Part Design Advanced

8/3/2019 Part Design Advanced

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CATIA Training

Part Design AdvancedPart Design Advanced

Detailed StepsDetailed Steps

COPYRIGHT DASSAULT SYSTEMES 2002 Version 5 Release 8January 2002EDU-CAT-E-PDG-AS-V5R8


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Part Design Advanced Detailed Steps

Table of ContentsPiston ...........................................................................................................................................................4

Creating the Main Pad ..............................................................................................................................4

Creating the Symmetrical Cut-out..................................................................................................... .......6

Creating the Cylindrical Boss .................................................................................................................12

Creating Pockets ....................................................................................................................................13

Creating a Through Hole ........................................................................................................................17

Creating Fillets .............................................................................................................................. .........19

Changing the color .................................................................................................................................25

Angle Bracket............................................................................................................................................28

Setting Part Design Parameters .............................................................................................................28

Defining the Pads for the Bracket...........................................................................................................28

Defining the Pilot Holes and the Angular Pads for the Bracket..............................................................32Defining the Clevis Through Hole and Fillets .........................................................................................36

Building the Hinge ......................................................................................................................................39

Car Jack Support.......................................................................................................................................51

Creating Profiles and Pads .....................................................................................................................52

Creating Draft Angles .............................................................................................................................56

Creating Edge Fillets ..............................................................................................................................59

Creating Additional Profiles and Pads ....................................................................................................61

Creating Edge Fillets for the Additional Pads .........................................................................................64

Creating Holes ..................................................................................................................................... ..66

Creating Grooves ...................................................................................................................................89

Creating a Chamfer................................................................................................................................92

Creating Pockets....................................................................................................................................94

Creating Edge Fillets..............................................................................................................................98

Side Toolhead ..........................................................................................................................................101

Creating Profiles, Pads and Draft Angles .............................................................................................102

Creating Pockets and Draft Angles ......................................................................................................105

Creating Profiles, Pads and Draft Angles .............................................................................................111

Creating Holes ................................................................................................................................... ..114

Creating Pockets ..................................................................................................................................127

Creating Fillets .....................................................................................................................................131

Creating Chamfers ...............................................................................................................................136

Tee Fitting ................................................................................................................................................139

Creating Pads .................................................................................................................................... ..140

COPYRIGHT DASSAULT SYSTEMES 2002 2


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Draft Angles and Fillets .................................................................................................................... ....150

Holes Creation .....................................................................................................................................154

Mirroring ...............................................................................................................................................162

Mold Core: Shaft Creation ....................................................................................................................166

Mold Core: Filleting ....................................................................................................................... .......170Mold Core: Shaft Creation ....................................................................................................................171

Mold Core: Filleting ....................................................................................................................... .......174

Removing Body ....................................................................................................................................175

Meat Mincer Screw ..................................................................................................................................179

Creating Profiles and Helixes ...............................................................................................................180

Creating a Loft......................................................................................................................................195

Creating Tri-Tangent Fillets ..................................................................................................................198

Creating Variable Radius Fillets ...........................................................................................................200

Creating a Pad ................................................................................................................................ .....204

Creating a Groove ................................................................................................................................208

Creating a Pad ................................................................................................................................ .....219

Creating a Hole ............................................................................................................................. .......222

Creating a Chamfer ..............................................................................................................................225

Pedal Support..........................................................................................................................................228

Rib Creation .................................................................................................................................... .....230

Circular Pattern ....................................................................................................................................233

Tri-Tangent Fillets .............................................................................................................................. ..234

Filleting .................................................................................................................................................236

Rib Creation .................................................................................................................................... .....240

Filleting .................................................................................................................................................243

Pad Creation ........................................................................................................................................247

Filleting .................................................................................................................................................251

Hole Creation .......................................................................................................................................257

Circular Pattern ....................................................................................................................................262

Threaded Hole Creation .......................................................................................................................263

Assembling the Crank Set....................................................................................................................266



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Piston

We will design this Piston to practice the various ways of using both the Sketcherand Part Designworkbenches for designing parts.

Load the starting piston part from the companion, and if necessary, activate Start + Mechanical Design+ Part Design (DO NOT DO IT IF YOU ARE ALREADY IN THE PART DESIGN WORKBENCH)

Creating the Main PadIn this section, we are going to build the main pad



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Now, let us do it !

1. Select the Pad icon .

2. Select the sketch to be extruded.

3. Enter the following parameters in the dialog box, and then select OK.



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You get:

Creating the Symmetrical Cut-outIn this section we are going to build the symmetrical cut-out.

