Feature Modeling Project

7/28/2019 Feature Modeling Project

1/81

Feature Modeling Projects

Introduction

Estimated time to complete this course: 2 - 4 hours.

This course contains practice projects to reinforce techniques creating and editing basic

modeling features. The projects include a vessel, stapler housing, piston, pivot plate, and

cover.

Locating the parts

On the toolbar above, click this button for more information about the parts and other

files you need for the activities in this course.

NX Roles

The activities in this course assume that you are using the Essentials with full menus role in

NX. If your system is set to use a different role, you may see different buttons and menus in

NX.

For more information about roles,click here.

Customizing toolbars

Most activities will have a link near the beginning that looks like this:

When you select this link, information is displayed about the necessary toolbar customization

for the course. The lists and tables displayed for each activity are identical throughout the

course.

1
http://void%280%29/http://void%280%29/http://void%280%29/


2/81

Overview of the projects

This course provides extra modeling projects that will give you more practice in creating

parts. A few of the completed projects are pictured below.

2


3/81

Create a vessel

Estimated time to complete this lesson: 15 - 30 minutes.

In this activity, you will create this vessel.

This is a vessel with four holes.

To complete this project quickly, you should be familiar with the following features. Review

these lessons if you are unfamiliar with these features.

Extrude

Edge Blend

Shell

Hole

Instance Feature

Methods used in this project

You will create this vessel.

Click here to play the animation.

3
http://void%280%29/http://void%280%29/


4/81

To create this vessel, you will:

1. Sketch a circle.

2. Extrude the circle to create a solid body.

3. Round off the bottom with a edge blend.

4


5/81

4. Shell the inside of the cylinder.

5. Create a hole through the bottom.

6. Duplicate the hole.

5


6/81

Dimensions of the part

The overall dimensions of the part (in millimeters) are shown below.

Design intent

For this part you need to be able to vary:

Overall diameter and height.

Wall thickness.

Diameter and location of the holes.

6


7/81

Open the part

Open standard_mm and start the Modelingapplication, if it is not started.

The part contains a Datum Coordinate System and uses the following layer standards:

Solid geometry on layers 1 10

Sheet bodies on layers 11 20

Sketch geometry on layers 21 40

Curve geometry on layers 41 60

Reference geometry on layers 61 80

Create the basic shape of the vessel

Sketch a circle and extrude it to create the basic shape of the vessel.

Sketch a circle on the XY plane of the Datum CSYS.

Note:

Review the Sketcher course if you are not familiar with the Sketcher task environment.

7


8/81

Extrude the sketch to create a cylindrical solid body.

Click Extrude or choose Insert Design Feature Extrude.

Select the circle.

In the Extrude dialog box, type 0 in the Start Distance box, 300 in the End Distance

box and click OK.

Round off the bottom of the vessel

You need to round the bottom edge.

Create an edge blend with a radius of25 on the bottom edge.

Click Edge Blend or choose Insert Detail FeatureEdge Blend.

Select the bottom edge of the cylinder.

In the Edge Blend dialog box, type 25 in the Radius box and click OK.

8


9/81

Create a shellYou need to create a shell feature to remove the interior of the cylinder.

Create a shell feature with a wall thickness of10.

Click Shell or choose Insert Offset/Scale Shell.

From the Type list in the Shell dialog box, select Remove Faces, Then Shell type.

Select the top face of the cylinder to pierce.

In the Shell dialog box, type 10 in the Thickness box and click OK.

9


10/81

Create the first hole

Now you can create the first hole through the bottom of the vessel.

Create a hole through the bottom of the part. Select the placement face near the desired

location.

Click Hole or choose InsertDesign FeatureHole.

In the Hole dialog box, click Simple .

In the Diameterbox, type 50.

For the placement face, select the inside bottom face of the vessel.

For the thru face, select the outside bottom face.

Click OK.

Position the hole

Position the hole on the X-axis of the Datum CSYS and perpendicular to the Y-axis at a

distance of230.

In the Positioning dialog box, click Point onto Line .

For the target edge, select the X-axis of the Datum CSYS.

In the Positioning dialog box, click Perpendicular .

