Edu Cat e v5f Ff v5r15 Lesson07 Toprint(1)

7/27/2019 Edu Cat e v5f Ff v5r15 Lesson07 Toprint(1)

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CATIA V5 Fundamentals - Lesson 7: Finalizing Design Intent

Copyright DASSAULT SYSTEMES

Lesson ContentCopyrightDASSAULTSYSTEMES

Lesson 7: Finalizing Design Intent

In this lesson, you will learn how to analyze a model and create formulas.

Lesson content:

Case Study: Finalizing Design Intent

Design Intent

Stages in the Process

Applying Material Properties

Analyzing the Model

Formulas

Duration:Approximately 0.5 day


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Case Study: Finalizing Design IntentCopyrightDASSAULTSYSTEMES


The case study for this lesson is the table used in the Drill Support assembly and shown below.The table is part of the Stand sub-assembly. This case study focuses on applying material to themodel, analyzing its mass properties, verifying dimensions, and creating formulas to ensuredesign intent is maintained when modifications are applied.


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Design Intent (1/2)

The table must meet the following designintent requirements:

The model must be made of aluminum.

The material selected for this part isaluminum. The material properties ofaluminum in the CATIA library will meet the

requirements.

Model geometry must adhere to thefollowing criteria (which can be verified

using measurement tools and enforcedusing formulas):

a. Create a hole that is always 2mm abovethe top of the bottom oblong holes andcentered horizontally.

b. Overall width must be 80% of the length(L).

a L

b


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Case Study: Finalizing Design IntentCop

yrightDASSAULTSYSTEMES

Design Intent (2/2)

Model geometry must adhere to thefollowing criteria (continued):

c. The thickness of the model is always 1%the length (L).

d. The thickness of the ribs is two times thethickness of the model.

L

c

d


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Case Study: Finalizing Design IntentCop


Stages in the Process

Use the following steps to finalize the design intent:

1. Apply material properties.

2. Analyze the model.

3. Create formulas.


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Step 1 - Apply Material PropertiesCop


Step 1: Apply materialproperties.In this section, you will learn how toapply and view material on your model.

To finalize the table, use thefollowing steps:

1. Apply material properties.2. Analyze the model.

3. Create formulas.

Finalizing Design Intent


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Material Properties

Material can be applied to any part in CATIA.The material properties (e.g., density) affect themass properties of the part. CATIA has adefault library of materials already installed.Your company may also have custom materialscreated to conform to your requirements.


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Applying Material Properties (1/2)

To apply a material to a model, use thefollowing steps:

1. Select the part in the specification tree

2. Select the Apply Material icon.3. Select the material (e.g., Aluminum from

the Metal tab).

4. Select Apply Material.

5. Select OK. The material is added to the

model.

5 4

3

2

1 Use the Open MaterialLibrary icon inside theLibrary window tobrowse to other materiallibraries your companymay have.


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Applying Material Properties (2/2)

Material properties can be altered using thefollowing steps:

1. Select the material in the specification

tree.2. Click Properties from the right mouse

button pop-up menu.

3. Select the Analysis tab to change thematerial properties.

4. Select OK to apply the changes to thematerial properties.

2

1

3

4

Modifying the propertiesof the material affectsonly the current part, notall parts using thismaterial.


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Viewing Material on the Model

You can view the material on the model usinga customized view. To view the material usethe following step:

1. Click View > Render Style > Shadingwith Material or select the Shading withmaterial icon.

2. The material is rendered onto the model.

2

1

You can change thecharacteristics of therendering from theRendering tab of theProperties window forthe material.


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Step 2 Analyze the ModelCop




2. Analyze the model.3. Create formulas.

Step 2: Analyze themodel.In this section, you will learn how to usethe measurement tools available inCATIA.



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Step 2 Analyze the ModelCopyrightDASSAULTSYSTEMES

Analysis Tools

Several tools are available inside the Part Design workbench to analyze a model.

There are three types of measure tools in the Measure toolbar :

A. The Measure Between tool measures the distance between elements in a model.

B. The Measure Item tool measures a specific element in a model.

C. The Measure Inertia tool calculates the mass properties of the model.

All measurements can be saved in the specification tree by selecting the KeepMeasure option.

A B C


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Element Selection (1/2)

When you are selecting elements formeasurement, the cursor icon indicates thetype of element being selected. The followingtypes of elements may be indicated:

A. Cylindrical surface

B. Plane or planar surface

C. Arc center

D. Line

E. Point

This helps to ensure that you are selecting theintended element to measure.