We are going to insert a body in which we are going to create a pad and its symmetric.

4. Select Insert + Body



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5. Select the Sketcher icon .

6. Select the ZX plane.

7. Select the Profile icon .

8. Sketch approximately the following profile.



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9. Using the constraint icon, constrain the profile as shown here after.

10. Select the Exit icon to leave the Sketcher .

11. Using the Pad icon, create a pad with the following parameters.



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You get:

12. In order to get the symmetrical pad, select the Mirror icon .

13. Select the YZ plane.



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14. Select OK in the dialog box.

You get:

15. Now, we are going to Remove Body 1 from the main body. Place the cursor on Body 1 then selectRemove from the contextual menu.



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You get:

Creating the Cylindrical Boss

In this section, we are going to create the following bosses.

1. On the YZ plane, sketch and constrain the following circle

2. Once you have left the sketcher, create a pad (with the previously created circle) with the followingparameters.



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You get:

Creating PocketsIn this section, we are going to create the following pockets.



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1. On the YZ plane create and constrain the following arc.

2. Once you have left the sketcher, create a pocket (With the previously created arc) with the followingparameters.



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You get:

3. On the XY plane create and constrain the following profile.



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4. Once you have left the sketcher, create a pocket (With the previously created profile) with thefollowing parameters.

You get:



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Creating a Through Hole

In this section, we are going to create the following hole.

1. Select the Hole icon .

2. Select the following face.



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3. Create a hole with the following parameters.

You get:



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Creating Fillets

In this section, we are going to create the following fillets.

1. We are going to create first the following fillet. So select the Edge Fillet icon .



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2. Select the four following edges.

3. Enter 3 in the Radius field of the dialog box, then select OK.

You get:



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4. Using the same method, create an edge fillet with a radius of 5 at the following location.

You get:



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You get:



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You get:



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You get:



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Changing the color

In this section, we are going to change the piston color.

1. Place the cursor onto PartBody, then select properties from the contextual menu (MB3).



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2. Select a color in the Fill combo, then select OK.



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You get:



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Angle Bracket

We will design this small bracket to practice the various ways of using both the Sketcherand PartDesign workbenches for designing parts. One of the tools we will use in many different cases is theSketching of a Profile and extruding Pads.

Setting Part Design Parameters

1. Create a new Part and select mm as model unit by going to Tools + Options + General + Units.

2. Set the Sketcher Primary Spacing to 20 mm. and graduation to 10 by going to Tool + Options + Part +Sketcher.

3. Go to Tools + Options + Part + Display and make sure Relations is checked.

4. Click OK and exit Option.

Defining the Pads for the BracketThe views shown below are provided as an overall reference for dimensions and hole locations.



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1. We will first define all the sketches / pads for the Bracket. We will start with the 3 mm. thin flange.

2. Select the XY plane and enter the Sketcher. Draw the first sketch using Rectangle icon anddimension as follows:



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3. Exit Sketcher and create a Pad with height of 26 mm above sketch.

We will now create the base pad of the part:



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4. Reselect the XY plane and go back into Sketcher. Use Profile to sketch then constrain

the new contour to the boundaries of the existing Pad and apply the appropriate dimensions .

5. Extrude this second Pad to a height of 4 mm.



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Defining the Pilot Holes and the Angular Pads for the Bracket

Next we would like to create the two angle flanges (clevis).

To create this geometry, we will require an angularPlane at 24 Degrees with respect to the YZ plane inorder to sketch our profile. Since our drawing calls out the position of these flanges from the position ofthe pilot hole located between the flanges, we will make our plane pass through the center of this hole sothat we will readily have available the values of the extrusion limits.

Since our 24 Degrees Plane will pass through the center of one of the pilot holes, we will need to locatethis hole in the model. Consequently, we might as well create all the pilot holes first.

1. Position the first hole by first selecting the reference edges, the Hole feature icon, and finally thetop of the pad into which the holes are drilled. Put in the appropriate locating dimensions and the holediameter per the part drawing at the beginning of this exercise. Use the Up to Next option.



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2. Position the second hole by first selecting the reference edges, the Hole feature icon, and finallythe top of the pad into which the holes are drilled. Put in the appropriate locating dimensions and thehole diameter per the part drawing at the beginning of this exercise. Use the Up to Next option.

3. Create the third hole by first selecting the rounded edge the Hole feature icon , and finally the topof the pad into which the holes are drilled. Put the appropriate hole diameter (3), the hole isautomatically centered on the rounded edge. Use the Up to Next option.