For the target edge, select the Y-axis of the Datum CSYS.

Type 230 in the value box and click OK.

10


11/81

Note:

The hole may appear on the opposite side of the Y-axis depending on where you initially

selected the placement face. This is not important because you will be creating an instance

array.

Add the remaining holes

To create the remaining holes on the bottom of the vessel, you can create a circular instance

array.

Create a circular instance array of the hole.

Click Instance Feature or choose Insert Associative Copy Instance

Feature.

Click Circular Array.

From the list in the Instance dialog box, select the hole feature and click OK.

In the Instance dialog box, click General.

11


12/81

Type 4 in the Numberbox, 90 in the Angle box and click OK.

Click Datum Axis.

Select the Z-axis of the Datum CSYS.

In the Create Instances dialog box, clickYes.

Modify the part

You can edit the following parameters to test the associativity:

Outside diameter and height of the vessel.

Thickness.

Diameter and location of the hole.

Number of holes.

Close the part.

12


13/81

Create a stapler housing


In this activity, you will create a stapler housing.



Extrude

Trim Body

Edge Blend

Shell

Hole


You will create this stapler housing.


13


14/81

To create this part, you will:

1. Sketch the basic profile.

2. Extrude the sketch to create a solid body.

3. Sketch the upper profile and extrude to create a sheet body.

4. Trim the solid body using the sheet body.

14


15/81

5. Add edge blends.

6. Shell the inside of the solid body.

7. Round off the small lower edges.

8. Add holes.

15


16/81



Design intent

For this part you need to be able to vary:

Wall thickness.

Overall dimensions of the part.

Diameter of the hole.

16


17/81

Open the part








Create the basic shape of the stapler housing

Use a sketch and extrude feature to create the basic shape of the part.

Sketch the shape shown below on the X-Y plane of the Datum CSYS.

17


18/81

Note:

Review the Sketcher course if you are not familiar with the Sketcher task environment.

Extrude the sketch for25 mm to create a solid body.

Click Extrude .

Select the sketch.


box, and click OK.

18


19/81

Sketch the top profile

Use a sketch to define the top profile.

Sketch the line and arc shown below on the Y-Z plane of the Datum CSYS.

Note:

You can use Point on Curve and Collinearconstraints to associate the sketch to the edges of

the solid body.

19


20/81

Create the sheet body

Extrude the sketch to create the trimming sheet body.

Extrude the sketch 40 mm on both sides to create a sheet body.

Click Extrude .

Select the sketch.

From the Start list, select Symmetric Value.

In the Start Distance box, type 40 and click OK.

Use the surface body to trim the solid body

Trim the solid body to the sheet body you just created.

Trim the solid body.

Click Trim Body .

Select the solid body.

Click the middle mouse button.

20


21/81

Select the sheet body, and click OK.

Make sure the arrow is pointing upward. If it is pointing downward, click Reverse

Direction .

Move the sheet body to another layer.

Add edge blends

You now need to blend the edges as shown below.

Blend the two vertical shown below edges using a radius of4.

Click Edge Blend .

Select the two vertical edges.

Type 4 in the Radius box and click OK.

Blend the four vertical edges shown below using a radius of25.

21


22/81

Blend the top tangent edges using a radius of2.

Create a shell

You need to create a shell feature to remove the interior of the stapler housing.

Create a shell feature with a wall thickness of1.5. Pierce the bottom face and the front

vertical face.

Click Shell .

From the Type list in the Shell dialog box, select Remove Faces, Then Shell.

22


23/81

Select the bottom face and the front vertical face of the solid to pierce.

In the Shell dialog box, type 1.5 in the Thickness box and click OK.

Blend the small bottom edges

You now need to blend the small edges at the bottom of the part.

Blend the two small edges shown below using a radius of5.

Create the holeNow you can create a hole through the vertical walls of the stapler housing.

Create a hole through the vertical walls of the part. Make sure it is concentric with the blend

you created in the previous step.

Click Hole .


23


24/81


For the placement face, select the right vertical face of the wall.

For the thru face, select the left vertical face on the other side of the part and click OK.

