Topic outline

➢Introduction
➢Sketcher workbench
➢Part Design workbench
➢Drafting Workbench
➢Assembly Design Workbench

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 Introduction
CATIA Overview
• CATIA :
➢Computer Aided Three-Dimensional Interactive
Application.
➢Incorporates CAD, CAM, CAE, and other
applications
➢Completely re-written and still under development
➢User friendly icon based graphical user interface
➢Encourages design flexibility and design reuse
➢Supports Knowledge Based Design

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 Int…
• A Flexible Modeling environment
➢Ability to easily modify models, and implement design
changes
➢Support for data sharing, and data reuse
•Knowledge enabled
➢Capture of design constraints, and design intent as well as
final model geometry
➢Management of non-geometric as well as geometric design
information
•The 3D Part is the Master Model
➢Drawings, Assemblies and Analyses are associative to the 3D
parts. If the part design changes, the downstream models will
change too.

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 Int…
• CATIA Applications:
➢Product Structure ➢Photo Studio
➢Sketcher ➢4D Navigator (including
➢Part Design kinematics)
➢Assembly Design ➢Manufacturing
➢Drafting (Interactive and ➢Finite Element Analysis
Generative)
➢Wireframe and Surface
➢Digital Shape Editor
➢Knowledge ware
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 Sketcher work bench
•The Sketcher workbench is used to draw precise sketches and 2D
shapes.
•There are three standard tool bars found in the Sketcher Work Bench.
Operation Tool Bar, Profile Tool Bar and Constraints Tool Bar
• Some tools have an arrow
located at the bottom right of
the tool icon. The arrow is an
indication that there is more
than one variation of that
particular type of tool.

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Sketcher work bench

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Sketcher work bench

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Sketcher…

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 Sketcher…
Sketches of Conic sections

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 Sketcher…
• Elongated Holes Cylindrical elongated Holes

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 Sketcher…
• Drawing Keyhole Profiles and Hexagons

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 Sketcher…
• Trimming Unwanted Sketched Elements

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 Sketcher…
• Filleting, Chamfering and mirroring Sketched
Elements

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 Sketcher…
• Mirroring, scaling and rotating Sketched Elements

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 Sketcher…
• Applying Dimensional Constraints on sketches
➢After applying the geometric constraints, you need to
apply the dimensional constraints to fully define the
sketches, using the Constraint tool.
➢Choose the Constraint button from the Constraint
toolbar or the Constraint Creation tool bar shown in
the figure.

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 Sketcher…
• CONCEPT OF CONSTRAINED SKETCHES
Generally, after drawing the sketch and applying the
constraints, the sketch can exist in any one of the
following three stages:
➢Iso-Constrained: An Iso-Constraint sketch, also known as
fully constraint sketch, is the one in which all degrees of
freedom, of each element, are defined using the
geometric and dimensional constraints.
➢Under-Constrained: An Under-Constrained sketch is one
in which all degrees of freedom, of each entity are not
completely defined using constraints.
➢Over-Constrained An Over-Constrained sketch is the one
in which some extra constraints are applied.
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 Sketcher…
• ADDING GEOMETRICAL CONSTRAINTS

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 Sketcher…
• Editing Multiple Dimensions
➢To use the Edit Multi-Constraint tool, you first need to
apply all the required dimensions to the sketch.
➢Next, choose the Edit Multi-Constraint button from
the Constraint tool bar; the Edit Multi-Constraint
dialog box will be displayed, as shown in the figure.

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 Sketcher…
• EDITING AND MODIFYING SKETCHES
➢Modifying the Sketched Circle
➢Modifying the Sketched Arc
➢Editing conic sections
➢Modifying the Sketched parts and elements
➢Deleting Sketched Elements

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 Sketcher…
• Examples

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Sketcher…

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Sketcher…
Exercises

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 Part Design workbench
• The Part Design application is used to create solid
models of parts
•Solid parts are usually created from 2D profiles that are
extruded or revolved to form a base feature
•The Part Design task is tightly integrated with a 2D
sketching tool
•A library of features is provided to allow user to add
additional details to a base part
•Parts can be modified by selecting their features in the
specification tree
•Parts are stored in files with the extension .CAT Part
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 Part Design workbench
Invoking part design work bench

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 Part Design…
▪Part design Tool bars

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 Part Design…
• Sketcher
➢The sketcher is used to create 2D sketches of designs,
and apply constraints to the sketched geometry
➢It allows you to quickly draw the approximate shape
of a design, and then assign constraints to complete
the shape definition
➢The sketcher is now the main environment for
developing 2D profiles that will be used to build solid
models
➢Solids can only be created from sketches that form a
single closed boundary

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 Part Design…
• EXITING THE SKETCHER WORKBENCH
➢Choose the Exit work bench button from the Work
bench toolbar; you will exit the Sketcher workbench and
the Part Design workbench is invoked.

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 Part Design…
• Creating a Solid Part from a Sketch

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 Part Design…
Creating a Pocket feature

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 Part Design…
Creating solid part using Shaft and pocket feature using shell

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 Part Design…
• Creating Drafted Filleted and Multi Pad Features

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 Part Design…
• Creating Multi-pocket & Groove Features

The multi-pocket
feature

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 Part Design…
• Creating Rib Features

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 Part Design…
• Creating Slotted Features

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 Part Design…
• Making a Hole

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 Part Design…
• REFERENCE ELEMENTS
➢ The reference elements are the features that have no mass and
volume and are used only to assist you in the creation of the
models.
➢ You can invoke the tools to create reference elements using the
Reference Elements toolbar, as shown in the figure.

