1 Introduction. 3
2 Problem definition / Problem statement. 3
3 Result. 3
3.1 The Sweep. 3
3.2 The Blend. 4
3.3 Toothpaste. 5
3.4 The Cell Phone. 6
4 Discussion. 15
5 Conclusion. 15
6 References. 15
In this, our third solid modeling assignment, we learn some new tolls that Pre/E has that make this program very useful. We learned how to use the Sweep command, as well as the blend and the warp commands. Then we got some very good practice making assemblies with creating a model of a cell phone.
Our task for this assignment consisted of multiple steps. The first three parts of this assignment were simple models that required very few steps, but taught us new commands. The last portion of this assignment was much more complicated. It called for us to create a variety of parts, and then create an assembly of these parts.
In this section, I will briefly describe and illustrate each part of this assignment, including all of the parts for the assembly.
This part was very simple to create. As you can see from the figures on the following page, it is not a very complex part. There is one simple sketch and protrusion, which is attached to the sweep part. The sweep, once instructed on how to use this command, is very simple. The first thing you must do is create a sketch of the curve you want the sweep to follow. Then, you must define the cross section shape and dimensions of the sweep. In this model, we used the shape of an I-beam.
Figure (a) You can see the simple protrusion, as well as the shape and direction of the sweep. Figure (b) is simply another view of this model.
The next part in this assignment was also a simple one. It required the use of the Blend command, which is very simple to use. All that it requires you to do is draw the cross-sections of the sections that you want to be blended together. As you can see from the figures on the following page, we have three different cross-sections defined. Once you have these defined, the blend command will connect all of these cross-sections together. You can choose to have these edges either straight or smooth. My edges are smooth, which is why it may be difficult to see the difference between all three cross-sections.
Figure (a) This figure shows a side view of the completed blend with smooth edges. Figure (b) This shows another view of the completed blend.
This part was slightly more complex than the previous parts. It first required us to create the tube by using a blend. Then we had to use a revolved protrusion to create the cap. Once we had these parts use a new command called the shell command. This makes our part into a shell of itself, hollowing out the inside. Once this is done, we use the warp command. This calls for us to create a spline curve above the toothpaste bottle, and once that is done, the warp command allows us to use this curve to create the deformations such as the ones in my model on the next page.
Figure (a) This figure shows the blended feature, along with the warped surface. Figure (b) This shows another view of the warped surface.
This part of the assignment was similar to the final part of the last project. It called for us to create a variety of parts, and then assemble them into a final project. This provided us with great practice on creating parts, as well as with the assembly. This section contains pictures of each part, as well as a brief description of each part.
The first part we had to create was the lens. This was very simple, and consisted of just a simple sketch and protrusion, as well as rounded edges.
The above figures show the next part, the earpiece. This part was also simple to create. It consisted of a simple protrusion, as well as a pattern of the hole command.
The above figures show the next part in this assembly, the microphone. This consisted of another simple protrusion. Once we had that, we had to cut away material from the top surface using just a simple extrusion, removing the material.
This part of the assembly is the antenna. It was made using a revolved protrusion for the top, and a simple protrusion for the rod part. In the top portion, a revolved cut was used to create ridge portion.
This part is the PC board. It was made using another simple protrusion, and the hole command. The edges were created using a full round on the top, and the chamfer command on the bottom.
The keypad, as shown above, was slightly more complex to create. It consisted of another extrusion, and also the mirror command for the buttons. But we had to create a relation between the dimensions of the smaller buttons and the dimensions of the larger. Once this was created, we were able to mirror the button. The smaller buttons were created using a pattern.
The Back Cover was more complex to create. We had to create a protrusion, and then create a shell of it. Then we had to create the screw holes, by protruding them from a plane above the bottom surface. Then we had to insert the holes in the protrusion, then copy and mirror them. You can see all these features in the above figures.
The last part was the Front cover. It was the most complex part to create, consisting of many protrusions and cuts, as you can see in the above figures. The keyholes were created in the final assembly once the keypad was inserted and was sticking through the front cover. This command was very simple to do.
The above figures show the final assembly of the Cell Phone in an unexploded view. This was very simple to constrain and to assemble. Below is the exploded view.
The last thing that we had to do was create a BOM (Bill of Materials) drawing. Pro/E makes this very simple to do in the drawing part of the program. Once the view is inserted, you can create a BOM by using a table and a few other commands. The figure below shows what this looks like.
This assignment required a lot of work, but since it was mainly practice, it was not as difficult to complete. It provided me with the instruction and practice that I need to become a much more efficient user of Pro/E
So in conclusion, I feel I have become much more efficient with using Pro/E because of this assignment. I find it much easier to create parts, and put them into an assembly. I feel I need to look and instructions much less than in previous assignments.
1) R. Toogood, Pro/Engineer Wildfire 3.0 Tutorial. Waltham, MA: ProCAD Books Ltd., 2006.