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ME-430 INTRODUCTION TO COMPUTER AIDED DESIGNWindmill Parallel Blend Option

Pro/ENGINEER Wildfire 2.0

Dr. Herli Surjanhata

Figure 1

Step 1:Create revolve protrusion for the hub as shown in Figure 2 below. Note that the

location of center of the arc is in PRT_CSYS-DEF. Make sure you create a verticalcenterline as axis of revolution, and the diameter of the hub at the bottom is 14

inches.

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Figure 2 Revolve section of the hub

Step 2:

Click the Create datum plane icon to createa new datum plane DTM1 through axis A_2, and -

30 angle with FRONTdatum plane.

Pick the A-2 axis, and while holding down Ctrl key,

pick FRONT datum plane.

Enter Value for rotation - 30

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Figure 3

Step 3:

From Insert pull down

menu, select Blend ->Protrusion

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For the Blend option, select Parallel -> Regular Sec ->Sketch Sec -> Done.

Smooth blend is used to for blending the three sections of

the blade.

Smoth -> Done

Use DTM1 as sketching plane, and TOP datum plane as top reference. Pick the A_2

axis and TOP datum plane as the references.

Create THREE sections as shown in the Figures 4, 5 and 6.

Be sure to use to create points needed to locate the

centerlines and location of the center of the circular part of the

section.

Sketch the first section as shown in Figure 4. Click icon to continue, and from

Sketch pull-down menu, select Feature Tools -> Toggle section.

Continue with sketching the second section as shown in Figure 5, click icon to

continue, and from Sketch pull-down menu, select Feature Tools -> Togglesection.

And finally sketch the third section as shown in Figure 6. When you are done,

click icon to continue, Blind -> Done.

Enter 17.5 inches for the depth

between sections.

Select OK button

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Figure 4 Section 1. Note that the arcs dimension is in diameter.

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Figure 5 Second Section shown in red

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Figure 6 The last section shown in red. Note that Section 1 is the largest, and

sketched in DTM1. Section 2 is the second largest and third section is smallestrepresenting the tip of the blade.

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Step 4:

Create a group named blade for patterning.

From Edit pull down menu,

select

Feature Operations

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Group -> Create -> Local Group

Enter group name: blade

Click the icon.

Continue with picking DTM1 and the first blade created in Step3. The easy way to do is to select the features from the Model

Tree.

Done/Return -> Done

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Step 5:

Pattern the local group

blade by selecting:

Click -> Pick theGroup BLADE from the

Model Tree.

Select Dimensions tabto expand it.

Click 30 angle

between FRONT &DTM1 for Direction 1.

Enter dimension

increment = 120[Enter]

Enter TOTAL number ofinstances in the

direction (includingoriginal) = 3

Click on the .

The blade pattern is

created.

Save the part.

Step 6:

Create a revolved cut in the hub as shown below.

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Figure 7 The section for revolved cut.

The resulted cut is shown below:

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Step 7:

Create a hole at the center of the post with the diameter of 2 inches and 8 inches

depth.

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Step 8:

Create ribs to strengthen the post.

Click .

Select References -> Define.

Pick DTM1 as sketching plane, select Top as Reference, and Top Orientation will

be automatically selected.

Click Sketch.

Click to change the view to

hidden line.

Zoom in to the hub area.

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Select references as shown below and click Close.

Draw a horizontal line asshown.

Click .

Pick these as references.

Draw this line.

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Enter 1 as the thickness of the rib.

Click .

The resulted rib is shown below:

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Pattern the rib.

Select Rib1 in the Model Tree.

Pick .

Click .

Add keyway, rounds and chamfer as shown below use your own dimensions:

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Section for keyway, and depth of thecut is 2 inches.

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Save the model.