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HW3 Machining and Psychological Safety
Terms in this set (27)
A group that has "Psychological Safety:"
Is a safe place for interpersonal risk taking.
Is a group that does not have personal attacks, belittling comments, or attempts to humiliate each other.
The "Common Knowledge Effect" danger is:
The group only discusses things that everyone already agrees with.
The group does not get to hear about diverse perceptions or ideas.
There is a measurable difference in brain activity and ability when you are working in a Psychologically Safe group and when you are not.
Which method(s) are not Brainstorming tools?
Refine, Evaluate, and Improve
Brainstorming Tools include:
Select all that a group facilitator is responsible for:
Recording action items decided upon and recording progress toward their completion
Arguments are fine during a group meeting as long as people are not acting disrespectfully or unprofessional.
Which materials cannot be machined:
Things that are especially brittle such as many ceramics and glass.
What is a ball mill
has rounded end
Bull Nose Mill
has a flat end
Select all that apply. A roughing cut:
Is done at low cutting speeds
Has a large feed and depth of cut
Removes large amounts of material
In a turning operation, select all that apply:
A rotating workpiece is moved toward a stationary cutting tool.
The cutting operation will have circular symmetry.
It is done on a machine called a Lathe
on the edge
A single point cutting tool to remove material from the inside of an existing hole:
When the rotating end mill deflection is into the workpart, then you are doing...
Using and End Mill
B and D
no sharp corners
nothing over rounded
Using Ball Mill
Select all of the following that are not possible to make using a conventional Mill machine?
Reaming is used for which of the following:
To improve the diameter tolerance of a hole.
To improve the surface finish inside a hole.
A finishing cut, as opposed to a roughing cut, is done:
At a shallower depth of cut
At a smaller feed rate
At higher rpm
Which are true about Lubricants for cutting?
They reduce the temperature of the cutting tool, but not as much as other cutting fluids.
They are comprised almost entirely of hydrocarbons with some additives.
They should be used at lower cutting speeds than other types of cutting fluids.
They make cutting surfaces smoother.
They make it easier for cutting chips to not to stick to the cutting tool.
A new lathe insert is used on a 100 mm diameter steel workpart, with the lathe going at 300 rpm the insert lasts about 321 min, but at a 100 rpm it lasts for 2010 min. What material could you assume the lathe insert is made out of?
A Lathe rotating at $200 \rm\ rpm$ is used to reduce the diameter of an $14 \rm\ cm$ long section of stock metal rod from a diameter of $101 \rm\ mm$ to $98 \rm\ mm$ at a feed rate of $3.1 \rm\ mm/rev$. The force measured at the tool post was $3400 \rm\ N$ down and $1900 \rm\ N$ pulling the tool toward the workpart. What is the material removal rate?
A Lathe rotating at $100 \rm\ rpm$ is used to reduce the diameter of an $9 \rm\ cm$ long section of stock metal rod from a diameter of $100 \rm\ mm$ to $96 \rm\ mm$ at a feed rate of $3.1 \rm\ mm/rev$. The force measured at the tool post was $3500 \rm\ N$ down and $1800 \rm\ N$ pulling the tool toward the workpart. How long does it take to cut the $9 \rm\ cm$ length?
A Lathe rotating at is used to reduce the diameter of an long section of stock metal rod from a diameter of to at a feed rate of . The force measured at the tool post was down and pulling the tool toward the workpart. What is the specific energy of this material?
In a turning operation, an aluminum workpart is reduced from a radius of to a radius of . If the lathe is set at the tool edge lasts just long enough to cut taking for each. If the lathe is slowed to that speed () the tool can now make it through an amazing , but it takes longer per part. If you then ran the lathe at how many parts could you make before having to replace the cutting edge?