A

B

C

D

E


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Element Selection (2/2)

Another way to ensure you are selecting the intended element is to isolate the type of element youwant. This is done using the selection mode pull-down menus.


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Measure Between Modes

Measure between modes is used to measurebetween two elements in a model.

There are three different modes:

A. In Standard Mode, both elements mustbe selected with each measurement.

B. In Fan Mode, measurements are madebetween the first element selected andeach element selected thereafter.

C. In Chain Mode, the second element

selected for a measurement automaticallybecomes the first element for the nextmeasurement.

A

B

C


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Step 2 Analyze the ModelCo

pyrightDASSAULTSYSTEMES

Measure Between (1/2)

Use the following steps to measure betweenelements a model:

1. Select the Measure Between icon.

2. Select the Definition type. In thisexample, Standard Mode is selected.

3. Select the reference element.

4. Select the target element.

1

4

3

2


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Measure Between (2/2)

Use the following steps to measure betweenitems in a model (continued):

5. Minimum distance and angle are

displayed on the model and in the resultsdialog box.

6. Select the Keep Measure option to savethe measurement.

7. Select OK to complete the measurement.

8. If the Keep Measure option was selected,

the measurement remains on the modeland is added to the specification tree.

5a

5b

6

78

Saved measurementscan be used informulas. This is taughtlater in this lesson.

Use Hide/Show to hidethe display of savedmeasurements.


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Measure Item (1/2)

The Measure Item tool lets you measureindividual geometric elements. Use thefollowing steps to measure an item:

1. Select the Measure Item icon.2. Select the geometric element to be

measured.

3. The properties of the selected geometricelements are displayed on the model andin the results window.

1

2

3b

3a

Select Customize tocalculate properties,such as Center ofgravity for surfaces andvolumes, Directionvector for an edge, etc.


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Measure Item (2/2)

Use the following steps to measure an item(continued):

4. Select the Keep Measure option to save

the measurement.5. Select OK to complete the measurement.

6. If the Keep Measure option was selected,the measurement remains on the modeland is added to the specification tree. 4 5

6



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Components Option (1/2)

By default, measurements report the the shortest distance between two elements. To obtain thecomponent distances (i.e., distances in the X, Y, and Z directions) relative to a coordinate system,select Customize and select the Components option. The component distances are displayed inthe Results section.

If you want ameasurement in aspecific direction todisplay on the model,create a reference planenormal to the measureddirection and measureto it. Exercise 7Adiscusses this method.


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Components Option (2/2)

The default X, Y, and Z directions are based on the default axis system for the model. You canchoose an alternate axis system using the Other Axis option. The component distances of themeasurement are then based on the selected axis.

Default Axis

User-defined axis


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Mass Properties

Mass properties can be calculated using theMeasure Inertia tool. This tool can measurethe following:

A. 3D properties, which are calculated onsurfaces (e.g., feature faces) andvolumes (e.g., features and PartBodies).

B. 2D Properties, which are calculatedinertia properties on planar 2D surfaces.

The results of 3D and 2D inertia calculationscan be customized to report the desiredresults. The Measure Inertia Customizationwindow displays the types of results that canbe reported, including mass properties (e.g.,volume, mass, and center of gravity).

A

B


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Measure Inertia (1/2)

Use the following steps to calculate 3D massproperties with the Measure Inertia tool:

1. Select the Measure Inertia Icon.

2. Select the PartBody from thespecification tree.

3. Review the results in the display window.

4. The center of gravity is displayed on themodel.

1

3

2

4



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Measure Inertia (2/2)

Use the following steps to calculate 3D massproperties with the Measure Inertia tool(continued):

5. If required, select Customize to changedisplayed results.

6. Select the Keep Measure option to savethe results.

7. Select OK to complete the measurement. 56

7

5


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Creating Measurement Geometry (1/2)

All measurement tools have an option tocreate geometry. Points, lines, and axissystems can be created to illustrate themeasurement.

By default, the resulting measurementgeometry is associative. Should the element(s)referenced by the measurement geometrychange, it updates accordingly. This can bemade non-associative, so that the

measurement geometry remains static whenchanges occur in the model.

First point

Second point

Line


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Creating Measurement Geometry (2/2)

Use the following steps to createmeasurement geometry:

1. Activate the measurement tool and

perform the measurement.2. Select the Keep Measure option.