Continue to create the hole

Position the hole to be concentric with the edge blend.

Click Point onto Point .

Select the circular edge of the edge blend you created in the previous step.

In the Set Arc Position dialog box, click Arc Center.

Modify the part

You can edit the following parameters to test the associativity of the stapler housing.

Overall length, width, and height.

Thickness.


24


25/81

Close the part.

25


26/81

Create a piston


In this activity, you will create a piston.


these lessons if you are unfamiliar with these features

Extrude

Shell

Hole

Instance

Extrude

Draft

Edge Blend

Groove

26


27/81

Chamfer


In this activity, you will create a piston.


In this project you will:

1. Sketch and extrude a circle.

2. Create a shell to define the basic shape.

3. Add support material inside the piston.

27


28/81

4. Create a hole through the support material.

5. Duplicate the support material and hole.

6. Add draft.

7. Add edge blends.

8. Add two grooves on the outside face.

28


29/81

9. Chamfer the outside edges of the holes.


The overall dimensions of the part (in millimeters) are shown below. For clarity, the draft and

edge blends are not shown.

29


30/81

Design intent

There are a few symmetric features in a typical piston so you can use the Mirror commands

to make them assocative. In addition to symmetrical design, you will need to be able to vary

the following parameters:

Overall diameter and the wall thickness.

Size and location of the support material.


Location of the grooves.

Open the part


The standard part uses the following layer standards:






30


31/81

Model the basic shape of the part

Your first task is to model the basic shape of the part. One way to do this is to sketch a circle

and extrude it to create a cylinder.

Sketch the circle shown below.

Extrude the sketch for25 mm to create a cylinder.

31


32/81

Click Extrude .

Select the circle.


box and click OK.

Create a shell

You need to create a shell feature to remove the interior of the cylinder.

Create a shell feature with a wall thickness of1.5 and an alternate thickness of5 to the top

face.

Click Shell .

32


33/81

From the Type list in the Shell dialog box, select Remove Faces, Then Shell type.

Select the bottom face of the cylinder to pierce.

In the Thickness box, type 1.5.

Expand the Alternate Thickness group.

In the Alternate Thickness group, click Select Face.

Select the top face of the cylinder.

In the Thickness 1 box, type 5 and click OK.

Add the support material

You need to add support material inside the shell to increase the thickness for the piston pin-

connecting rod joint.

Sketch the shape shown below on the X-Z plane of the datum CSYS.

33


34/81

Note:

Pay attention to the constraints and the reference center lines.

Extrude the sketch to create the support material.

Click Extrude .

Select the sketch.

In the Extrude dialog box, type 5 in the Start Distance box.

From the End list in the Limits group, select Until Selected.

Select the inside wall of the piston.

From the Boolean list, select Unite and click OK.

Create the piston-pin joint holeNow you can create a hole through the support material and the piston wall.

34


35/81

Create a 4 mm diameter hole through the support material.

Click Hole .



For the placement face, select the inside flat face of the support material.

For the thru face, select the outside wall of the piston, and click OK.

Position the hole at the center of the circular part of the support material.


Select the circular edge of the support material.

In the Set Arc Positioning dialog box, click Arc Center.

Mirror features

The support material and pin hole are symmetric features in a common piston. You want to

be able to modify these in one side and have the same modification occur on the other side.

In order to achieve this design intent, you can mirror these features to the other side. In this

case, any later changes or modification will be applied to the mirrored copy as well.

35


36/81

Mirror features using the XZ plane of the datum CSYS as your mirror plane.

Click Mirror Feature .

Select the hole and the extrude for the support material.

In the Mirror Feature dialog box, click Select Plane.

Select the X-Z plane of the datum CSYS and click OK.

Draft the inner faces of the support material

This piston is made of aluminum cast. You need to draft the inside walls to be able to

manufacture this part.

You can first draft the vertical walls of the support material.

36


37/81

Draft the vertical planar faces of the support material.

Click Draft .

From the Type list, select From Plane.

Select the planar inside face to define the draw direction. The vector should point

downward.

In the Stationary Plane group, click Select Plane.

Select the same face again to define the stationary plane.

