6. 6
General Information
The figures shown in this portfolio were made by Alex Haesche as part of the distribution requirements
at Walla Walla University. Most figures were created with Creo Parametric, other figures may have been
made in other software: it is noted where applicable.
Outside Work
As well as the work presented in this portfolio, I have successfully completed tutorials in the following
programs:
Autodesk Inventor Professional 2015
o Packaged Tutorials
o Sheet Metal Parts
o Sheet Metal Parts 2
o Plastic Parts and Features
o Equation Curves
o V-Belts Connections
o Disc Cams
o Compression Springs
o Substitute Level of Detail Representations
o Splines and Surfaces
o Shafts
o General Mold Workflow
o Family Mold Design
o Core and Cavity Considerations
o Frame Analysis
o Frame Analysis Results
o Modal Type of Frame Analysis
Creo Parametric 2.0
o Introduction to Creo Parametric 2.0 - Fundamentals
o Introduction to Creo Parametric 2.0 - Productivity Tools
o Introduction to Creo Simulate 2.0
o Mechanism Design using Creo Parametric 2.0
o Mechanism Simulation using Creo Parametric 2.0
o Update to Creo Parametric from Creo Elements/Pro 5.0
7. 7
Advanced CAD
Shoulder Screw with Threads
This screw was made to demonstrate how to use a helical sweep.
While a helical sweep is the incorrect way to make threads, our professor
thought it would be a good learning opportunity since everyone was
familiar with threads.
Figure 2 shows how this part was started: with a
sketch then revolve.
After revolving and completing the head design, the hard part of making the threads begun. The most
difficult part of making the thread was setting up the sweep profile correctly. Some of my classmates
were making the threads using a triangle with a foot so that the threads would have flats between each
other. I figured out how to make threads without the foot on the triangle. You can see the sweep
section in Figure 3.
Figure 1 Shoulder Screw
Figure 2 Shoulder Screw Initial Sketch
Figure 3 Shoulder Screw Thread Profile
8. 8
Spinning gears
I made this part in such a way that I
could print it on the school’s Fortus
200mc 3D printer.
I did not make the gears myself, but
rather was supplied with a universal
gear file. With this file I was able to
define a few things (such as diameter,
teeth, etc.) and the file would update as
appropriate.
This example demonstrates proper
dimensioning of part’s height and
specific placement of a part in an
assembly, along with text placement.
This assembly is set up with collision on, this means that one gear can be rotated, and the other will also
rotate. This was necessary so that the print would be able to move like the CAD model does.
Figure 4 Personalized Rotating Gears
9. 9
Torah Project
My professor thought it would be a good idea to show us the wrong way to make parts from an image.
The method he had us use was to make a stock part and texture it with an image file. After that was
completed, we were to trace along the edge that we wanted, and to revolve that, making the shape we
wanted. In this case it was handles for a Torah, seen below.
Figure 5 Torah Handles Made From Pictures
10. 10
Hatch
The hatch, as it was called in our textbook, was difficult due to its complexity. As seen in Figure 7, a lot
went into making all the features in the correct
location.
Figure 6 Hatch Part
Figure 7 Hatch Sketch
11. 11
Hatch – Geometric Dimensioning and Tolerancing
Figure 8 shows the dimensions and tolerances that the textbook had for us to add.
Figure 8 GDT of Hatch Model
12. 12
Key Technologies Camera Mount
Key Tech is right down the road from Walla Walla University, at times they will come to us
for help, or just to off load some of their work onto us. The next
series of pictures is from a problem they had with a camera
mount.
Key Technology wanted a camera to watch how food was
being processed with their machine, but the image was unsteady
at the frequencies the system was being driven. Their task for
us was to redesign their camera mount. Given their
requirements, all we were allowed to do was change the
length of the arms and their attach points, and the position
of the camera.
Figure 9 is my final result; the result that most everyone
in class came up with.
Figure 10 Mass Analysis of Camera Mount
Figure 10 shows the part we were given, after we idealized the camera as a cylinder and set mass
properties.
Figure 9 Camera Mount
13. 13
Figure 11 shows how the system
reacts at the driven frequency. For
this system is it 43 Hz.
Figure 12 shows the
camera mount
transmissibility for the
original design, worst-,
and best-case scenario.
This plot was made in
MATLAB, the zeta values
were calculated in Creo
Parametric.
The x- and y- labels are
using the LaTeX
interpreter. This is so that
the subscripts and
fractions turn out the way
I wanted them to.
Figure 11 Camera Mount Displacement at 43Hz
Figure 12 Transmissibility Plot of Various Mounts
14. 14
Finite Element Methods
I have used ANSYS in for heat transfer and load analysis. The following are a few pictures of work I have
done for class.
Figure 13 Elemental Analysis of Heat through Heatsink
In Figure 13 heat transfer from the bottom edge of the block can be seen decreasing towards the top.