3. Select Create Geometry.

4. Select the icon that corresponds to thegeometry needed. When performing aMeasure Inertia, for example, you have

the option of creating a point at the centerof gravity or an axis system.

5. Set Associativity.

6. Select OK.

7. Select OK to complete the measurement.

8. The measurement geometry is added tothe model and to the specification tree.

8

7

6

5

4

3

2

1

8


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Update

When the Keep Measure option is selected,the measurement is added to the model.Although the measurement is associative, bydefault, it will not update automatically withchanges to the model. If a measurement

needs to be updated, the Measurement icon inthe specification tree is displayed with theUpdate symbol, as shown. Right mouse clickon the measurement and click Local Update.

To automatically update measurements, applythe Automatic Update option from Tools >Options > Infrastructure > PartInfrastructure > General.

C


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Exercise 7ACopyrightDASSAULTSYSTEMES

Exercise 7A

In this exercise, you will take measurements of an existing model. You willpractice using the measurement tools and learn when to use each type. Detailedinstruction for this exercise is provided.

By the end of this exercise you will be able to:

Apply material to a model

View material on a model

Take measurements on an element

Take measurement in between elements

Calculate mass properties of a model

15 min

CATIA V5 F d t l L 7 Fi li i D i I t t


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Exercise 7A (1/11)

1. Open existing part file.

The part used in this exercise has already been

created for you.

a. Select the Open icon.

b. Open Ex7A.CATPart.

2. Apply material to the model.

The model is to be made of steel.

a. Select the part on the specification tree.

b. Select the Apply Material icon.

c. Select the Metal tab.d. Select Steel.

e. Select Apply Material.

f. Select OK to close the dialog box.

2e2f

2d

2c

2b

2a

CATIA V5 Fundamentals Lesson 7: Finalizing Design Intent


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Exercise 7A (2/11)

3. View material.

To view the material on the model, use the

Shading with Material view mode.

a. Select the Shading with Material icon.

b. Return back to Shading with Edges.

4. Measure arc length.

Use the Measure Item tool to determine thearc length of a filleted corner.

a. Select the Measure Item icon.

b. Place the curser over the arc until thecurser changes to the icon shown.Left mouse click to accept theelement, and read the results.

c. Select the Keep Measure option.

d. Select OK to close the dialog box.

4b

4d

4c

4a

3a



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Exercise 7A (3/11)

5. Measure the angle between twoelements.

Use the Measure Between tool to determinethe angle between the bottom surface andthe drafted sides.

a. Select the Measure Between icon.b. Select the bottom surface.

c. Select the side surface.

d. The system calculates the distancebetween these two elements.

e. Select Customize.

5e

5c

5b

5a



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Exercise 7A (4/11)

5. Measure the angle between twoelements (continued).

f. Clear the Minimum distance/Curvelength option and verify that the Angle

option is selected.

g. Select OK.

h. Select Keep Measure option , if notalready selected.

i. Select OK.

5i

5h

5g

5f



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Exercise 7A (5/11)

6. Measure between two elements.

Use the Measure Between tool to calculate

distance.

a. Select the Measure Between icon.

b. Select the side face.

c. Place your curser over the first holeuntil an infinite line displays; this isthe holes implicit axis. Left mouseclick once the axis displays.

d. The required measurement is thedistance between these two elements

in the X direction. Currently, themeasurement calculated is the anglebetween the two elements.

6c6b

6a



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Exercise 7A (6/11)

6. Measure between two elements(continued).

e. Select Customize.

f. Select the Components and Minimumdistance/Curve length options. Clearthe Angle option.

g. Select OK.

h. Notice that the X, Y, and Z distanceare now displayed. The X distance isrequired. By selecting the KeepMeasurement option, the componentsare added to the specification tree. Inthis case, however, you are requiredto display the X direction distancedirectly on the model. To do this, youneed to create a reference plane.

i. Select Customize and clear theComponents option.

j. Select OK.

k. Select Cancel.

6h

6f

6f You may need tocustomize themeasurement to displayminimum distance/curvelength.



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g g



Exercise 7A (7/11)

7. Create a reference plane.

Create a reference plane through the edge

and normal to the YZ plane so that thedistance in the X direction can be calculated

and displayed on the model.

a. Select the Plane icon. If you cannotfind the icon, enter [c:plane] in thepower input line.

b. Create a plane that is normal to theYZ plane and through the vertex.