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 Part Design…
• TRANSFORMATION FEATURES
➢Translating, Rotating and creating symmetry feature
Bodies: Invoke the Transformations toolbar as shown.

➢Mirroring Features and Bodies

➢Scaling Models

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 Part Design…
• Assigning Materials
• To Assign a material click on the Materials Icon on the
toolbar, Select a material from the material library,
Click on the part you wish to assign.
• The material will appear on the properties branch in
the specification tree
• Note: You may need to change the option settings To
make the parameters branch of the specification tree
visible.
• Tools->Options->Infrastructure->Product Structure
Specification Tree -> Parameters
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 Part Design…
• Modifying a Part
➢All parts created in Part Design can be edited at any time
in the life of the part
➢The parameters used to create a feature can be accessed
by double clicking on the feature definition in the
product specification tree or on the part geometry
➢For example to change the height of a pad you should
double click on the pad node in the specification tree.
➢When you have modified the feature parameters the
part will automatically update. The part turns red briefly
to indicate that it is out of date
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 Part Design…
Examples

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 Part Design…
Examples

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 Part Design…
Examples

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Part Design…

Exercises

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 Drafting Workbench
• Generating a Draft
➢The Generative Drafting Application allows you to create
2-D engineering drawings from 3-D parts or assemblies
➢Generative Drafting automatically lays out orthographic
projections of a part onto a drawing sheet
➢Interactive drafting involves creation of views with out
using 3-D models and assemblies and hence there will
be any with the 3-D.
➢Traditional or manual Drafting functions can be used to
annotate the drawing layout
➢Drawings are stored in files with the extension .CAT
Drawing
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 Drafting…
• Invoking Draft workbench and Selecting drawing
standards

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 Drafting…
• Drafting tool bars

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 Drafting…
• Drafting tool bars

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 Drafting…
• Automatic Insertion of the Frame and Title Block
➢Menu: Insert > Drawing > Frame and Title Block
➢Toolbar: Drawing > Frame Creation

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 Drafting…
• Manual Insertion of the Frame and Title Block
➢Menu: Insert > Geometry creation >Line
➢Toolbar: Geometry creation >Line
➢Add annotations

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 Drafting…
• Editing or modifying the lay out

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 Drafting…
• Creating Part Drawing

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 Drafting…
• Creating Front View

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 Drafting…
• Creating Projection View

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 Drafting…
• Creating Auxiliary View

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 Drafting…
• Creating Sectional View

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 Drafting…
• Creating Detail View

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 Drafting…
• Automatic and manual Insertion of Dimensions
➢Menu: Insert > Generation > Generate Dimensions Step
By Step OR
➢Toolbar: Generation > Dimension Generation > Generate
Dimensions Step By Step
➢Menu: Insert > Dimensioning > Dimensions >
Dimensions
➢Toolbar: Dimensioning > Dimensions

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 Assembly Design Workbench
• Introduction
➢ Very few finished designs are a single part. Usually a finished
design consists of several to millions of individual parts to define
them.
➢ The Assembly Design application allows you to create a product
model from a number of separate parts
➢ The parts in a product assembly are not joined together, but
assembled as they would be in a physical assembly
➢ The product assembly structure is hierarchical and allows you to
model complex product relationships
➢ Constraints can be applied between the parts in assembly to
define relationships between them
➢ Benefits of Assembly Modeling
• Support for reuse of standard parts
• Management of inter-part relationships
• Development of Kinematics models
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 Assembly Design…
• Invoking Assemble workbench

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 Assembly Design…
• Assemble design tool bars

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 Assembly Design…
• Considering Assembly Constraints:
➢Coincidence Constraints: aligns axes, planes and points
➢Contact Constraints: a tool for creating contacts between 2
planes or surfaces
➢Offset Constraint: defines a desired offset distance between
two elements
➢Angle Constraints: A way to define an angular relationship
between two elements
➢Fix Component: A way to FIX a part “in space” so that it will
always remain there. Other parts can be constrained relative
to a Fixed component
➢Fix Together: Fixes two parts together (forever)
➢Flexible/Rigid Subassembly: in a flexible sub, parts and
components can be moved regardless of the fact if it (or
they) are the active component
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 Assembly Design…
Menu: Insert > Existing Component
Toolbar: Product Structure Tools > Existing Component

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 Assembly Design…
•Moving Individual Components using
Manipulation tool bars

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 Assembly Design…
• Applying Constraints
➢ Fixing a component ➢Coincidence constraint
Cco

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 Assembly Design…
➢Contact constraint
Nut

Body

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 Assembly Design…
➢ Final Assemble ➢Exploded view

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 Assembly Design…
• Drafting an Assembly product

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 Assembly Design…
• GENERATING THE BILL OF MATERIAL (BOM)

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 Assembly Design…
• GENERATING THE BILL OF MATERIAL (BOM)
➢Generate Numbering ➢BOM

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 Assembly Design…
• ANALYSING BILL OF MATERIAL (BOM)

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 Assembly Design…
• GENERATING THE BILL OF MATERIAL (BOM)

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 Assembly Design…
• GENERATING THE BILL OF MATERIAL (BOM)

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