In the Faces to Draft group, click Select Face.

Select the two flat faces of the support material.

37


38/81

In the Angle 1 box, type 1 and click OK.

Draft the inside wall of the piston

You need to draft the inside cylindrical wall.

Draft the inside cylindrical face.

Click Draft .

From the Type list, select the From Plane.

Select the bottom planar face between the inner and outer walls to define the draw

direction. The vector should point downward.

38


39/81

In the Stationary Plane group, click Select Plane.

Select the bottom planar face again to define the stationary plane.

In the Faces to Draft group, click Select Face.

Select the inside cylindrical wall of the piston.

In the Angle 1 box, type 1 and click OK.

Blend the outside edges of the extrude (support material)

39


40/81

Add a 1 mm blend around the outside edges of the support material.

Click Edge Blend .

From the Curve Rule list in the Selection Bar, select Tangent Curves.

Select the outside edges of the support material on both sides.

In the Radius box, type 1 and click OK.

Blend the inside curves of the piston head

Add a 2 mm blend to the inside edges of the piston head.

Click Edge Blend .

40


41/81

Select the two inside edges of the piston head.

In the Edge Blend dialog box, type 2 in the Radius box and click OK.

Add two more edge blends

Add a 1 mm blend to the inside edges of the support material.

Add a 0.5 mm blend to the bottom inside edge of the wall.

41


42/81

Create the piston ring grooves

You need to create two grooves on the outside cylindrical face of the piston. These grooves

are called piston ring grooves.

Create a groove 3 mm from the top edge.

Click Groove .

In the Groove dialog box, click U Groove.

Select the outside cylindrical face of the piston.

In the U Groove dialog box, type 29 in the Groove Diameterbox, 1 in the Width box,

0.3 in the Corner Radius box, and click OK.

Select the top circular edge of the piston head as the target edge.

Select the top circular edge of the groove as the tool edge.

42


43/81

In the Create Expression dialog box, type 3 in the box and click OK.

Create a second groove 5 mm from the top edge.

Chamfer the outside edges of the holes

You can complete the model by adding a chamfer to the outside edges of the holes.

Chamfer the outside edges of the holes using a distance of0.5 mm.

Click Chamfer .

In the Chamferdialog box, from the Cross Section list, select Symmetric.

In the Distance box, type 0.5 and press Enter.

Select the outside edge of the holes on both sides of the part.

Click OK.

Modify the part

You can dit the following parameters to test the associativity of the features:

Outside diameter.

43


44/81

Wall thickness.

Size of the support material.

Size of the hole.

Size and location of the grooves.

Close the part.

44


45/81

Create a pivot plate


In this activity, you will create a pivot plate.

This is a plate with a pivot boss on its underside and several mounting holes.



Extrude

Datum Plane

Hole

Edge Blend

Chamfer


You will create this pivot plate with extruded features, counterbored holes, simple holes,chamfer, and edge blends.


45


46/81


1. Sketch the profile of the plate.

2. Extrude the sketch.

3. Sketch and extrude a rectangle to create the pivot boss.

4. Unite the two solid bodies.

5. Create a hole through the pivot boss.

46


47/81

6. Add a tooling hole and three counterbored holes.

7. Add a chamfer to the front and back edges of the pivot boss.

8. Add edge blends.



A large hole goes through the pivot boss.

47


48/81

Design intent

For this part you need to be able to:

Change the length of the plate, but keep the counterbored holes (and the tool hole) the

same distance from the edges.

Change the dimensions of the cut out area but keep it centered between the left and

right edges of the part.

Change the dimensions of the pivot boss or the hole that goes through it, but keep the

hole centered within the structure.

Change the dimensions of the chamfer on the pivot boss.

Open the part








48


49/81

Sketch the profile of the plate

You can begin by sketching and extruding the profile of the plate.

Make layer21 the work layer.

Sketch the profile below on the X-Y plane of the Datum CSYS.

The vertical reference line is constrained to connect the center points of the two horizontal

lines. It is also collinear with the Y axis of the Datum CSYS.

Note:

Review the Sketcher course if you are not familiar with the Sketch task environment.