7b



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g g



Exercise 7A (8/11)

8. Use Measure Between in Fan Mode.

Use the Measure between tool in Fan mode to

calculate multiple dimensions.

a. For clarity, hide the existingmeasurements.

b. Select the Measure Between icon.

c. Select Measure Between in Fan Mode.

d. Ensure the Keep Measure option isselected.

e. Select the plane created in the laststep as the first element.

f. Select the center of the hole as thenext element.

g. Select the center of the next hole asthe next element.

h. Select the edge as the final element.

i. Select OK.

8e8f 8g

8h

8i

8d

8c

8b

By creating the plane,the distance iscalculated from thevector normal of theplane to the selectedelement. The normalvector to the plane is inthe X direction.



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Exercise 7A (9/11)

9. Use Measure Between in Chain Mode.

Use the Measure between tool in Chain mode

to calculate multiple dimensions.

a. Select the Measure Between icon.

b. Select Measure Between in Chain

Mode.

c. Ensure the Keep Measure option isselected.

d. Select the plane created in the laststep as the first element.

e. Select the center of the hole as the

next element.

f. Select the center of the next hole asthe next element.

g. Select OK.

9d

9e9f

9g

9c

9b9a



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Exercise 7A (10/11)

10. Calculate Mass Properties.

Use the Measure Inertia tool to determine

the mass properties of the model.

a. For clarity, hide the existingmeasurements.

b. Select the Measure Inertia icon.

c. Select PartBody on the specificationtree. The results display.

d. Select the Customize icon.

e. Calculate only the volume, mass,and the center of gravity.

f. Select OK.

10b

10c

10e

10f



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Exercise 7A (11/11)

10. Calculate Mass Properties (continued).

Use the Measure Inertia tool to determine

the mass properties of the model.

g. Select Create Geometry.

h. Create an associative axis system.

The created axis system is located atthe center of gravity.

i. Select OK.

j. Select OK in the Measure Inertiawindow.

11. Save and close the model.

10i

10h

10j

10g



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Exercise 7A: Recap

Apply material properties

View material on the model

Take measurements

Calculate mass properties



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Exercise 7BCopyrightDASSAULTSYSTEMES

Exercise 7B

In this exercise, you will use the measurement tools to determine specificdimensions on an existing model. High-level instruction for this exercise isprovided.

By the end of the exercise you will be able to: Apply material to a model

Take measurements


15 min



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Exercise 7B (1/2)

1. Open Ex7B.CATPart.

2. Apply Iron material to the model.

3. View the applied material.

4. Determine the width of the part.

2

3

4

Width



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Exercise 7B (2/2)

5. Calculate the distance between thethree center points of the three holes.

6. Determine the mass of the model.

7. Measure the angle as shown.

8. Save and close the file.

6

5

7



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Exercise 7B: Recap

Apply material to a model

Take measurements




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Step 3 Create FormulasCopyrightDASSAULTSYSTEMES



2. Analyze the model.

3. Create formulas.

Step 3: Create formulas.In this section, you will learn how tocreate formulas to better control thedesign intent of your model.




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Formulas

All features and elements in CATIA areunique. As features are created, they receive aunique identifier (parameter). Dimensions andconstraints are also given a unique identifiers.Additional parameters are created for the

material, saved measurements, etc.

These parameters can be used to createformulas. Formulas are equations that typicallyrelate one parameter to another, and can beused to ensure design intent is maintained.

Formulas are stored under the Relationsbranch of the specification tree. User-definedparameters are stored under the Parametersbranch of the tree.



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Identifying Parameters

Internal identifiers are associated with eachparameter in CATIA. It can often be difficult todetermine what parameter is required basedon its internal identifier.

When a feature is selected from thespecification tree or directly on the model, allparameters associated with the feature appearin the Formula or Formula Editor window, aswell as display on the model.

Selecting a parameter from the window or themodel will highlight it on the other.



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Renaming Parameters

Parameters can be renamed using theFormula window. It is helpful to renamesystem-generated parameters to moremeaningful names, as this helps locateparameters and better understand formulas.

Use the following steps to rename aparameter:

1. Select the Formula icon.2. Locate the parameter in the parameters

window.3. Replace the name in the Edit Name or

Value of current parameter field with amore meaningful name.

4. Select Apply to confirm the change.5. Select OK to close the window.

1

2

3

45



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Filters

The Formulas and Formula Editor windowshave filters that can be used to find aspecific parameter quickly.

