Project02

 [Project02-Solid Modeling Assignment 2] [February 4] [2009] This assignment was designed to familiarize us with more of Pro/E’s features, as well as teaching us how to create an assembly of parts. [Andrew Davis 32849158]

Contents

1       Introduction. 3

2       Problem definition / Problem statement. 3

3       Result. 3

3.1         Part

Contents

3.1         Part A.. 3

3.2         The Screw.. 4

3.3         The Spring. 5

3.4         The Engineering Drawing. 6

3.5         The Assembly. 7

1         Introduction

In this assignment, Project02, we had several different goals.  From learning how to create “sweeps” to creating assembly models of parts, this assignment taught me how useful Pro/E can be in creating these features.

Our task for this assignment consisted of multiple parts.  We first had to create a part using only one protrusion and one cut.  Next we had to create the screw part.  Following that, we learned how to create a spring using sweeps.  The last portion of our assignment was to create an assembly.  We first had to create all the parts, then put them into an assembly file, and do some adjusting from there.

3         Result

In this section, I will briefly describe and illustrate each part of this assignment, including all of the parts for the assembly.

3.1       Part A

In part A of this assignment, my job was to create a figure that was located on page 3-30 in the book, using only one protrusion and one cut.  This took me a few tries to get right.  It took some thinking and planning to figure out the best way and in fact the only way, to create this part using only the two commands.  Once I understood how to attack this problem. It was actually quite simple to complete.  You see in the figures that are included on the next page exactly what this part looks like.

 (a) (b)

Figure 1 (a) This is the model that was created in part A of this assignment.  As you can most likely guess, it was difficult to determine the best way to create this part using only one protrusion and one cut. (b) This is a rotated view of Part A.

The best way to create this part is to sketch and extrude the front view first.  After that is finished, you must sketch what you wish to cut out on the side plane, and then remove the material.  That will give you this finished product.

3.2       The Screw

The next part of this assignment was to create the screw.  This was a fairly simple part to complete.  First I had to sketch the outline screw itself.  Once I had this, I just did a revolve around the center axis, and this created my screw.  The difficult part of this model is creating the cuts on the top surface, because they aren’t flat.  I’m sure there are many ways to complete this, but what I did was create a sketch of what I wanted to remove on one side of the screw.  Then I removed the material, and then did a pattern of 4 at 90°.  This gave me the finished product that you see on the following page.

 (a) (b)

Figure 2(a) You can clearly see the patterned cut on the top surface. 2(b) this figure shows a good view of the first revolve done in this model.

3.3       The Spring

This part was very simple.  It consisted of creating a Helical sweep spring.  There is a command in Pro/E that allows you to do just that.  Once you have the part created, it allows you to adjust the pitch of spring, as well as the thickness among other things.

 (a) (b)

Figure (a) A good view of the spring. Figure (b) this clearly shows the pitch of the spring, which is easily edited in Pro/E

3.4       The Engineering Drawing

This section taught us how to create a 2D drawing of our parts. This is very simple.  All you have to is open up your part, and then open a 2D drawing.  You can the insert your part, and create projection views with dimensions off of that part.  This comes in handy in every area of engineering and designing products.  The following figure shows the Pulley drawing.

 (a)

3.5       The Assembly

This part was the most difficult of this assignment.  It asks us to create an assembly file.  This is a very useful tool, since most everything we will be designing from now on will have multiple parts that need to fit together.  Each part in the assembly was simple to make, but the assembly itself took some work.

In the pages that follow I will show you each of the parts, with a very brief description of each, and then finally I will show and describe the final assembly.

 (a) (b)

This Figure shows a model of the base plate.  This part was made using a simple sketch and extrude technique that we used before.  To create the holes, I also used the extrude tool.

 (a) (b)

This is the axel for the pulley.  It was created using a revolve, the sketching and extruding for both the top cut that you can clearly see in figure (a) as well as the key hole which is clearly shown in figure (b)

 (a) (b)

This is a model of the bolt which holds the L-brackets on.  It was created in a similar manner to the axle, except to create the top we used a hexagon, along with a revolved cut to create the pattern.

 (a) (b)

This is called the bushing.  It was just a simple sketch and extrude part, as you can see.

 (a) (b)

The washer, like the bushing, was just a simple sketch and extrude part.

 (a) (b)

This is the L-Bracket.  It was also created by sketching and extruding, however it is slightly more complicated.  We also had to add the holes, which can be done using the “holes” command, or by sketching and cutting the material.

 (a) (b)

This part was a simple assembly, that we called the sub-assembly.  It consisted of three parts, the L-Bracket, the washer, and the bushing.  We created this by adding the parts into the assembly file, and then constraining them so that they are in the positions we want them in.  Once this is done, the part can easily be loaded into our final assembly as is.

The final Assembly is actually a lot simpler than it looks.  It is not very difficult to create an assembly model.  What it consists of is adding the separate components or parts, and then constraining them to another part so they cannot move.  This is a very simple procedure that can be as easy as point and click.  If you are having trouble doing this, Pro/E provides hints that will help you along with your constraining.  The final Pulley Assembly is shown in the pictures that follow on the next page.  As you can see, you can also create an exploded model of your assembly, which is also very simple.  One feature that is not shown is a cross section.  This allows you to see what is going on inside your assembly.  This procedure is also a very simple one.

4         Discussion

This assignment was a difficult one at first, but once I understood how Pro/E wants me to use these different tools, I had relatively little trouble completing any of the components or the assembly itself.

5         Conclusion

So in conclusion, I have learned a lot of new features in Pro/E.  The assembly feature is very nice and easy to use.  It made creating this assembly quite simple once I understood how o use it.  Creating the 2D drawing was also nice and simple.  The spring and the screw, they were also a breeze to create.  This assignment was a very useful learning tool that will most certainly come in handy again.

6         References

1)      1) R. Toogood, Pro/Engineer Wildfire 3.0 Tutorial. Waltham, MA:  ProCAD Books Ltd., 2006.

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HTM_Files.zip
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Andrew Davis,
Feb 4, 2009, 12:23 PM
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PRT_Files.zip
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Andrew Davis,
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Andrew Davis,
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eDrawing_Files.zip
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Andrew Davis,
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