|
Computer-aided design (CAD) is the use of computer
technology to aid in the design and especially the drafting
of a part or product. It is both a visual (or drawing) and
symbol-based method of communications whose conventions are
particular to a specific technical field.
Drafting can be done in two dimensions ("2D") and three
dimensions ("3D").
Drafting is the integral communications of technical
drawings and is the Industrial arts sub-discipline which
underlies all involved technical endeavors. In representing
complex, three-dimensional objects in two-dimensional
drawings, these objects have traditionally been represented
by three projected views at right angles.
Current CAD software packages range from 2D vector base
drafting systems to 3D solid and surface modellers. Modern
CAD packages can also frequently allow rotations in three
dimensions, allowing viewing of a designed object from any
desired angle, even from the inside looking out. Some CAD
software is capable of dynamic mathematic modeling, in which
case it may be marketed as CADD — Computer Aided Design and
Drafting.
CAD is used in the design of tools and machinery used in the
manufacture of components, and in the drafting and design of
all types of buildings, from small residential types
(houses) to the largest commercial and industrial structures
(hospitals and factories).
CAD is mainly used for detailed engineering of 3D models
and/or 2D drawings of physical components, but it is also
used throughout the engineering process from conceptual
design and layout of products, through strength and dynamic
analysis of assemblies to definition of manufacturing
methods of components.
CAD has become an especially important technology, within
the scope of Computer Aided technologies, with benefits such
as lower product development costs and a greatly shortened
design cycle. CAD enables designers to lay out and develop
work on screen, print it out and save it for future editing,
saving time on their drawings.
|