We will now create the 24 Degrees plane through the center of one of the pilot holes. To do it, display thePlane icon by selecting the View + Toolbars + Reference Elements (Extended)



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4. Select the Plane icon and create the required plane using the Plane Type of Angle/Normalto Plane. Select the vertical pad wall as reference and the pilot hole as the rotation axis for theplane. Put in24 Degrees to get the desired orientation.



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5. To redefine the PartBody as the In Work Object place the cursor on the PartBody in the tree thenselect the Define In Work Object command from the contextual menu.

6. Select the plane you just created and go into the Sketcher to create the following profile. As before,

constrain the profile to the existing geometry and apply the appropriate dimensions.

7. Create a pad from this sketch with a thickness of 4 mm. (use the 2 limits option).



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We will now create the other Clevis by using the Rectangular Pattern tool (you can find this tool underInsert/Transformation Features)

8. Click on the Rectangular Pattern Icon , select the existing Clevis, select the red edge below forthe reference direction, and put in 2 instances spaced at 16 mm.

Defining the Clevis Through Hole and Fillets

1. In order to define a concentric hole, select the outside R 13 edge of the left Clevis, the Hole tool ,then the outside face of this Clevis. Put in 6 mm for the diameter and use the Up to Last option.



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Use Edge Fillet to create all the fillets. (You can multi-select edges by keeping the CTRL keypressed during selection.)

2. Create the R3 fillets (5 edges).

3. Create the R6 fillets (2 edges).

4. Finally, create the R8 fillets (2 fillets).



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Building the Hinge

In this exercise, you will build the hinge part using the following tools: sketcher, constraints, pad, pocket,hole, draft, fillet, mirror and pattern.

First we describe and discuss the methodology used to build the hinge; you dont have to read it - you cango ahead and build the hinge your way with the information given on this page.

1. Start a new CATPart.



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2. Lets start with a basic triangular pad, it will be the main pad. Enter the sketcher on the XY plane

.

3. Draw a rough sketch of the outer profile with Profile tool.

Hint: draw the left edge of the triangle vertically in order to get the vertical constraint automatically.

4. Constrain the sides as show below:



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5. Exit sketcher and use the triangle sketch to make the main pad in the positive OZdirection with a height of 7.5mm

6. Now, lets draw the pocket. Enter the sketcher on the bottom plane of the main pad .

Note that we draw the pocket profile on the bottom surface of the pad because later we want to be surethat the pocket bottom face position is linked to the Hinge thickness if the thickness changes, the pocketwill follow automatically.

7. Draw a rough profile for the pocket:

8. Constrain the profile to obtain the following triangle (Hint: use distance option in contextualmenu)



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9. Exit sketcher and with the triangle, make a pocket in the positive OZ direction and withthe following parameters:

10. Lets start now a first bearing. Enter the sketcher on the bottom face of the main pad .

11. Draw a 15 mm radius circle and constrain it to coincide (contextual menu) with the topvertex of the pocket.



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12. Exit the sketcher and use the circle to make a cylinder pad in the positive OZ directionand using the up to plane limit type with the top face of the hinge:



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13. Now lets duplicate this first cylinder pad for the other bearings. We will duplicate it with a user pattern and not a simple copy & paste - to ensure that later if a modification is needed on the bearings, wewill be able to do it only on one of them the others will follow automatically.

Enter again the sketcher on the bottom surface of the main pad .

14. Draw 2 points anywhere on the grid. Sketch.4 is added in the tree.

15. Make each of these points coincide (contextual menu) with each of the remaining vertices of

the pocket triangle (you may need to move the orientation of the part to see the small triangle).



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16. Exit sketcher and select the cylinder pad. To apply the pattern, click on User Pattern andSketch.4. Turn Keep specifications option on:

We will now stop working on the bearings to match the fabrication process: the holes are drilled at theend.

17. Now lets fillet , the six sharp corner edges with a common radius of 5mm:



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18. Lets build a draft angle around the hinge. The pulling direction is the positive OZ direction, theangle is 3 degrees and the Neutral element is the bottom face of the hinge.

19. Fillet the following edges with a common radius of 2mm. (You may need to do it in severalshots.)



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20. Now lets make the symmetrical part of the hinge using the bottom face as symmetry plane:

21. Now lets come back to the bearings, and make a hole in one of them: Select the Hole icon. Select the following edge in order to center the hole :



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Select the following face in order to place the hole:

Enter the following parameters:

You get:



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22. We will use the same pattern to duplicate this hole :For the positions, use the same sketch that you used for the cylinder pads (You can select Sketch.4from the tree). Turn Keep specifications option on.

