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Reverse Engineering, Ethics, and other issues in Design. Necessary qualities for successful completion of project: Curiosity, eagerness to take things apart, willingness to learn from mistakes, interest to work in a team Thinking is not an option. Objective. Dissecting a product
Necessary qualities for successful
completion of project:
Curiosity, eagerness to take things apart, willingness to learn from mistakes, interest to work in a team
Thinking is not an option
Problem with GM and Ford even though quality is good
Recent GM Promotions
Now let us consider some common household items, dissect them and then try to design a similar product.
Following steps are involved to study the product:
By now, you are working in a team (smooth or rough?)
Working properly in a team is essential to the success of the project
Next few slides are presented to help functioning properly in a team
“If you can’t operate as a team player, no matter how valuable you’ve been, you really do not belong at GE”
past CEO, GE
Since this may be the first course in your engineering curriculum, be aware of the potential problems of working a group and try to avoid them
in industry to understand the product of competitors
reasons such as reverse engineering of legacy
parts for an Army project (Mechanical
Engineering Design, pp 12-15, 2004)
Now that you have some guidelines for working in a group successfully, proceed with dissection of a vacuum cleaner
required power = mass flow rate * change in pressure
Now change of duct size and many other factors would
govern the required pressure increase by the impeller.
I want to conclude this part of the lecture with a note that just designing and manufacturing a part or a component is not enough. Ultimately you have to interact with other people whether it is personnel within your own company or outside your company. You may work for a company or agency which either sells a product or buys a product You need to be aware of a very important issue – ETHICS(seems to be the primary issue in Illinois gubernatorial election)
PreambleEngineering is an important and learned profession. As members of this profession, engineers are expected to exhibit the highest standards of honesty and integrity. Engineering has a direct and vital impact on the quality of life for all people. Accordingly, the services provided by engineers require honesty, impartiality, fairness, and equity, and must be dedicated to the protection of the public health, safety, and welfare. Engineers must perform under a standard of professional behavior that requires adherence to the highest principles of ethical conduct.
Engineers, in the fulfillment of their professional duties, shall:
1. Hold paramount the safety, health and welfare of the public.
2. Perform services only in areas of their competence.
3. Issue public statements only in an objective and truthful manner.
4. Act for each employer or client as faithful agents or trustees.
5. Avoid deceptive acts.
6. Conduct themselves honorably, responsibly, ethically, and lawfully so as to enhance the honor, reputation, and usefulness of the profession.
Vibration studies is a big part in Sports e.g. golf, tennis, baseball etc (e.g. new golf clubs are designed to hit the ball further).
Unlike golf, major league baseball doe not permit changing the traditional wooden bat. However, that does not stop players from trying illegally changing the bats say by corking.
Bending Modes and sweet spot
Hoop Modes are important
for hollow aluminum or composite
bats because of the trampoline effect
Corked bats do not change the distance traveled by the ball
Momentum of bat hitting the ball is about the same (more velocity but less mass)
Let us consider vibration of aluminum and wooden
How about other sports? – Golf, Tennis, Football, Yacht, etc)
Steel vs. GraphiteShafts:
Graphite shafts transmit fewer vibrations up the shaft to the golfer's hands than do steel shafts
Graphite shafts are lighter than steel shafts
Shaft flex – related to stiffness