modifiedusing Pockets and Holes. The Dress-upFeatures Draft and Edge Fillet complete thepart, which represents one half of the conrod.At last it is duplicated using theTransformation Feature Mirror.

Figure 123:Specif icat ion Tree

Figure 124: Specif icat ion Treeof thecon

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