In the Formula window, you can filter by

Name or Type. In the Formula Editorwindow, you can help narrow the searchfor the correct parameter by using theDictionary, Members of Parameters, andMembers of All columns.

If you have renamed your parameters,consider using the Renamed Parameterfilter to quickly display only renamedparameters in the model.

Use Filters to locate

parameters that do notdisplay on the model(e.g., material, mass,etc).



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Creating Formulas

A common use for formulas is to relate onedimension to another. There are two methodsto drive a dimension by a formula:

A. Use the formula window.

B. Edit the dimensional value.

A

B



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Creating a Formula Using the Formula Window (1/2)

In the example shown, the length of the box isequal to two times the width of the box.

Use the following steps to create a formula todrive a dimension using the Formulas window:

1. Select the Formula icon2. Select the feature containing the

dimension. All dimensions associatedwith the selected feature appear on thescreen.

3. Select the dimension on the model (e.g.,Length). The dimension highlights in theParameter window. Notice the identifierfor the length dimension(PartBody\Sketch.1\Length.8\Length).

4. Select Add Formula.

4

2

3

Length

Width

1



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Creating a Formula Using the Formula Window (2/2)

Use the following steps to create a formula todrive a dimension using the Formulas window(continued):

5. Enter the formula. To relate the length

dimension to the width dimension, double-click the width dimension in the FormulaEditor window(PartBody\Sketch.1\Length.7\Length), orselect it on the model. Enter [* 2] toequate the length to be twice the width.

6. Select OK.7. Select OK in the Formulas window.

6

7

5



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Creating a Formula by Editing the Dimensional Value (1/2)

Use the following steps to use the DimensionalValue window to equate the length of the boxto two times the width of the box:

1. Edit the feature.

2. Double-click on the dimension to edit it(e.g., Length).

3. Right mouse click in the value field andclick Edit Formula in the contextualmenu.

1

2

Length

Width

Dimensions can be

edited from theSketcher or Part Designworkbench.



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Creating a Formula by Editing the Dimensional Value (2/2)

Use the following steps to use the DimensionalValue window to equate the length of the boxto two times the width of the box (continued):

4. Enter the formula. To relate the dimension

to another parameter, select theparameter using the window or from thescreen. In this example, the Length.8parameter (the length) is set to equaldouble the Length.7 parameter (width).

5. Select OK.

6. Select OK in the Constraint Definitionwindow.

4

5

6



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Creating User-Defined Parameters (1/2)

User-defined parameters can contain text information, such as designer, revision date, etc. Theycan also contain a variety of numerical values. Parameters can be equated to dimensions in yourmodel and be used to drive your design.

S d N



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Creating User-Defined Parameters (2/2)

Use the following steps to create a user-defined parameter.

1. Select the Formula icon.2. Select the type of parameter to create

from the Type pull-down menu (to createa parameter to drive dimensions, forexample, select the Length type).

3. Select New Parameter of Type.4. Enter a meaningful name.5. Enter a value.

6. Select Apply.7. Select OK.

1

23

4 5

7 6

To create parameters

that will drivedimenisons, choose theLength type. Real andInteger types areunitless and aretherefore better forconstants. The Lengthtype uses the units ofthe model.

Student Notes



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Recommendations for FormulasIn this section, you will be given some recommendations that may help whencreating measurements.

Student Notes:



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Step 3 Create Formulas

CopyrightDASSAULTSYSTEMES

Units (1/2)

It is important to consider units when you writeformulas.

If no units are specified in a formula, thedefault units is used (i.e., meters). This is

particularly important if you are adding orsubtracting a numerical value.

For example, consider a formula that equatesthe length of the pad (X) to the width of thepad (Y) + 2mm.

If the formula is entered as:

X = Y + 2

CATIA generates a warning message and

assume two meters. This would make thevalue of X too large.Y = 50mm

X = Y + 2m = 2050mm

Student Notes:


U i (2/2)


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Units (2/2)

Instead, the formula should beentered as the following:

X = Y + 2mm.

X=Y+2mm=52mm

Y = 50mm

Student Notes:


Di l i F l d U D fi d P t


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Stude t otes




Displaying Formulas and User-Defined Parameters

User-defined parameters can also be viewedin the specification tree. Click Tools > Options> Infrastructure > Part Infrastructure. Selectthe Parameters option from the Display tab.Select the Relations option to view formulas.

The value of parameters can be displayed byclicking Tools > Options > General >Parameters and Measure. Select the WithValue option from the Knowledge tab.

