EGN1111C
Midterm term review
Midterm term review
Fichier Détails
| Cartes-fiches | 92 |
|---|---|
| Langue | English |
| Catégorie | Electrotechnique |
| Niveau | Université |
| Crée / Actualisé | 10.10.2019 / 10.10.2019 |
| Lien de web |
https://card2brain.ch/box/20191010_egn1111c
|
| Intégrer |
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What is Fit?
Amount of tightness or looseness between two mating parts.
Maximum Material Condition (MMC) is what?
The upper limits for external parts and lower limits for internal parts. Aka, allowance.
Least Material Condition (LMC) is:
The lowest limit for external parts and the upper limit for internal parts.
Geometric Demensioned and tolerances are used because of ___________________.
Universal mass production of parts
_____________ _____________ limites are given both + and - limits.
Bilateral Tolerance
___________ ___________ limits are given only one way, either upper or lower limit will have a value.
Unilateral Tolerance
What is clearance fit?
When there's always space between mating parts.
What is interference fit?
No space between mating parts. Also called a press fit.
What is transition fit?
Mating parts have both clearance and interference fits.
Which centerlines are the primary centerlines?
The centerlines that are in the center of the view.
Which type of hole needs a depth dimension?
Blind hole
What is block dimensioning?
A page tolerance that is used as a general note not covered by some other tolerancing type.
What are continued/chained dimensions?
Multiple dimensions placed end-to-end
What are baseline dimensions?
Multiple dimensions with offset dimension lines measured from the same location.
What are factors to consider when planning dimensions of mating parts?
The length of time they are to be engaged, speed at which they move, load they support, type of lubricant used, average tempurature they will operate in, humidity level, type of material, lifespan, capabilities of machinists operating the tool, and cost. (Length, speed, load, type, tempurature, humidity, material, lifespan, machinist, and cost)
Working Drawing
Complete set of plans so product can be built completely without any other information
Why working drawings exist?
New product, redesign of an existing product, system or service.
Universal Standards are set by these organizations:
ANSE, ASME, ISO
These are all parts of a working drawing:
Shape description (views), size description (dimensions), and miscellaneous information (notes).
Orthographic Projection
Drawing of a 3D product on a flat piece of paper by unfolding it's 6 sides and drawing the views perpendicular to your sight.
Prictoral Drawing
One view, with 3 sides. 3D image often in the upper right hand corner.
What kind of type lettering do you use?
Single stroke GOTHIC, inclined or verticle, and in one style only.
Text Characteristics
1/8", thick and black, words spaced by eye, 1/8" between rows of words.
Horizontal or inclined fraction bars? open 4 or no open 4?
Horizonal fraction bars. No open 4.
Sketching
A quick way of expressing an idea, drawn in PROPORTION but not always to scale.
Orthographic Views
Front, top and right side. Normally with 3 views but with a minimum of 2 views. No maximum view.
What view do you draw first? Which view is the entire drawing based on?
The drawing with the best shape description, fewest hidden lines, or position one is most accustomed to seeing.
Can you place views out of alignment to the others?
NEVER. Every view should line up with the other ones.
Basic overall dimensions of a drawing:
Height, width, and depth.
What is the front views' dimension?
Width and height
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