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71 Cards in this Set

  • Front
  • Back
Acute Angle
less than 90 degrees
Alphabet of Lines
different lines used in drawings
Angle
when 2 straigh lines meet a point
Circumference
perimeter around an object
compass
tool used to create a circle
Drafting Film
a film technical drawings are made on.
Erasing Shields
Used to erase and protect lines you dont want erased
Inclined
slanted
india ink
ink used in technical drawings
opaque
dark
obtuse angle
more than 90 degrees
protractor
used to measure angles
symmertrical
mirriored around the axis
vellumn
transparent tracing paper
tranparent
clear
Scales
tools used to make measurements
right angle
90 degree angle
vertex
the point wherre the lines meet in an angle
T-Square
a ruler the makes a true edge from lining up witht he drafting edge
First angle projection
a form of projecttion used in europe where the fornt view is on top of the top view
Front view
shows the front of the object
Horizontal Plane
side to side plane of orthoographic projection
Implemtentation
drawing an object that has visualized
Multiview Drawing
an exact representation of a 3d object
Negative cylinder
a hole, nothing, but has a "size"
Normal Views
front, top., and right side views of a drawing
Orthographic projection
method of representing the exact form of an object in 2 or more views on planes usually at right anlges
Pictorial Plane
a drawing that shows an object as it appears to the hhumna eye
profile plane
the side view of an orthgraphic prjecttion
right side view
shows dpth and hight
solid model
a 3d model that has the mas properties
spherical
perfectly round in 3d
third angle projectiuon
used in North America top view above the front view
top view
shows the top of the object, shows exact shape
vertical palne
vertical view of an O.P.
Visualiztion
ability to see the object in your head before oyu draw it
bisect
divide into 2 equal parts
chord
a striahg line between2 points on a circle
circumscirbed
qhen a square fully incloses a cirlce
diameter
the distance through the center point to the other side of the circle
entities
geometric elements from which you develop a drawing
geometric construction
drawins made of individual lines and points in proper relationship
geometry
study of size and shape
hypotenuse
oppsosite side of a 90 degree angle
inscribed
when all shape's corners are tangent to the circle
intersect
the point at which 2 lines cross
object snap
functions on ACAD that help find the exact midpoint
ogee curve
a reserve curve that looks like "s"
parallel
side by side, never crosing
perpendicular
when 2 lines cross at a 90 degree angle
polygon
a closed figure
regular polygon
when evey side of the polygon is equal
tangent
when a line touches a circle or arc only once
aligned system
where the dimensions (measurement) are placed on the dimension line
assembly drawing
a drawing, usually 3D, in which all the parts of a machine are shown together in relative positions
basic hole system
a system of specifying dimensions and tolerances of fitting cylindrical parts in which designs size of hte hole is hte basic size and the allowance is applied tot he shaft
Basic Shaft system
the design size of the shaft os the bsic size and allowance is applied to the hole
bilateral tolerances
a tolerance that allows a variation in both directions from a design size
datums
a point, line, or surface, that is assumed to be exact
detail drawing
a drawing or a single part that has all the dimensions and thinggs needed to make the part
Dimension Line
shows where a measurement begins and ends
dimensioning
name for the size description of an object
dul dimension system
size given in both decimal inch and millimeters
extension lines
extend the lines of the dimension line
finish marks
surface texture symbol that shows that a surface os to be finished
geometric dimensioning and tolerancing
the specifics of material, size, shape, and charateristics of an object
leader
drawn form the circle or arc with as slant and an arrow that tells the measure of the object
outline view
a view that shows the shape of an object's flat surfaces
tolerance
the amount of a machine part thats allowed to vary from absolute measurements
unidirectional system
where all dimensions read from bottom to top no matter where they appear on the drwawing
unilateral tolerance
a tolerance that allws variation on only one side of the design part