intro Flashcards
Designers generally use _________ to represent the object which they are designing, and to communicate the design to others.
drawings
the importance in computer-aided design (CAD) of the production of visual images by computer,
computer graphics
a technique where engineering drawings are produced with the assistance of a computer and, as with manual drawing, is only the graphical means of representing a design
Computer-aided drafting (CAD
a process of preparing a drawing of an object on the screen of a computer.
Computer Aided Drafting
The use of CAD process provides enhanced graphics capabilities which allows any designer to:
Conceptualize his ideas
Modify the design very easily
Perform animation
Make design calculations
Use colors, fonts and other aesthetic features
Layout drawings, part drawings, sub-assemblies, assemblies
Aerospace
Process schematics, process plant layout drawings
Chemical
: Mapping, Building drawing, Structural design, Town planning, Interior decorations, Multi-storey complex, Surveying etc.
Civil, Architecture
Circuit layout, Panel design, Control system etc.
Electrical
Schematic diagrams of PCs, ICs etc.
Electronics
Manufacturing plant layout drawings, subassemblies, assemblies
Industrial and Manufacturing
Design of machine elements, CNC machine tools, Robots etc.
- Mechanical:
: Kinematics, Hydraulics, Steering etc.
- Automotive
The implementation of the CAD system provides variety of benefits to the industries in design and production as given below:
Improved productivity in drafting
Shorter preparation time for drawing
Reduced man power requirement
Customer modifications in drawing are easier
More efficient operation in drafting
Low wastage in drafting
Minimized transcription errors in drawing
Improved accuracy of drawing
Assistance in preparation of documentation
Better designs can be evolved
Revisions are possible
Colors can be used to customize the product
Production of orthographic projections with dimensions and tolerances
Hatching of all sections with different filling patterns
Preparation of assembly or sub assembly drawings
Preparation of part list
Machining and tolerance symbols at the required surfaces
Hydraulic and pneumatic circuit diagrams with symbols
Printing can be done to any scale
the representation of an object in the single-view format which shows two of the three object dimensions or the multi-view format where each view reveals two dimensions.
Two-dimensional (2D) computer drawing
the database includes just two values for each represented coordinate of the object. It can also be a pictorial representation if the database contains X, Y coordinates only.
Two-dimensional (2D) computer drawing
is the process of creating three dimensional models using professional CAD software. This type of drafting is used by specialists in many industries, including architecture, engineering, and construction
Three-dimensional (3D) computer drawing
INPUT DEVICE
Mouse
Keyboard
Joystick
Scanner
Digitizer
Scanner
OUTPUT DEVICE
Monitor
Plotter
Printers
Storage
The purpose of this unit is to produce the results of the software.
OUTPUT DEVICE
an interpreter which allows the user to perform specific type of application related to CAD software
Software
There are a number of 2D and 3D drafting software packages available in the market
Solidworks
Inventor
Revit
AutoCAD
Civil 3D
Micro-station
Catia
Siemens NX
is a very popular software package that provides computer aided design and drafting (CADD) capabilities for micro computers.
AutoCAD
a comprehensive software application that facilitates almost all varieties of 2D drawing, such as electrical, mechanical, plumbing, Air-conditioning, architectural etc
AutoCAD
accepted as the industry standard and it is preferred by a large community of CAD users in the world.
AutoCAD
available for a variety of computer systems, majority of AutoCAD implementations are available on IBM or compatible personal computers with Windows operating system.
AutoCAD
can be used with many engineering design programmes and can be used separately if needed.
AutoCAD
covers the major portion of the screen, User can draw the objects and use the commands
Drawing Area
at the bottom of the drawing area has the command prompt where we can enter the commands. It also display the subsequent prompt sequences and the messages
Command Window
hold all the commands and functions that are the heart of the AutoCAD.
Pull-down Menus
This menu includes file new, file open, file save, print, copy, paste etc.
file
This menu provides commands from interfacing with the other windows application.
edit
Shows the most commonly used display commands. iv. Insert: Lets you to insert various blocks.
views
You can change fonts.
format
Various tools available which support drawing.
tool
Lets you to select various draw commands.
draw
It provides dimension to the existing drawing.
dimension
Provision of changes in the existing drawing.
modify
: It has on the line help for AutoCAD. The entire manual is contained in this context sensitive windows based help system.
help
operated by using command tools, tool bars and a series of prompts
AutoCAD commands
