EGN1111C

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This flashcard set covers university-level electrical engineering topics, focusing on dimensions, views, symbols, and types of fits for mating parts. It delves into technical details like baseline and continued dimensions, unilateral and bilateral tolerances, and the importance of centerlines and depth dimensions. Engineers and designers will find this set particularly useful for understanding the precise specifications and standards required in technical drawings and product design.

Cartes-fiches

Utilisateurs

Langue

Anglais

Catégorie

Electrotechnique

Niveau

Université

Créé / Mis à jour

10.10.2019 / 10.10.2019

Fichiers de cartes similaires

What are the dimensions for the cone?

Diameter for base and height

What are tolerances?

Total amount of variation permitted from the design size. It is the largest limit minus the smallest limit.

What is the design size? E.i; 2 X 4

The nominal size

What is allowance?

The tightest fit between two parts.

What are limits?

The largest and smallest a part or product is allowed to be.

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

Commandes clavier:

= tourner,

= avant/arrière,

= faire défiler

Complete set of plans so product can be built completely without any other information

Why working drawings exist?

Commandes clavier:

= tourner,

= avant/arrière,

= faire défiler

New product, redesign of an existing product, system or service.

Universal Standards are set by these organizations:

Commandes clavier:

= tourner,

= avant/arrière,

= faire défiler

ANSE, ASME, ISO

These are all parts of a working drawing:

Commandes clavier:

= tourner,

= avant/arrière,

= faire défiler

Shape description (views), size description (dimensions), and miscellaneous information (notes).

Orthographic Projection

Commandes clavier:

= tourner,

= avant/arrière,

= faire défiler

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

Commandes clavier:

= tourner,

= avant/arrière,

= faire défiler

One view, with 3 sides. 3D image often in the upper right hand corner.

What kind of type lettering do you use?

Commandes clavier:

= tourner,

= avant/arrière,

= faire défiler

Single stroke GOTHIC, inclined or verticle, and in one style only.

Text Characteristics

Commandes clavier:

= tourner,

= avant/arrière,

= faire défiler

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?

Commandes clavier:

= tourner,

= avant/arrière,

= faire défiler

Horizonal fraction bars. No open 4.

Sketching

Keyboard commands:

= turn,

= for-/backward,

= scroll

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

Top views' dimensions:

Width and depth

Right side's views' dimensions:

Height and depth

Line type of an object line:

Thick and black

Line type of a hidden line:

Dashed with a medium thickness, black line.

Line type of a center line:

Long-Short-Long-etc. dashed, thin and black line.

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Flashcards

You ____________ lead on paper.

Burnish

You _____________ lead on sandpaper.

Dress

Circle viewed at an angle.

Ellipse

A flat surface

Plane

The edge of a plane viewed horizontally.

Line

Where two lines intersect

Point

Edge view of two intersecting planes

Angle

Point of intersection

Vertex

A shape that has been cut parallel to the base.

Fustrum

Shape cut at an angle to the base

Truncated

What symbol is this?

Parallel

What symbol is this?

Square foot

What symbol is this?

Diameter

What symbol is this?

Perpendicular

What symbol is this?

Angle

What symbol is this?

Angle

What symbol is this?

Equals

What symbol is this?

Radius

What symbol is this?

Degree

What symbol is this?

Depth

What symbol is this?

Counterbore

What symbol is this?

Countersink

What symbol is this?

Centerline

What symbol is this?

Finish mark placed on the edgeview of a surface

Never cross a _____________ line.

Dimension

What what is the distance to the first dimension from the object line? Second, third, forth, etc. dimensions?

3/8 of an inch then an additional 1/4 per extra dimension.

No dimensions on views except for:

Radius

Leaderlines can be at any length and any angle except for which angles?

90 and 180

Keep dimensions between views unless:

They are hitting other dimension lines, there is no room for them between views, you get a better description of the feature by dimensioning from the outside, or the only way to dimension between views is to a hidden line.

Used to transfer depth dimensions between top and right side views.

Mitre line

Dimensions used for mass production products

Limit

_______________ is the system of writing dimension numbers where verticle dimensions are written horizontally with all other dimensions.

Unidirectional

____________ is the system for writing verticle dimension numbers with the orientation of the object line.

Aligned

What are the two types of dimensions?

Size and Location

Used when a surface, edge, or center line is determined to be true and accurate. It is when a single surface, edge, or line is to be used as the starting point measurement.

Datum

Dimensions of a circle

Diameter

Dimensions of an arc

Radius

Dimensions of a rectangular prism.

Height, width, and depth

Dimensions of angles

Degree or limits

What are dimensions for the sokid cylinder?

Diameter and length

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