Extrude the sketch of the plate profile


Extrude the sketch.

Click Extrude or choose InsertDesign FeatureExtrude.

49


50/81

Select the sketch.


box and click OK.

Sketch the pivot boss

The pivot boss is on the underside of the plate. Sketch a rectangle and extrude it to create

the pivot boss.


Create a sketch on the Y-Z plane of the Datum CSYS.

Sketch a rectangle with the dimensions shown below.

50


51/81

Extrude the sketch of the pivot boss


Extrude the sketch and unite it to the plate.

Click Extrude or choose InsertDesign FeatureExtrude.

Select the rectangular sketch.

In the Extrude dialog box, select Symmetric Value from the Start list and type 100 in

the Distance box.


Create a datum plane to position the pivot hole

You need to create a hole through the pivot boss and center in on the right face.

You can use two datum planes to help position the hole.

51


52/81


Create a datum plane that is centered between the bottom face of the plate and the bottom

face of the pivot boss.

Click Datum Plane or choose InsertDatum/PointDatum Plane.

Select the bottom face of the plate.

Select the bottom face of the pivot boss and click OK.

Create another datum plane

Create another datum plane that is centered between the front and back faces of the pivot

boss.


Select the front face of the pivot boss.

Select the back face of the pivot boss and click OK.

52


53/81

Create the pivot hole

Now you can create the hole through the pivot boss.

Create a hole that goes through the pivot boss.



For the placement face, select the right face of the pivot boss.

For the thru face, select the left face of the pivot boss.

In the Hole dialog box, type 60 in the Diameterbox and click OK.

Position the pivot hole

Position it in the center of the right end of the pivot boss.

In the Positioning dialog box, click Point onto Line.

Select the vertical datum plane that is centered in the pivot.

In the Positioning dialog box, click Point onto Line again.

Select the horizontal datum plane that is centered in the pivot and click OK.

53


54/81

Create a tooling hole

You need to create a small hole through the front left side of the plate.

You can hide the datum planes or move them to another layer.

Make layer1 the work layer, then make layer62 invisible.

Create a simple hole on the top face of the plate near the left, front corner.


In the Hole dialog box, click Simple.

For the placement face, select the top face of the plate.

For the thru face, select the bottom face of the plate.

In the Hole dialog box, type 12.5 in the Diameterbox and click OK.

Position the hole at this location on the plate.

54


55/81

In the Positioning dialog box, click Perpendicular.

Select the bottom front edge of the plate.

In the Positioning dialog box, type 32 in the value box.

In the Positioning dialog box, click Perpendicularagain.

Select the bottom left edge line of the plate.

In the Positioning dialog box, type 32 in the value box and select OK.

Create the first counterbored hole

You need to add three counterbored holes to the part.

Each hole will be drilled completely through the plate from the bottom face.

Create a counterbored hole on the bottom face of the plate near its front left side.


In the Hole dialog box, click Counterbore.

Type the parameters of this feature (35, 12.5, 18).

55


56/81

For the placement face, select the bottom face of the plate.

For the thru face, select the top face of the plate.

Position the hole at this location on the left side of the plate.

Click Perpendicular.

Select the bottom front edge of the plate.

In the Positioning dialog box, type 70 in the value box.

Click Perpendicularagain.

Select the bottom left edge of the plate.

In the Positioning dialog box, type 70 in the value box and click OK.

Create the second counterbored hole

Create a similar counterbored hole on the bottom right face of the plate.

56


57/81

Position the hole at this location on the right side of the plate.

Create the third counterbored hole

The last counterbored hole is near the back of the part.

To position this counterbored hole, you will want to be able to use the datum CSYS.

Make the layer61 selectable.

Create a third counterbored hole on the bottom face of the block with the same parameters

as the other two.

Position the hole at this location near the back side of the part. Keep it centered between the

left and right sides of the block.

57


58/81

Click Point onto Line.

Select the Y-axis of the Datum CSYS.

Click Perpendicular.

Select the back bottom edge of the plate.

In the Positioning dialog box, type 28 in the value box and click OK.