23. You should get the following result. Save it.



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Car Jack Support

We will design this Car Jack Support to practice the various ways of using both the Sketcherand PartDesign workbenches for designing parts.

Once CATIA is running, activate the Part Design Workbench by clicking on the New icon and select

Part in the New dialog box. Click to validate.



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Using the Tools -> Options command, be sure that you are working in millimeters.

Using the Tools -> Options command, be sure that the sketcher grid has the following parameters:

Creating Profiles and Pads

In this section, we are going to build two necessary profiles that will allow you to create the main pad.



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1. Activate the Sketchericon , then select the XY plane.

2. Activate the Circle icon , then, using the grid, draw the following circle and cronstrain it (R=60).

3. Leave the Sketcherby selecting the Exit icon .

4. Now, activate the Pad icon .Using the previously created sketch, build a pad with the following parameters (do not forget to select

to validate the pad creation):



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5. Now we return in the sketcher by selecting the Sketchericon and the XY plane.

6. Create the second profile with two rectangles and two circles.

7. Add four corners to get the following profile.



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9. Now, activate the Pad icon .10. Using the previously created sketch, build a pad with the following parameters (do not forget to select




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You get:

Creating Draft Angles

In this session, we are going to draft angles.

1. Click on the DraftAngle icon , the Draft Definition dialog box appears.



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2. Select the faces to be drafted and the neutral element.

You get:



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3. Use the same methode to create the second draft. Use the following parameters.

You get:



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Creating Edge Fillets

In this session, we are going to build edge fillets.

1. Click on the Edge Fillet icon , the Edge Fillet Definition dialog box appears.

2. Select the edges to be filleted enter 30 as the radius, then select .



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You get:

3. Using the same methode, create the following fillets.

You get:



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Creating Additional Profiles and Pads

In this session, we are going to build two other elements. We need to return in the sketcher to draw aprofile.

1. Activate the Sketchericon , select the XY plane then draw a circle as shown below.



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3. Now, activate the Pad icon .

4. Using the previously created sketch, build a pad with the following parameters (do not forget to select


You get:



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5. We are going to create another profile with the following caracteristics. Activate the sketcher on theYZ plane, and create and constrain the following profile.



8. Using the previously created sketch, build a pad with the following parameters (do not forget to select




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You get:

Creating Edge Fillets for the Additional Pads

In this session, we are going to create the following fillets.



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1. Click on the Edge Fillet icon , the Edge Fillet Definition dialog box appears.

2. Click on the edges to be filleted, enter 3 as the radius then select .



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You get:

Creating HolesIn this session, we are going to build the following holes.



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1. Select the following surface:

2. Click on the Hole icon and enter the following parameters in the Hole Definition dialog box.



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3. We are going to move the hole center at the Origin point.

4. In the Hole Definition dialog box, click on the Positioning Sketch icon to constrain the hole. Selectthe following point and edge.



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5. Click on the Constraints Defined in Dialog Box icon



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6. Click on Concentricity and validate with

You get:

7. Now we are going to create a counterbored hole.




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9. Click on the hole icon and enter the following parameters, then select :



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You get:

We are going to create another counterbored hole.

10. First, select the following face:



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11. Click on the Hole icon and enter the following parameters:



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12. Use the Positioning Sketch to constrain the center of the hole at the following coordinates as shownbelow.


You get:



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Now we can create all the other V-bottom holes. So select the following face

14. Click on the Hole icon and create a V-bottom hole with the following parameters and select

.



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15. Now click on the following face.

16. Click on the Hole icon and create an other V-bottom hole with the following parameters and select



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You get:

Now we are going to create two other V-bottom holes.



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17. Select the following face:

18. Click on the Hole icon and create a hole with the following parameters:



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19. Use the Positioning Sketch icon to constrain the center of the hole


21. Create the second hole perpendicular to the first one with the following parameters:



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You get:

22. Create another V-bottom hole.



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You get:

Now we are going to create the following holes.



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24. Click on the Hole icon and enter the following parameters in the dialog box.



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25. Click on Normal to surface and select the following edge (parallel to the XY plane).

26. Click on Positioning Sketch to move the hole and enter the parameters:



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The second hole is on the same face. It has a length of 82mm and it is parallel to the hole created before.

You get:



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Now we are going to create another hole.

28. Select the following face

29. Create a hole and move it to the following coordinates



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You get:



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Now we are going to create the last hole of the support.