Student Notes:


To Sum Up


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To Sum Up...


To Sum Up

Using the knowledge learned in this lesson,you should be able to finalize the design intenton the table.

The table will require the following:

Material applied.

Material viewed on the model.

Dimensions verified

Mass calculated

Formulas created to maintain design intent

Student Notes:


E i 7C


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Exercise 7C


Exercise 7C

In this exercise, you will create formulas in an existing part. This exercise willhelp you understand how to locate and rename parameters, create newparameters, and create formulas to maintain design intent. You will createformulas to maintain design intent of the engine plate. Detailed instruction forthis exercise is provided.

By the end of this exercise you will be able to:

Rename parameters

Create new parameters

Create user-defined parameters

Create formulas

15 min

Student Notes:


Exercise 7C (1/12)


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Exercise 7C


Exercise 7C (1/12)

1. Open an existing part file. To begin, open an existing part file using the open tool.

a. Click File > Open.

b. Open Ex7C.CATPart.

2. Create a formula to control sketcher fillets. The four fillets were created inside sketch.1. Create

formulas inside the Sketcher workbench to control thesefillets together.

a. Double- click on Sketch.1 to edit it.

b. The fillets should all be 20mm. The fillet on the topright is already correct, so you will use this one to

drive the others.c. Double-click on the top left fillet dimension to edit it.

d. Right mouse click in the Value field and click EditFormula in the contextual menu.

1b

2b2c

2d

Student Notes:


Exercise 7C (2/12)


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Exercise 7CCopyrightDASSAULTSYSTEMES

Exercise 7C (2/12)

2. Create a formula to control sketcher fillets(continued).

e. Equate this fillet dimension to the 20mm fillet byselecting the 20mm dimension on the sketch.

f. The 20mm parameter updates in the Formula Editor.

g. Select OK.

h. Select OK.i. Create formulas for the other two fillets. Equate them

to the fillet on the top right as well.

j. Exit the Sketcher workbench.

2i 2g

2f

2e

Student Notes:


Exercise 7C (3/12)


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Exercise 7C (3/12)

3. Create a parameter.

Create a user-defined parameter that

is used to control the number ofinstances in the circular pattern.

a. Select the Formula icon.

b. Select Integer from the Typepull-down menu.

c. Select New Parameter of type.

d. Change the name to [No. ofHoles].

e. Set the value to [4].

f. Select OK.

3f

3e3d

3c 3b

3a

Student Notes:


Exercise 7C (4/12)


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Exercise 7C (4/12)

4. Add the parameter to thespecification tree.

The Parameters branch and viewoptions may already be set, verifythey are correct.

a. Click Tools > Options.

b. Select Infrastructure > PartInfrastructure.

c. Select the Display tab.

d. Display all information inthe specification tree.

4d

4c

4b

Student Notes:


Exercise 7C (5/12) 4f


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e c se C (5 )

4. Add the parameter to thespecification tree (continued).

e. Click General > Parametersand Measure.

f. Select the Knowledge tab.g. Select the With Value option.

h. Select OK.

i. Notice the Parameters branchin the tree. When it isexpanded, the parameter you

created is displayed along withits value.

4g

4i

4h

4f

4e

Student Notes:


Exercise 7C (6/12)


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e c se C (6/ )

5. Equate the pattern instance parameter tothe No. of Holes parameter.

Create a formula to equate the pattern instancewith the new user-defined parameter.


b. Select the pattern.c. Select

PartBody\CircPattern.1\AngularNumber.

d. Select Add Formula.

5d

5c

5a

Student Notes:


Exercise 7C (7/12)


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( )

5. Equate the pattern instance parameter tothe No. of Holes parameter (continued).

e. From the Members of Parameterscolumn, select Renamed Parameters.

f. Double-click on No. of Holes.

g. Select OK.h. The Pattern Instance parameter is now

equal to the No of Holes parameter.Select OK.

i. Test the formula by double-clicking onthe No of Holes parameter and changing

the value to [6].

5i

5g

5e5f

Student Notes:


Exercise 7C (8/12)


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( )

6. Rename parameters.

To help locate parameters faster, rename

them.


b. Select Pad.1 to only display its

parameters.c. Highlight

PartBody\Sketch.1\Offset.7\Offset.

d. Rename the parameter to [Length].

e. Select Apply.