Chamfer the edges of the pivot boss

The pivot boss needs to have its two lower edges chamfered.

Chamfer the front and back bottom edges of the pad.

Click Chamfer or choose InsertDetail FeatureChamfer.

In the Chamferdialog box, select Symmetric from the Cross Section list.

Select the front and back bottom edges of the pad.

In the Chamferdialog box, type 20 in the Distance box and click OK.

58


59/81

Tip:

You can also use the drag handles to edit the chamfer value.

Add edge blends

There are many edges in this part that will be rounded as part of the casting process.

Blend the vertical edges using a radius value of6.

Click Edge Blend or choose InsertDetail FeatureEdge Blend.

Select the edges shown below.

In the Edge Blend dialog box, type 6 in the Radius box.

Blend the tangent edges around the bottom edges of the plate. Use the same blend radius.

59


60/81

Blend all of the edges around the pivot boss under the plate with the same radius blend.

Modify the part

You can make the following changes to test the associativity:

Size of the plate and pivot boss by editing the appropriate sketches and extrude

features.

If you change the length of the plate, all of the features positioned on Datum CSYS

should remain centered in the plate. The holes will remain positioned the same distance

from the edges of the plate.

If you change the height of the plate, the counterbored holes and the tooling hole will

adjust to the new height of the thru face.

If you change the size of the pivot boss, the hole that goes through it will remain

centered.

Close the part.

60


61/81

Create a cover plate

Estimated time to complete this lesson: 1 hour.

In this activity, you will create a cover plate.

This is a plastic cover that will be made from a mold.



Extrude

Datum Plane

Edge Blend

Draft

Shell

Instance Feature

Slot

Boss

Hole

Pad

61


62/81


You will create this cover plate.



1. Sketch the basic shape.

2. Extrude the sketch to create a solid body.

3. Round off the right vertical edges.

4. Add draft to the sides walls.

5. Round off the bottom edges

6. Shell the inside of the part.

62


63/81

7. Add a lip around the curved side of the part.

8. Add a slot to the right face of the part.

9. Add another slot to the right face.

10. Create support material and a hole for a mounting screw.

11. Duplicate the mounting screw material and the slot to the front of the part.

12. Add more support material and a hole to the floor.

13. Add interior edge blends.

63


64/81


The basic dimensions of the part are shown below (in millimeters).

Design intent

You will need to modify the following parameters:

Overall length, width, and height.

Size and location of the mounting holes and the material surrounding them.

Size and location of the cutouts on the right wall of the part.

Radius of blends on the edges.

The rectangular pad must remain along the center in the part.

The two horizontal cutouts and mounting bosses must remain equidistant from the

centerline of the part.

Callout Part of Model Command

1. Mounting Bosses Boss, Hole, Blend

2. Cutouts Slot

64


65/81

Open the part


The standard part uses the following layer standards:

Solid geometry on layers 1 10.

Sheet bodies on layers 11 20.

Sketch geometry on layers 21 40.

Curve geometry on layers 41 60.

Reference geometry on layers 61 80.

Create the basic shape of the part

You can begin by sketching the basic shape. You can then extrude the sketch to create asolid body.

Sketch the profile shown below on the X-Y plane of the Datum CSYS.

65


66/81

Extrude the sketch to create the basic solid shape of the part.

Click Extrude .

Select the sketch.

Type 0 in the Start Distance box, type 8 in the End Distance box, and click OK.

Round off the vertical edges

You need to round off the vertical edges on the right side of the part.

Add edge blends to the vertical edges.

Click Edge Blend .

Select the two vertical edges on the right side of the part.


66


67/81

Draft the side of the part

You need to apply draft to the sides of the part.

Add draft to the vertical faces.

Click Draft .

From the Type list, select From Plane.

Select the Z-axis of the Datum CSYS so the draw direction vector points upward.

Click Select Plane.

Select an end point on the bottom of the part.

Click Select Face.

From the Face Rule list in the Selection Bar, select Tangent Faces.

Select the vertical faces on the sides of the part.

Type3 in the draft angle box, and Click OK.

67


68/81

Blend the bottom edges

You need to round the bottom edges of the part.