30. Select the following face:

31. Create the hole with the following parameters:



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You get:



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Creating Grooves

In this session, we are going to build grooves. They are built with a closed profile and a rotation axis.



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Now we are going to create another groove.

4. Activate the Sketchericon , select the XZ plane and draw the profile with the followingcaracteristics.


6. Now activate the Groove icon .



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You get:

Creating a Chamfer.

In this session, we are going to create a chamfer.



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7. Select the edge to be chamfered:

8. Click on the Chamfericon and enter the following parameters into the Chamfer Definition

dialog box and select .



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You get:

Creating Pockets.

In this session, we are going to build two pockets.



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1. Activate the Sketchericon , select the top face and draw the profile as follows.




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3. Click on the Pocket icon and write the following parameters into the Pocket Definition dialogbox.

You get:

We are going to create another pocket.

4. Activate the Sketchericon , select the bottom face and draw the profile with the followingcaracteristics.



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6. Click on the Pocket icon and enter the following parameters into the Pocket Definition dialog

boxthen select .



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You get:

Creating Edge Fillets.

In this session, we are going to create a f illet using the Keep Edge option.



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1. Select the edge you want to be filleted.

2. Click on the Fillet icon and enter 3 as the radius, then select and select the purple

edge as the edge to be kept. Select .



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You get:

You can save the Part.

COPYRIGHT DASSAULT SYSTEMES 2002100


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Side Toolhead

We will design this Side Toolhead to practice the various ways of using both the Sketcherand PartDesign workbenches for designing parts.

Once CATIA is running, activate the Part Design Workbench by clicking on the New icon and select

Part in the New dialog box. Click to validate.



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Creating Profiles, Pads and Draft Angles

In this section, we are going to build the main pad.



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Activate the Sketchericon , then select the XY plane.

Draw the profile with the following parameters:



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Leave the Sketcherby selecting the Exit icon .

Now, activate the Pad icon .

Using the previously created sketch, build a pad with the following parameters (do not forget to select


Activate the Draft icon and enter the following parameters in the Draft Definition dialog box:

You get:



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Creating Pockets and Draft Angles

In this session we are going to build two drafted pockets.

Activate the Sketchericon , then select the following face.



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Draw the profile with the following caracteristics:

Add four corners (R=2) to get the following profile:



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Now activate the Pocket icon and enter the following characteristics in the Pocket Definition

dialog box.



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You get:

Use the same method for the other pocket with the following parameters:



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Leave the sketcher and activate the Pocket icon as shown below and enter the following parameters:

You get:



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Now activate the Draft icon and select the following faces:

You get:



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Creating Profiles, Pads and Draft AnglesIn this session, we are going to build a drafted pad.

Activate the Sketchericon , then select the XY plane.

Draw the profile with the following parameters:



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Now, activate the Pad icon .

Using the previously created sketch, build a pad with the following parameters (do not forget to select




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You get:

Activate the Draft icon and enter the following parameters in the Draft Definition dialog box:



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You get:

Creating HolesIn this session we are going to create a counterbored hole and a simple hole and three countersunkholes.



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Now we are going to create the counterbored hole

Select the following face.



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Click on the Hole icon and enter the following parameters:



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Click on Positioning Sketch icon to move and constrain the hole. Then select the two followingelements.

Click on the Constraints Defined in Dialogue Box icon and select Concentricity. Clickto validate



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You get:

Now we are going to create the three countersunk holes.



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Select the following face:

Click on the Hole icon and enter the following parameters:



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Click on the Positioning Sketch icon to move and constrain the hole with the following parameters:



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You get:

Create the opposite side hole with exactly the same parameters.

You get:



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Create the following hole:




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Click on the Hole icon and keep the entered parameters into the Hole Definition dialog box.

In the Hole Definition dialog box, click on Normal to Surface and select the following edge:

Then click on the Positioned Sketch icon to move and constrain the hole with the following parameters:



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You get:

Now we are going to create the simple hole.



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Click on the Hole icon and enter the following parameters in Hole Definition dialog box:



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Click on Normal to Surface and select the following edge:

Click on the Positioning Sketch icon to move and constrain the hole.



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You get:

Creating Pockets

In this session we are going to create the following pocket:



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Activate the Sketchericon , then select the following face:

Draw the following profile and constrain it:



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Now activate the Pocket icon and enter the following parameters in the Pocket Definiton dialogbox.

Click on the More icon



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Click on Normal to Sketch and select the following edge:

Click to validate.