6e

6d

6c

6a

Student Notes:


Exercise 7C (9/12)


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6. Rename parameters (continued).

f. HighlightPartBody\Sketch.1\Offset.5\Offset.

g. Rename the parameter to [Width].

h. Select Apply.

i. Select OK.

6h6i

6g

6f

Student Notes:


Exercise 7C (10/12)7d


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7. Create a formula.

Create a formula that equates the width and

the height of Pad.1.

a. Double-click Pad.1 to edit.

b. Double-click the Length dimension.

c. Right mouse click in the Value fieldand click Edit Formula.

d. Select the Width dimension.

e. Select OK

f. Select OK from the ConstraintDefinition window.

g. Select OK from the Pad Definitionwindow.

7d

7b

7c

7e

Student Notes:


Exercise 7C (11/12)


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Create a formula that equates the thickness

of the model to the 0.05 times the length.


b. Select the pad.

c. Highlight the parameter with value5mm.

d. Rename the parameter to[Thickness].

e. Select Apply.

f. Select Add Formula.

8f

8e

8d

8c

8a

Student Notes:


Exercise 7C (12/12)


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8. Create a formula (continued).

g. Select the Width dimension.

h. Add [* 0.05] to the formula.This means the thickness will

equal 0.05 of the part length.i. Select OK

j. Select OK from the Formulaswindow.

k. Edit the Width dimension to200mm. Does the thickness

and length update correctly?

9. Save and close the part.

8i

8g

8h

Student Notes:


Exercise 7C: Recap


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Rename parameters

Create new parameters


Create formulas

Student Notes:


Exercise 7D


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Exercise 7DCopyrightDASSAULTSYSTEMES

In this exercise, you will practice maintaining design intent by creating formulasand parameters. You will use the tools used in previous exercises to completethis exercise. High-level instruction for this exercise is provided.

By the end of this exercise you will be able to: Create formulas


20 min

Student Notes:


Exercise 7D (1/7)


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1. Open Ex7D.CATPart.

Open an existing part file using the Open tool.

2. Review the model.

Review the model creation. Are there any existing formulas?

Student Notes:


Exercise 7D (2/7)


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3. Control all Pad.1 dimensions with thewidth.

Create formulas so that changing the widthof pad.1 also updates the radius and thelength. The radius should be 8% of the width

and the length should be 75% of the width.

3

3

Width

Length

Student Notes:


Exercise 7D (3/7)


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Create a formula between the diameter of

the co-axial hole and the outside radius.Make the co-axial hole diameter 2/3 the

outside radius.

4

Outside radius

Student Notes:


Exercise 7D (4/7)Remember to redefine


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5. Measure arc length of the edge fillet.

In order to use a measurement in a formula,

you must create the measurement beforecreating the feature where you want to useit. As a workaround, define EdgeFillet.1 as

the object and take the measurement. Bydoing this, the measurement comes beforeEdgeFillet.2 in the regeneration cycle:

a. Right mouse click on EdgeFillet.1

and click Define in Work Object inthe contextual menu.

b. Calculate the arc length ofEdgeFillet.1. You will need tocustomize the measurement tocalculate length.

c. Save the measurement to thespecification tree.

The next two steps are used to create a formula thatcontrols the radius of EdgeFillet.2, based on the arc lengthof EdgeFillet.1.

EdgeFillet.2 as the workobject after you createthe measurement.

Student Notes:


Exercise 7D (5/7)


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Create a formula that equates the radius of

EdgeFillet.2 to 1/3 the arc length measuredin the last step.

6

Student Notes:


Exercise 7D (6/7) 7


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7. Create a user-defined parameter.

Type = [Length]

Name = [Width]

Value = [200mm]

8. Equate the width of the part to thenew Width parameter.

Set the Width dimension(PartBody\Sketch.1\Offset.28\Offset) ofPad.1 equal to the new parameter.

8

Student Notes:


Exercise 7D (7/7)


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9. Test the model.

Change the Width parameter to

[150mm] and change the radiusof EdgeFillet.1 to [5mm].

Update the model. Did themodel update as expected?

10. Save and close the file.

Student Notes:


Exercise 7D: Recap


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Create formulas


Student Notes:


Exercise 7E


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Exercise 7ECopyrightDASSAULTSYSTEMES

In this exercise, you will create formulas and parameters to control dimensionsin the model. You will use the tools you have learned in this lesson to completethe exercise with no detailed instruction.