Blend the bottom edges.

Click Edge Blend .

From the Curve Rule list in the Selection Bar, select Tangent Curves.

Select the bottom edges of the part.


Create the walls of the part

You can now shell out the solid to create the walls.

Shell the solid to create the walls.

Click Shell .

68


69/81

From the Type list, select Remove Faces, Then Shell.

Select the top face to be pierced.

In the Thickness box, type 1 and click OK.

Create a cutout in the right end of the part

You need to create the small cutout through the top of the right wall.

Create a rectangular slot. Place the slot on the tapered wall and associate the depth to the

thickness of the wall.

Click Slot or choose InsertDesign FeatureSlot.

Clear the Thru Slot check box.

Click Rectangularand OK.

Select the outside right face.

For the horizontal reference, select the Z-axis of the Datum CSYS.

In the Rectangular Slot dialog box, type 7 in the Length box and 4 in the Width box.

In the Depth box, click Parameter Entry Option and select Reference.

In the graphics window, click one of the internal faces to select the shell feature.

The shell thickness parameter should appear in the Parameter Selection dialog box.

In the Parameter Selection dialog box, click OK.

69


70/81

In the Rectangular Slot dialog box, click OK.

Position the cutout

Position the slot on the top edge of the right wall so that only half of it actually creates the

cutout.

Click Line onto Line .

Select the top outside edge of the right wall.

Select the horizontal centerline of the slot tool.

Click Point onto Line .

Select the X-axis of the Datum CSYS.

Select the vertical centerline of the slot tool.

Add support material around the curved upper edge of thepart

The part requires extra material around the top of the round (left) end.

You can create this material by extruding the inside edge.

70


71/81

Extrude the top inside circular edge to create a lip around the inside of the part. Be sure the

direction of the extrusion will be downward, and offset the extrusion into the part.

Click Extrude .

From the Curve Rule list in the Selection Bar, select Single Curve.

Select the top inside circular edge.

In the Extrude dialog box, type 0 in the Start Distance box and 1 in the End Distance

box.

Note:

Make sure the extrude direction is pointing downward. If it is pointing up, click Reverse

Direction .

Expand the Offset group and select Two-Sided from the Offset list.

Type 0 in the Offset Start box and type1 in the Offset End box. (You may need to

use a positive value, depending on the direction of the offset vector.)


Create a slot on the right wall

Two slots required in the right wall. You can create one of the slots and mirror it to the other

side.

71


72/81

Create a slot on the right wall near the back. Use a depth that is associated to the wall

thickness. Make the length of the slot parallel to the top edge of the right wall.

Click Slot or choose InsertDesign FeatureSlot.

Clear the Thru Slot check box.

In the Slot dialog box, click Rectangular.

Select the right outside face.

For the horizontal reference, select the top edge of the right outside face.

In the Rectangular Slot dialog box, type 6 in the Length box and 2 in the Width box.

In the Depth box, click Parameter Entry Option and select Reference.

In the graphics window, click one of the internal faces to select the shell feature.

The shell Thickness parameter should appear in the Parameter Selection dialog box.

In the Parameter Selection dialog box, click OK.

In the Rectangular Slot dialog box, click OK.

Position the slot

Use the top edge of the wall to position the slot.

Click Parallel At a Distance .

Select the top outside edge of the wall.

Select the horizontal centerline of the slot tool.


Click Perpendicular .

Select the Z-axis of the Datum CSYS.

Select the vertical centerline of the slot tool.

72


73/81


Plan the modeling method for the mounting screw material

The cover plate is held in place with two mounting screws. Your next task is to create the

material that will support the screws.

You can accomplish this by creating two bosses with a counterbored hole through them. You

can then mirror them to the other side of the part.

Create the first boss

Create a boss on the inside face at the bottom of the part.

Click Boss or choose InsertDesign FeatureBoss.

Select the inside face at the bottom of the part.

In the Boss dialog box, type 6 in the Diameterbox, 2 in the Height box, 3 in the Taper

Angle box, and click OK.

73


74/81

Position the boss from the axes of the Datum CSYS.

Click Perpendicular .