You get:



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Creating FilletsIn this session we are going to create the following edge fillets

Select the following edges:



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Click on the Fillet icon and enter the following parameters:

Click to validate.

You get:



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Now select the following edge:




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Click to validate.

You get:

Now click on the following edge inside the pockets



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Click to validate.

You get:



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Creating Chamfers

In this session we are going to create a chamfer.

Select the following edge:



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Click on the Chamfericon and enter the following parameters:

Click to validate.

You get:



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You can save the part.



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Tee Fitting

We will design this tee fitting screw to practice the various ways of using both the Sketcherand PartDesign workbenches for designing parts.

Once CATIA is running, activate the Part Design Workbench if necessary (Through the Start menu).



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Creating Pads

In this section, we are going to build four simple pads corresponding to a quarter of the Tee Fitting.



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We are going to build this pad:

Then this one:

Then this one:



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And finally this one:


2. Activate the Rectangle icon and using the grid, create the following rectangle:



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4. Now, activate the Pad icon , then create a pad with the following parameters:

5. Activate the Sketchericon , then select the following face:



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6. Using the grid, build the following lines:





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10. Using the grid, build the following lines:





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14. Using the grid, build the following profile:



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15. Add the following corners:

16. Using the grid, create the following strait line:



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17. Activate the Trim icon and trim the corners with the strait line in order to get:



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18. Delete the two following lines:



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You get :

Draft Angles and Fillets

In this section, we are going to build the following draft angles (green) and fillets (red):



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1. Activate the Draft Angle icon and create a draft angle with the following parameters:




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4. Activate the Edge Fillet icon and create a fillet on the edge with the following parameters:



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5. Activate the Edge Fillet icon and create a fillet on the three edges with the followingparameters:




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You get :

Holes CreationIn this section, we are going to build the two following holes:



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1. Activate the Hole icon then select the following face:

2. Enter the following parameters in the dialog box (Extension tab):



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3. Enter the following parameters in the dialog box (Type tab):

4. Select the Extension tab then activate the Positioning Sketch icon from thedialog box.



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5. Using the Ctrl key, select the edge and the point as shown below.

6. Activate the Constraints Defined in dialog Box icon

7. Select the Concentricity option from the dialog box then select OK.



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8. Leave the Sketcherby selecting the Exit icon .You get:

9. Activate the Hole icon then select the following face:



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10. Enter the following parameters in the dialog box (Extension tab):

11. Enter the following parameters in the dialog box (Type tab):



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12. Select the Extension tab then activate the Positioning Sketch icon from thedialog box.

13. Using the Ctrl key, select the edge and the point as shown below.



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14. Activate the Constraints Defined in dialog Box icon

15. Select the Concentricity option from the dialog box then select OK.


You get:



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MirroringIn this section we are going to mirror the part in order to get:



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1. Activate the Mirroricon , then select the following face:




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You get:

3. Activate the Mirroricon , then select the following face:



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You get:



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Mold Core: Shaft Creation

In this section, we are going to build the inside of the tee fitting. To do it, we are going to create a body inwhich we are going to build a solid corresponding to the material to be removed from the main part thenwe will physically remove this body to the part body to get the final result.

1. First of all, we need to insert a new Body. To do it, select the Insert + Body function. The insertedbody becomes automatically the working object.



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The tree becomes:



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2. To better see the core creation, we are going to put the part body in the No Show. Activate the Hide/

Show icon then select the PartBody.

Now, we are going to build the following shaft:



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3. Activate the Sketchericon , then select the ZX plane.

4. Using the grid, create and constrain the following profile:

5. Because we are building a shaft, we need to create an axis. So, activate the Axis icon , thenusing the grid, cearthe the following axis:



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7. Now, activate the Shaft icon then select the previously created sketch.

8. Enter the following parameters in the dialog box, then select OK.

You get:

Mold Core: FilletingIn this section, we are going to create the following fillets:



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1. Activate the Edge Fillet icon and create a fillet on the two edges with the following parameters:

You get:

Mold Core: Shaft Creation

In this section we are going to build the following shaft:



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1. Activate the Sketchericon , then select the ZX plane.

2. Using the grid, create the following profile:

3. Because we are building a shaft, we need to create an axis. So, activate the Axis icon , thenusing the grid, cearthe the following axis:



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5. Now, activate the Shaft icon then select the previously created sketch.

6. Enter the following parameters in the dialog box, then select OK.

You get:



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Mold Core: Filleting

In this section, we are going to create the following fillets:




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You get:

Removing Body

In this section, we are going to remove the core from the main part.