15. 15
Figure 14 shows setting up nodes for this model of a
crane.
Figure 15 shows the placing of loads.
Figure 16 shows the deflection caused by the loads.
Figure 17 shows how stress develops around a circular
hole. This is a simplified model, thanks to the part being
symmetrical.
Figure 14 Placement of Nodes on Crane
Figure 15 Application of Loads
Figure 16 Displacement of Crane Members
Figure 17 Hole Stress
16. 16
Intro to CAD
For the final project of Intro to CAD, we were
to replicate a physical object in Pro E Wildfire.
This is an example of the parts that my team
was working on. This is the handle and base
of a masking tape dispenser.
Figure 18 Tape Dispenser
17. 17
Kinematics
Four-bar Assembly
This assembly was made to
demonstrate how a four-bar works.
The blue line shows the coupler curve;
the path of the right most hole.
The Figure 20 shows the same assembly, but with the input arm rotated. This demonstrates how the
right most hole follows the coupler curve when the input angle changes.
Along with making our four-bar in Creo Parametric, we made it in MATLAB, this allowed us to see how
the equations worked.
Figure 19 Four-Bar Assembly
Figure 20 Four-Bar Assembly Adjusted
18. 18
Figure 21 shows the same four-
bar as Figure 19, but with the
paths of all the joints, and an
instant center of two points.
I have a script that shows
Figure 21 animated, the input
angle changes from 60°, where
it starts, to about 400°.
Figure 22 shows the four-bar,
made in AutoCAD, with
distances to instant centers of
velocity labeled.
Figure 22 Four-Bar with Instant Centers Labeled
Figure 21 Four-Bar with Curves and Instant Center
19. 19
Cam
The cam project was a long one that required multiple programs. First I had to create a cam in AutoCAD,
then export the drawing to CADKEY. Once in CADKEY, and with some finagling, I was able to save the
points as a file type that Creo Parametric would accept for use in a sketch. After making the sketch, I was
able to extrude the resulting shape as the cam that I had created in AutoCAD.
Figure 23 shows the cam with circles at interesting points.
Our assignment with this was to print it off, and draw and
measure pressure angles by hand. The circles are points of
interest.
Figure 24 shows the same cam made in
MATLAB.
Figure 23 Cam in AutoCAD
Figure 24 Cam in MATLAB
20. 20
Figure 25 shows the pressure
angles at different cam angles,
this was used to verify my
work with Figure 23.
Figure 26 shows the
displacement, velocity, and
acceleration of the cam at
different angles. The blue
line is the MATLAB
calculated results using the
equations from my
textbook, the red dashed
lines are the results from
Creo Parametric.
Figure 25 Pressure Angle vs Cam Rotation
Figure 26 Position, Velocity, and Acceleration vs Cam Rotation
21. 21
Figure 27 shows the final results of the
CAD work with the cam. I have a mpg
file of the cam rotating and the follower
moving along with the rotation.
Figure 27 Cam and Follower in Creo
22. 22
Machine Element Design Lab
In class we were presented with a question: is it time to replace this pump? We were told at what rpm it
spins at, and what its output is supposed to be. Our task was to recreate the gears in AutoCAD and
decide if the output was close enough to the advertised value.
Figure 28 shows measuring of the volume between the gears, one step in my analysis.
Figure 28 Gears Made in AutoCAD
Figure 29 shows a step in the creation of gears. I
made a quarter of the gears, and rotated the
results three times.
Figure 29 Process of Making a Gear
23. 23
Manufacturing Systems Engineering
The quarter long project we were tasked with was to make an assembly line for a yo-yo. This included
making a yo-yo in a CNC lathe, which required learning G-code, along with designing and assembling a
series of mechanisms for putting together the yo-yo.
My team’s design incorporated a twelve stage turret, which would hold the yo-yos in place while
mechanisms would place O-rings, a bearing, the other half of the yo-yo, and finally a set screw to hold it
all together. I volunteered to make the yo-yo holder, seen in Figure 30.
Figure 30 Yo-yo Holder
24. 24
Vibrations
To demonstrate how vibrations affect displacement,
we built a tower and vibrated the base. We compared
the CAD results with the measured results we got
from the lab. Figure 31 shows a model of our tower
Figure 31 Tower
25. 25
Figure 32 shows the different displacement styles and the first four modal frequencies.
Figure 32 Four-bar Tower Modal Analysis
26. 26
3DConcpet Work
While I was at WWU, I worked for 3DConcepts, a business run by the engineering department. What this
business did was reach out to the community for jobs that required a 3D printer.
One Job I had was to recreate an oven knob for an old stove. The client gave me the knob to recreate;
these are the results.
Figure 33 Oven Knob – Front Detail
Figure 34 Oven Knob – Back Detail
