Please note that this site is no longer being updated and is for instructional use only. Please go through the tutorials and use the following information for reference only. The homework is not current and is not expected to be turned in by students.
M. A. S.
|The sooner a mechanical designer can select a manufacturing process for a new component, the sooner the design can be tailored for the benefits and restrictions that come with the process. The Manufacturing Analysis Service (MAS) is a concept level process and material selector, that gives a designer some direction for process selection based on answering simple questions about the component. While the part in question is still in the 'back of the envelope' stage, intelligent decisions can be made about which manufacturing process should be used.|
|The MAS is located at http://cybercut.berkeley.edu/mas2/
The MAS may take a few minutes to download on a slow modem connection.
GO THROUGH THE FIRST TWO TUTORIALS!
Send MAS technical questions to Dr.
Charles Smith at UC Berkeley, (510)643-9486.
Look at the help page for the shape attribute before selecting your part's shape!
|For this assignment write a critical review of your experience using
the MAS software. Describe what aspects of the software were easy
or hard to use, what parts were confusing, what functions seemed
to work well and what functions did not work as you expected. Include
a description of what design decisions you made that seemed to have the
greatest effect on the number of suitable processes. You should
have at least one written page by the time your done with all of
the questions in this assignment!
Use the following questions to guide your use of the MAS.
#1 Consider the handle of the three hole punch passed around the class (pictures are also at this bottom of this page). (If you want to see the handle first hand, its on the bookcase in the middle of 2117 Etcheverry Hall in Berkeley)
#1a Prototyping: Assume you only need a few copies of the part, with loose tolerances, and you need to make some reasonably cheap models that will not be placed under an operating load. Use the MAS to select one or more processes that can do this. Include a screenshot of your final results (see notes on printing MAS screens)
#1b Manufacturing: The prototype has been approved and you now need to ramp up to full scale production. The first batch will be 50,000 handles, and they will now be subject to loading. Use the MAS to select a suitable manufacturing process and a suitable material. Use the "Results Survey" mode to combine the two searches and find the best combination.
What processes have dissappeared from the prototyping list? What processes have been added? Why? Include screenshots of the process search, material search, and results survey.
#2 Select a consumer item lying around your home (pencil holder, computer case, copper pipe, etc) and use the MAS to derive a manufacutring process that would be suitable for the part, in whatever quantity you deem appropriate.
#3 Pick a process from the list below that you don't know anything
about. Use the MAS online process
descriptions - and any other references - to find a product in your
home that could be made with the assigned process.
(Hole punch handle pictures are below)
|Here's the front of the handle. Note that the main shaft goes through the bottom section of the handle.|
|From the left side, we can clearly see the hole in the bottom of the handle, and get a better idea that the front surface of the handle is curvy.|
|The right side view.|
|If you look very closely at this back view, you see that there is an addition small hole, perpendicular to the main shaft. It goes completely through the bottom of the handle, and holds a pin that affixs the handle to the shaft.|