1. We are going to put the part body in the Show. Activate the Hide/Show icon then select thePartBody from the tree.



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2. Place the cursor on the body containing the core (in the tree), then select the Body.2 object +Remove function from the contextual menu (MB3).



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You get:



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You can save the Tee Fitting.



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Meat Mincer Screw

We will design this meat mincer screw to practice the various ways of using both the Sketcherand PartDesign and Wireframe and Surface workbenches for designing parts.

Once CATIA is running, activate the Wireframe and Surface Workbench (Through the Start menu).




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Creating Profiles and Helixes

In this section, we are going to build all the necessary lines for the meat mincer screw. The first elementwill be a sketch representing the section of the screw:

Then a strait line that will be the axis of the helixes.



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Then, we are going to make a point at each sharp corner of the sketch (twelve points).

Then we are going to make twelve tapped helixes starting by the twelve points.



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Then, on a new plane, we are going to sketch a twelve point profile, then we are going to make eachcorner of the profile coincident with each helix extremity.

Now, let us do it !


2. Activate the Profile icon and using the grid, create the following profile:


4. Now, activate the Line icon , then select the Point-Point option from the Line type combo in thedialog box.



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5. In order to create the first point of the line, place the cursor on the Point 1 field then select the CreatePoint command from the contextual menu (Using the third mouse button).

6. A new dialog box appears in which you will be able to define a point. Select the Coordinates optionfrom the Point type combo in the dialog box.

7. As the point coordinates enterX=0,Y=0 and Z=0 in the X=, Y= and Z= fields, then select OK.

8. In order to create the second point of the line, place the cursor on the Point 2 field then select theCreate Point command from the contextual menu (Using the third mouse button).



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9. A new dialog box appears in which you will be able to define a point. Select the Coordinates optionfrom the Point type combo in the dialog box.

10. As the point coordinates enterX=0,Y=0 and Z=200 in the X=, Y= and Z= fields, then select OK.

11. The two necessary points for the line are now created, select OK from the Line dialog box to validatethe line creation.

You get:



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12. Now, we are going to create a point at each sharp corner of the sketch (twelve points). To do it,

activate the Point icon , then select the previously created sketch. Automatically, the point type

option is turned to On curve.

13. Place the cursor on one of the sharp corner of the sketch, and when you see a red dotted circlesurrounding the cursor (This means that the sharp corner has been detected), click on the first mousebutton.



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14. In order to validate the point creation; select OK in the dialog box.

15. The point is now created. Using the same method, create the eleven other points at each sharpcorner of the sketch.

You get:

16. Now, let us create a tapped helix. Activate the Helix icon (access it by selecting the small

arrow in the Spline icon ).

17. Select one of the previously created points as the helix starting point.

18. Select the Axis field in the dialog box. Select the following line.



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19. Enter the following parameters in the dialog box, and then select OK.

You get:



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20. The helix is now created. Using the same method, create the eleven other helixes at each sharp

corner of the sketch.You get:

21. Now, we are going to sketch a twelve points profile on a plane parallel to the XY plane and passingthrough the top point of the axis of the helixes. We need first, to create this plane. Activate the Plane

icon .

22. Select the XY plane.



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23. Select the top point of the axis of the helixes, then select OK.

You get:



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24. Activate the Sketchericon , then select the previously created plane.

25. Activate the Profile icon and using the grid, created the following profile:



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26. Using the contextual menu, delete all the constraints.



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27. With the Ctrl key held down, select the two following points.



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28. Activate the Constraint Defined in Dialog Box icon .

29. Activate the Coincidence option in the dialog box, and then select OK.

You get:



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30. Using the same method, create eleven other coincidences between each helix extremity and eachsharp corner of the profile.

You get:



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All the necessary lines for the screw are created. We can now create a solid part.

Creating a Loft

In this section, we are going to build a solid loft between the two sketches using the helixes as guidelines.

1. Activate the Part Design workbench (Through the Start menu).



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2. Activate the Loft icon .

3. Select the small sketch then the large one.

4. If necessary, modify the closing points and the orientations of the sections in order to get them in the

same direction and with their closing points aligned.5. Select the Guide field.



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6. Select one by one all the helixes, then select OK.

You get:



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2. Select the two following faces of one of the thread.

3. Select the face to be removed, then select OK.

You get:



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4. Using the same method, create three other tri-tangent fillets on the three other threads.

You get:

Creating Variable Radius FilletsIn this section we are going to create the following variable radius fillets:



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1. With the Ctrl key held down select the following four edges (the bottom of each thread):

2. Activate the Variable Radius Fillet icon (access it by selecting the small arrow in the Tri-

Tangent Fillet icon ).

