lab exercise 3 of catia

8/9/2019 Lab Exercise 3 of Catia

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Lab Exercise 3: Using References to Design theAir Filter Cover (Challenge)

Objectives

After successfully completing this exercise, you will know how to:

Copy references from the parts that the Air Filter Cover isenveloping.

Create the curve network required to build the surface model.Scenario

Cordless Power Tools, Inc. (CPT) is designing a new Power Drill. The

engineering team has created all the mechanical parts such as theEngine, Carburetor and Chuck and have created the assembly. You areasked to design the enveloping covers. Before starting to design the

cover, you need to establish the references that will be used to design

it. These references include the mounting data and the edge

references of another part (the carburetor plate) on which the cover

sits.

You are continuing with the task of designing cordless drill covers for

which the Engineering team has created the mechanical parts like

Engine, Carburetor and Chuck. You have begun to design the Air Filtercover by copying the references that include the mounting point and

the edge references of the carburetor plate on which the cover sits.

Figure 61: The Drill Model Without the Air Filter COVER

Task 1. Review the drill assembly and the references you need todesign the Air Filter Cover.

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1. In the Folder Browser , browse to the module_03\ drillfolder.

2. Click on the drill folder to view the contents of the folder in thebrowser.

3. Right-click on the drill folder and select Set WorkingDirectory.

4. Select the DRILL_CARBURETOR.ASM from the browser topreview the model, and then click Open in Pro/ E .

5. If necessary, click Datum Planes , Datum Axes , DatumPoints , and Coordinate Systems from the main toolbar

to disable their display.

Figure 62: Drill Assembly With Necessary Parts

6. Select the CARBURETOR.ASM in the model tree, right-click andselect Open.

7. Click Datum Planes and Datum Axes from the maintoolbar to enable their display. Notice the curve chain on the

carburetor plate. Also notice the axis, which defines the bolt

mounting location.



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Figure 63: Carburetor Assembly

Task 2. Assemble the AIR_FILTER_COVER.

1. Click Add Component from the feature toolbar. Select theAIR_FILTER_COVER.PRT and click Open. Notice the

AIR_FILTER_COVER.PRT has no geometry.

Press CTRL + ALT and right-drag to position the component asshown in the following figure on the left.

2. Create the following three constraints. If necessary, press ENTERto accept the default offset for each constraint, and then changethe offset type from a value to Coincident.

Select the FRONT plane from the component and ASM_FRONTfrom the model tree.

Select the TOP plane from the component and ASM_TOP fromthe model tree.

Select the RIGHT plane from the component and CARB_PLATEfrom the assembly.

Click OK from the Component Placement dialog box.



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Figure 64: Assembling the AIR_FILTER_COVER

Task 3. Copy the references you need to create the surface model ofthe air filter cover.

1. With the AIR_FILTER_COVER.PRT still selected, right-click andselect Activate.

2. Click Datum Planes from the main toolbar to disable theirdisplay.



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3. Click Insert > Shared Date > Copy Geometry from the mainmenu.

Double-click Curve Refs and then click Curve Chain. Select the curve segment shown in the following figure on the

left.

Click Select All > Done. (Do NOT click OK yet)

Figure 65: Selecting All Curve Segments

Double-click Misc Refs, and click Axis. Select datum axis AF_COVER as shown in the following figure. Click OK > OK > OK to complete the feature.



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Figure 66: Copying Curve Chain

Task 4. Review the copied geometry.

1. Select the AIR_FILTER_COVER.PRT in the model tree, right-clickand select Open.

2. Click Datum Planes from the main toolbar to enable theirdisplay.

Figure 67: Copied Reference Geometry

3. Click Datum Axes from the main toolbar to disable theirdisplay.

Task 5. Create datum points to be used to construct surfaces.

1. Click Datum Points from the main toolbar to enable theirdisplay.

2. Start the Datum Point Tool from the feature toolbar. Select a location for PNT0 as shown, then right-click and select

New P oint.



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Select a location on the upper curve segment for PNT1 as shown,then press CTRL and select datum plane FRONT. Right-click and

select New P oint.

Select a location for PNT2 as shown.

Figure 68: Creating Datum Points

3. Click New P oint. Select a location for PNT3 as shown, then right-click and select

New P oint.



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Select a location on the upper curve segment for PNT4 as shown,then press CTRL and select datum plane FRONT. Right-click and

select New P oint.

Select a location for PNT5 as shown. Click OK from the Datum Point dialog box.


Task 6. Create a curve using datum point references.

1. Start the Sketch Tool from the feature toolbar. Select datumplane FRONT and click Sketch. Click Datum Planes from the

main toolbar to disable their display.

Select points PNT1 and PNT4 as references and click Close.



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Right-click and select Line. Starting at PNT1, sketch a line. Right-click and select Tangent End. Sketch 3 arcs as shown. Right-click and select Line. Sketch the lower line ending at

PNT4.

Right-click and select Dimension . Create and edit dimensions asshown.

Points PNT1 and PNT4 are in the sketching plane, although points

PNT2 and PNT5 are closer and display in the sketch.

Figure 70: Creating a Sketch

2. Click Complete Sketch from the feature toolbar.3. Press CTRL + D to orient to the standard orientation.

Task 7. Continue to build datum points.



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1. Start the Datum Point Tool from the feature toolbar. Select a location for PNT6 as shown, then right-click and select

New P oint.

Select a location for PNT7 as shown, then right-click and selectNew P oint.

Click OK from the Datum Point dialog box.



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Task 8. Define the top flat surface of the part.1. Click Edit > Fill from the main menu.2. With the dashboard open, start the Datum Plane Tool . Press CTRL and select the two curve segments shown in the

following figure.

Select the Display tab and click Adjust Outline. Drag thehandles as shown.

