Drafting Finals Vocabulary
Terms
undefined, object
copy deck
- 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