Select the X-axis or Y-axis of the Datum CSYS and type the appropriate distance as

shown below.

Repeat with the other axis.

Create a second boss

You can finish the support material needed by adding a second boss on top of the first boss.

Create another boss on top of the first boss.

Click Boss or choose InsertDesign FeatureBoss.

Select the top face of the existing boss.

In the Boss dialog box, type 4 in the Diameterbox, 2 in the Height box, 3 in the Taper

Angle box, and click OK.

74


75/81

Center the boss on the top face of the first boss.


Select the top edge of the first boss.

In the Set Arc Position dialog box, click Arc Center.

Create the counterbored hole

You can now create a counterbored through the bosses.

Create a counterbored hole on the bottom outside face of the part that goes through both

bosses.


In the Hole dialog box, click Counterbore.

Type 4 in the C-Bore Diameterbox, 2 in the C-Bore Depth box and 2 in the Hole

Diameterbox.

For the placement face, select the bottom outside face of the part.

For the thru face, select the top face of the upper boss.

Use the Point onto Point positioning option to center the hole with the bosses.

75


76/81

Duplicate the counterbored hole and rectangular slot

You can now duplicate the mounting hole material and the rectangular slot to the front side of

the part by mirroring them.

Mirror the slot, two bosses and counterbored hole through the X-Z plane of the Datum CSYS.

Click Mirror Feature or choose InsertAssociative CopyMirror Feature.

Select the features to mirror (slot, counterbored hole and two bosses).

Click the middle mouse button to specify the mirror plane.

Select the X-Z plane of the Datum CSYS as the mirror plane and click OK.

Create a datum plane to position the pad

You will want to keep both the pad and the hole that will go through it a specific distance from

the Datum CSYS. You can create a datum plane at this location to help position the features.

Make layer62 the Work Layer.

Create a datum plane offset 20 mm from the Y-Z plane of the Datum CSYS.


Select the Y-Z plane of the Datum CSYS.

In the Distance box, type 20 and click OK.

76


77/81

Add a mounting pad

You need to add a rectangular pad to the floor and position it on the X-axis of the Datum

CSYS at a certain distance from the Y-axis.

Make layer1 the Work Layer.

Add a rectangular pad to the inside face at the bottom of the part.

Click Pad or choose InsertDesign FeaturePad.

Click Rectangular.

Select the inside face at the bottom of the part.

For the horizontal reference, select the offset datum plane.

In the Rectangular Pad dialog box, type the following values:

o Length = 20

o Width = 15

o Height = 2

o Corner Radius = 2

77


78/81

o Taper Angle = 3

Click OK.

Position the pad

Position the pad on the X-axis of the part and on the offset datum plane.

Change the Rendering Style to Static Wireframe so that you can see the tool

centerlines.

Click Line onto Line .

Select the X-axis of the Datum CSYS.

Select the vertical centerline of the pad tool.

Click Point onto Line .

Select the offset datum plane.

Select the horizontal centerline of the pad tool.

78


79/81

Create a hole through the pad

When you create the hole, you can position it at the same location as the pad.

Create a simple hole that goes through the bottom of the part and the pad.

Click Hole .

Click Simple .


For the placement face, select the top face of the pad.

For the thru face, select the bottom face of the part.

79


80/81

Use the Point onto Line option to position the hole on the X-axis of the Datum CSYS

and on the offset datum plane.

Blend the inside edges of the part

The base of the pad and the two bosses need to be blended into the floor.

Add a 2 mm edge blend at the base of the pad and a 1 mm edge blend at the base of the

bosses.

Click Edge Blend .

Select the bottom edges of the pad.

In the Radius box, type 2 and click Apply.

Select the bottom edges of the bosses.


Modify the part

You can edit the following parameters to test the associativity of the part.

Overall length, height, and width.

Radius of the blended edges.

Size and location of the mounting bosses.

Size and location of the cutouts.

Size and location of the mounting pad.

The pad and cutout should remain centered in the part. The two horizontal cutouts and

mounting bosses should be equidistant from the centerline of the part.

80


81/81

Close the part.

Documents

Feature Modeling Project