If necessary, click the yellow arrow to flip the positive directionupwards.




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Figure 72: Creating a Datum Plane


4. With the datum plane still selected, start the Sketch Toolfrom the feature toolbar.

Select datum plane FRONT as the reference, and orient it to faceLeft.

Click Sketch. Select points PNT0, PNT6, and PNT2 as referencesand click Close.

Click Datum Planes from the main toolbar to disable theirdisplay.

Right-click and select Rectangle. Sketch a rectangle connectingthe three points.

Click Circular Fillet from the sketcher toolbar. Create filletsas shown.

Click Constraints and click Equal .Select each fillet. Edit the fillet radius as shown.



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Press CTRL and select the two curve segments shown in thefollowing figure.

Select the Display tab and click Adjust Outline. Drag thehandles as shown.

If necessary, click the yellow arrow to flip the positive directionupwards.


Figure 75: Creating a Datum Plane


4. With the datum plane still selected, start the Sketch Toolfrom the feature toolbar.

Select datum plane FRONT as the reference, and orient it to faceLeft.

Click Sketch. Select points PNT3, PNT7, and PNT5 as referencesand click Close.

Click Datum Planes from the main toolbar to disable theirdisplay.

Sketch a rectangle with fillets as shown.



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Figure 76: Creating a Sketch

5. Click Complete Sketch .6. Click Resume Feature from the dashboard and then click

Complete Feature .

7. Press CTRL + D to orient to the standard orientation.

Figure 77: Fill Surface Complete

Task 10. Import a set of points.



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1. Instructor: Explain to the students they are importing thepoints to create datum curves through the points. Later on in the

course they will use the Boundary Blend tool to create a surfaceusing the curves as boundaries. Click Insert > Shared Data >

From File.

Select cover_points.igs then click Open. Click Close from the Information Window. Locate the small dialog box and click OK . Reorient the model and notice this has created three arches of

points.



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Figure 78: Imported Points

Task 11. Create curves passing though the first set of imported

points.

The next three tasks will each use a different method to connectthe points. This method uses the Curve Through Point option, which

allows tangencies and curvature continuities to be quickly set for the

curves.

1. Click Datum Curve from the feature toolbar. Click Thru Points > Done from the menu manager. Select the seven points (from left to right) shown in the following

figure.

Notice the curve creates an undesirable dip near the center.Click Quit.



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Figure 79:

2. Double-click Curve Points from the dialog box. Select the two points (from left to right) shown in the following

figure.

Click Done > OK.

Figure 80: Creating a Curve Through Points

3. Click Datum Curve from the feature toolbar. Click Thru Points > Done from the menu manager. Select the three points shown in the following figure on the left

and click Done > OK.

Repeat the procedure to create a curve through the two pointsshown on the right.



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Figure 82: Completed Curve

5. Click Datum Curve from the feature toolbar. Click Thru Points > Done from the menu manager.

Select the points shown in the following figure (from left to right)and click Done.

Double-click Tangency from the dialog box. Click Start > Crv/ Edge/Axis > Tangent and select the

adjacent curve to the left.

Ensure the arrows point to the right and click Okay. Click End > Crv/ Edge/ Axis > Tangent and select the adjacent

curve to the right.

Ensure the arrows point to the right and click Okay.

Click Done/ Return > OK.

Figure 83: Completed Curve

6. Select the curve shown in the following figure on the left. Select the curve again so the curve segment highlights in bold

red.



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Press SHIFT and select the segment again to activate one byone chain selection.

Select the additional segments as shown.

Figure 84: Selecting One by One Chain

7. Click Copy from the main toolbar, and then click Paste . Notice the curve type is set to Exact, and click Complete

Feature .

8. Press CTRL and select the previous five Curve features in themodel tree.

Right-click and select Hide.Task 12. Create a sketch passing though the second set of imported

points.

This task connects points with a sketch as an alternate method.This method allows flexibility by being able to sketch and dimension as

desired.

1. Press CTRL + D to orient to the default orientation.



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2. Start the Sketch Tool from the feature toolbar. Select datumplane TOP from the model tree. Select datum plane RIGHT as

the reference, and orient it to face Bottom. Click Sketch. Press

CTRL + D to orient to the default orientation.

Select the seven points making up the second set of points andclick Close.

Click Datum Points from the main toolbar to disable theirdisplay.

Click Sketch Orientation from the main toolbar. Click No Hidden from the main toolbar. Click Spline and sketch a spline through the three lower

points, as shown.

Right-click and select Line. Sketch two vertical lines. Right-click and select 3-Point. Sketch two arcs tangent at each

end.

Figure 85: The Curve Network to Create Boundary Surfaces

3. Click Complete Sketch . Press CTRL + D to orient to the default orientation. Click Datum Points from the main toolbar to enable their

display.

Click Shading from the main toolbar.



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Figure 86: Curve Created

Task 13. Create a curve passing through the third set of importedpoints.

This task connects points with a sketch as an alternate method.

This method allows flexibility by entering radii values with the Curve

Through Points option.

1. Click Datum Curve from the feature toolbar. Click Thru Points > Done from the menu manager. Click Multiple Rad. Select the first three points (left to right) and enter a radius of

15.

Select the next point and click 15 as the value. Select the next point, click New Value and enter 60. Select the next point and click 15 as the value.



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Select the last point and click 15 as the value. Click Done > OK.

When entering radii values, the system creates the radius afterthe points are connected with straight lines. This results in the curve

not passing through all points.

Figure 87: Curve Completed

2. With the curve still selected, right-click and select Edit. Noticethe radii values.

3. Click Save from the main toolbar and click OK.4. Click File > Erase > Current > Yes.

This completes the exercise.

lab exercise 3 of catia

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