Computer Graphics
Drawing with the use of a computer
What is computer graphics?
A description of an object made up of two or more parts
What is an assembly drawing?
Like a photograph; it shows an object as it appears to the eye, but it is not satisfactory for showing complex forms and shapes.
What is a pictorial drawing?
Made up of alternate long and short dashes. Indicates the center of an object or part of an object.
What are centerlines?
Indicate invisible edges or contours
What are hidden lines?
Where a computer is used in the design of a part or product
What is computer aided design (CAD)?
Obtained by cutting away part of an objects to show the shape and construction at the cutting plane
What is a sectional view drawing?
Like an isometric view, except two of the three drawing axes are always at right angles to each other
What is an oblique drawing?
A light solid line, broken at the midpoint for insertion of measurement indications, and having opposite pointing arrowheads at each end to show origin and termination of a measurement
What are dimension lines?
Used for all lines on the drawing representing visible lines on the object
What are outline or visible lines?
Where a computer is used in the design and drafting process
What is computer aided design drafting (CADD)?
A description of a single part, describing bylines, notes, and symbols the specifications for size, shape, material, and methods of manufacture to be used in making the part
What is detail drawing?
What is an exploded view drawing?
Indicate the exposed surfaces of an object in a sectional view.
What are sectioning lines?
Indicate that a portion of the object is not shown on the drawing
What are break lines?
Where a computer is used in the manufacturing of a part or product
What is computer aided manufacturing (CAM)?
Includes all necessary information for a part or an assembly in the final installed position in the aircraft.
What is an installation drawing?
Uses a combination of the views of an orthographic projection and tilts the object forward so portions of all three views can be seen in one view
What is an isometric drawing?
Indicate the alternate position of parts of the object or the relative position of a missing part.
What are phantom lines?
Used to indicate the stitching or sewing lines on an article and consists of a series of very short dashes, approximately half the length of dash or hidden lines, evenly spaced.
What are stitch lines?
Where a computer is used in the engineering of a part or product
What is computer aided engineering (CAE)?
Must give information such as size and shape of the object and all its parts, specifications for material to be used, how the material is to be finished, how the parts are to be assembled, and any other information essential to making an assembling the object.
What are drawings?
Shows an object as it appears to an observer
What is perspective drawing?
A light solid line, broken at the midpoint for insertion of measurement indications, and having opposite pointing arrowheads at each end to show origin and termination of a measurement
What are dimension lines?
Indicates the plane where a sectional view of the object is taken
What are cutting plane lines?