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CATIA V5

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AIRBUS UK

CATIA V5 Foundation Course

Foundation Course SketcherCompiled by: Kevin Burke Approved by: Authorised by:

Kevin BurkeDate: 16/Apr/2003 Date: Date: AIRBUS UK Ltd. All rights reserved.

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AIRBUS UK

CATIA V5 Foundation Course

Contents Session 3 The Sketcher Workbench ......................................3An Introduction to Sketcher ...................................................................................... 4 Renaming a Node name on the Specification Tree ................................................... 5 Accessing the Sketcher Workbench.......................................................................... 6 Selecting a Sketch Plane ....................................................................................... 7 The Sketcher Workbench .......................................................................................... 8 Sketcher Toolbars and Icons ................................................................................... 10 Selecting and Positioning Geometry....................................................................... 12 The Profile Toolbar ................................................................................................. 14 The Profile Icon................................................................................................... 14 Pre-Defined Profiles............................................................................................ 18 Circles and Arcs .................................................................................................. 22 2D Splines ........................................................................................................... 24 Conical Shapes .................................................................................................... 25 Lines .................................................................................................................... 26 Axis Line ............................................................................................................. 29 Points................................................................................................................... 29 Editing the Definition of an Element ...................................................................... 32 The Operations Toolbar .......................................................................................... 33 Create 2D Fillets.................................................................................................. 33 Relimitation or Trim functions............................................................................ 36 Transformation Tools.......................................................................................... 39 3D Geometry....................................................................................................... 45 Cutting the Part by Sketch plane ......................................................................... 49 Constraints............................................................................................................... 50 Constraint and Element Colours ............................................................................. 51 The Constraints Toolbar.......................................................................................... 53 Create Constraints using a dialog box................................................................. 53 Create Constraints by selecting elements............................................................ 54 Create Automatic Constraints ............................................................................. 56 Animates Constraints .......................................................................................... 58 Managing Constraints ............................................................................................. 58 Linking Constraints Together.................................................................................. 60 Further Sketcher Options ........................................................................................ 63 An alternative way of entering Sketcher ............................................................. 63 Editing a Sketch .................................................................................................. 64 Changing the Sketch Support.............................................................................. 64 Sketch Analysis Tool .......................................................................................... 65

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CATIA V5 Foundation Course

Session 3 The Sketcher WorkbenchOn completion of this session the trainee will: Be able to access the Sketcher Workbench. Understand the Sketcher Toolbars and Icons. Be able create and manipulate 2D Geometry. Be able to apply and manipulate Constraints.

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CATIA V5 Foundation Course

An Introduction to SketcherThe primary use for Sketcher is for the user to define precise and rapid 2D profiles, which can then be used in the definition of surfaces and solids. Within a sketch you can create 2D-wireframe geometry which can be used to produce Solids or surfaces and is represented by a solid line font. 2D-construction wireframe geometry can also be created which is used as an aid to produce the solid 2Dwireframe geometry. To position and control the size of the sketch, geometric and positional constraints are used which are displayed in green. A Sketch Node will be attached to the Specification Tree in which the Sketch Axis, Geometry and Constraints details are held. The Specification Tree can be expanded by selecting the + symbol on the Tree Branch or collapsed by selecting the - symbol. Specification Tree

Geometric Constraints

Wireframe Geometry

Construction Wireframe Geometry

Dimensional Constraints

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CATIA V5 Foundation Course

Renaming a Node name on the Specification TreeYou can edit the name of a node on the Specification tree by selecting it with MB1 followed by MB3 to display a contextual menu. Now select Properties to display a Properties panel for the selected

Node name to be edited

In the Feature Name field on the Feature Properties tab is the name of the Node. Select this field and enter the new name for the Node and click OK to apply the change.

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CATIA V5 Foundation Course

Accessing the Sketcher WorkbenchTo access the Sketcher workbench select > Start > Mechanical Design > Sketcher from the Start drop down menu or select the Sketcher Icon from any workbench that allows sketches to be created.

If a CATPart is not active a new part will be activated and you will be prompted to enter a part name by following panel on the desktop. Enter a name and click on OK and a new CATPart will open.

Note: If the part is to be stored on the vault the name must be in uppercase and conform to the relevant project naming convention.

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CATIA V5 Foundation Course

Selecting a Sketch PlaneThe sketcher icon will now be orange and you will be prompted to select a plane, a planar face or a sketch this is known as the Sketch Support. Select the required plane, face or sketch and the catia desktop will switch to the sketcher workench and graphic display.

Select a Plane from the Specification Tree or Graphically. For additional information on creating user defined Planes see the Part Design Session

Select a Planar face on an existing solid

Select an existing Sketch on the Specification Tree

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CATIA V5 Foundation Course

The Sketcher WorkbenchPart Specification Tree Sketch Axis Sketch Grid Geometry Sketcher Workbench Toolbars

Sketch Tools Toolba

On entering the Sketcher graphics window a Yellow 2D Axis is displayed containing a vertical Axis V, a Horizontal Axis H and a origin point. This is the Sketch Absolute Axis and you can use these elements to position geometry on the sketch plane by the use of Constraints.

H Axis V Axis

Sketch Origin DMS42188 ANUG0300111 Page 8 of 65 Issue 1

AIRBUS UK

CATIA V5 Foundation Course

The graphic display area will have a Grid displayed on the sketch plane to which geometry can be snapped. It is possible to change sketcher interface features such as the grid size by selecting Tools>Options from the Tools drop down menu followed by the Mechanical Design>Sketcher branch on the displayed panel. The Grid section controls the visibility, size and whether grid snapping is used. The Sketch Plane section allows the sketch plane to be shaded and to automatically position the sketch plane parallel to the screen. The Geometry section allows the creation of circle/ellipse centre points and the manipulation of geometry by the use of the mouse. The Constraints section switches on automatic constraints where appropriate. The Colors section controls element colours.

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AIRBUS UK

CATIA V5 Foundation Course

Sketcher Toolbars and IconsThere are four main toolbars within the sketcher workbench: 1. Profile Creation used for the creation of geometric elements. Selection Icon 2. Operations for dressing-up (Filleting, Trimming, etc.) and manipulating geometry (Mirroring, Trans