3. Double click on one of the radius dimensions located on the smaller side of the cone and in theappearing dialog box, enter10 as the new radius then select OK.



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4. Using the same method, change the three other radii from 5 to 10 on the smaller side of the cone.



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5. Using the same method, change the four other radii from 5 to 15 on the bigger side of the cone thenselect OK in the main dialog box.

You get:



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Creating a PadIn this section we are going to create the following pad:




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2. Activate the Hexagon icon (access it by selecting the small arrow in the Rectangle icon ).

3. Select origin of the sketcher

4. Using the grid, select the following point:



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You get:




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7. Using the previously created sketch, build a pad with the following parameters (do not forget to selectOK to validate the pad creation):

You get:



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Creating a Groove

In this section we are going to build the following chamfer using the groove function:



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1. Activate the Sketchericon , then select theYZ plane.

2. Activate the Profile icon and using the grid, create the following profile:

If some contraints appear after the profile creation, delete them.

3. Now, we are going to add constraints between the screw and the profile. So, with the Ctrl key helddown, select the top face of the screw then the following edge of the profile.

4. Activate the Constraints Defined in Dialog Box icon .

5. Select the Coincidence option.



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6. Select OK to validate the coincidence creation.

7. Using the same method, create a coincidence constraint between the two following edges.



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8. Now, we are going to create an angular constraint, so, activate the Constraint icon .

9. Select the following edge:




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11. Click at the position you want to get the angular constraint.

12. In order to modify the angular value, double click on the angular dimension. You will get the followingdialog box:



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13. Enter60 in the value field then select OK.

14. Now, we are going to create a linear constraint, so, activate the Constraint icon .

15. Select the following point of the profile:



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16. Select the following edge on the screw:

17. Click at the position you want to get the constraint.



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19. Enter46 in the value field then select OK.



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20. To create a groove, we need to create an axis, so activate the Axis icon .

21. Using the grid, create the following axis:



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23. Now, let us build the groove, so activate the Groove icon and, if necessary, select thepreviously created sketch.

24. Enter the following parameters for the groove, then select OK.



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You get:

Creating a PadIn this section, we are going to create the following pad:



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2. Activate the Circle icon .

3. As the center of the circle, select the origin



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4. Using the grid, select the following point to define the radius of the circle.



7. Using the previously created sketch, build a pad with the following parameters (do not forget to selectOK to validate the pad creation):



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You get:

Creating a Hole

In this section, we are going to create the following threaded hole:



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1. Activate the Hole icon .

2. Select the following face (Because the face is circular, the hole will be centered on the face):

3. Enter the following parameters in the dialog box, then select the Threaded button then theSpecification button.



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4. Enter the following parameters in the Thread Definition dialog box then select OK.

5. Select OK in the Hole Definition dialog box.

You get:



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Creating a Chamfer

In this section, we are going to create the following chamfer:

1. Activate the Chamfericon .




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3. Enter the following parameters in the Chamfer Definition dialog box, then select OK.

You get :



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4. You can save the Meat Mincer Screw.



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Pedal Support

We will design this pedal support to practice the various ways of using both the Sketcherand PartDesign workbenches for designing parts.

The pedal support will be created directly in an already existing assembly.



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Once the assembly already containing a toothing and an empty part representing the pedal support hasbeen loaded, expand the tree as shown below and double click on the PartBody in order to activate thePart DESIGN workbench.



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Rib Creation

In this section, we are going to build the first rib of the pedal support.

1. On the ZX plane, sketch the following rectangle with the following dimensions.

2. On theYZ plane, sketch the following profile with the following dimensions.



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3. Now, activate the Rib icon , and then select the rectangle as the Profile for the rib.

4. Now, select the last sketch as the Center curve for the rib.



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You get:



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Circular Pattern

In this section, we are going to duplicate the rib using the Circular Pattern command.

1. Activate the Circular Pattern icon , and then select the previously created rib. As theReferenceElement, select the XY plane. Enter the following parameters in the Circular Patterndialog box.


You get:



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Tri-Tangent FilletsIn this section, we are going to create the three following tri-tangent fillets.

1. Select the Tri-Tangent Fillet icon , and then select the two following faces.

2. As the Face to remove, select the following face (The red one).



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You get:

4. Repeat the same operations on the two other branch extremities in order to get the following result.



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Filleting

In this section, we are going to create the fol

Date post:	06-Apr-2018
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