By the end of the exercise you will be able to: Rename parameters

Create formulas


15 min

Student Notes:


Exercise 7E (1/3)Parameters andformulas for Pocket.1


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1. Open Ex_7E.CATPart.

2. Rename the following parameters to help create the formulas:

Fillet RadiusPartBody\EdgeFillet.2\CstEdgeRibbon.16\Radiusf.

Hole DiameterPartBody\Hole.2\Diametere.

LargeArc RadiusPartBody\Sketch.1\Radius.14\Radiusd.

SmallArc RadiusPartBody\Sketch.1\Radius.13\Radiusc.Pad.1 LengthPartBody\Sketch.1\Offset.41\Offsetb.

ThicknessPartBody\Pad.1\FirstLimit\Lengtha.

New NameCurrent Name

2b

2c

2f

2a

2d

2e

have already beencreated.

Formula 1: The Depthof the pocket is thetotal depth of the model.

Formula 2: The lengthof the pocket is 55% thetotal length of the

model.

Student Notes:


Exercise 7E (2/3)

3 C


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3. Create a parameter.

Type = [Length].

Name = [Length].

Value = 180mm].

4. Create the following formulas:a. LargeArc Radius = 10% of Length.

b. SmallArc Radius = 2/3 LargeArc Radius.

c. Thickness = 2.5% Length.

d. Hole Diameter = LargeArc Radius.

e. Fillet Radius = Thickness.

f. Pad.1 Length = Length.

Student Notes:


Exercise 7E (3/3)

5 T t th d l

The distance betweenthe arc centers whenth l th l


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5. Test the model.

a. Change the length parameter to a valueof [300mm].

b. Use the Measurement tool to calculatethe new distance between the center ofthe large arc and the center of the small

arc.

5b

5a

the length equals300mm is 250mm.

Student Notes:


Exercise 7E: Recap


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Rename parameters

Create formulas


Student Notes:




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You will practice what you learned by completing the case study model usingonly a detailed drawing as guidance.

In this exercise, you will create the case study model. Recall the design intent ofthis model:

The model must be made of aluminum.

Create a hole that is centered on the part horizontally and 2mm above the top of the bottom

oblong holes.

When modifications are made to the model:

Overall width must be 80% of the length (L).

Thickness of the model is always 1% the length (L) of the model.

The thickness of the ribs is 2 times the thickness of the model.

Using the techniques you have learned in this and previous lessons, create themodel without detailed instruction.

30 min

Student Notes:


Do It Yourself: Finalizing Design Intent (1/5)

Use the following steps as hints to guide you

Recall Exercise 7E -step 5. To use themeasurement in a


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Use the following steps as hints to guide youthrough creating the model:

1. Open CS_L7.CATPart.

2. Create a 20mm diameter hole with the

following requirements: Hole must remain 2mm above the top

of the bottom oblong holes.

To do this, you can create ameasurement to calculate the distance

from the bottom of the model to the

top of the bottom oblong holes. Themeasurement a point has alreadybeen created.

Hole must remain centeredhorizontally on the model.

This model has been createdsymmetric about the YZ plane.

Formula1

measurement in aformula for the hole, themeasurement must becreated before the hole

Design Intent:

Hole must becentered horizontally

and placed vertically2mm above the top ofthe bottom oblongholes

Student Notes:



3 Rename parameters and create formulas

The Length parameterhas already been

renamed for you.


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3. Rename parameters and create formulasto maintain the required design intent. Thecompleted model is shown.

Length

Formula2

y

Design Intent:

Thickness of themodel is always 1%the length (L) of themodel.

The thickness of theribs is 2 times thethickness of themodel.

Student Notes:



4 Rename parameters and create formulas

The Length parameterhas already been

renamed for you.


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4. Rename parameters and create formulasto maintain the required design intent. Thecompleted model is shown.

Length

Formula3Formula4

y

Design Intent:

Thickness of themodel is always 1%the length (L) of themodel.

The thickness of theribs is 2 times thethickness of themodel.

Student Notes:



5. Calculate the volume and mass of the

The distance calculatedshould equal 100mm.


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5. Calculate the volume and mass of themodel. Create an associative point at thecenter of gravity.

Design Intent:

The model must bemade of aluminum.

Student Notes:



6. Modify the length of the model to [500mm].


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y g [ ]

Calculate the distance between the centeroblong hole and the side wall.

Student Notes:


Case Study: Finalizing Design Intent Recap


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Apply material to model


Create formulas

Take measurements

Date post:	14-Apr-2018
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