Fundamentals of CAD / CAM

CAD
Computer Aided Design is the process of creating, modifying and refining using digital computers which accepts data in the binary form.
Example:
stress-strain analysis,
Heat transfer problems,
 Von mises stress.

The person one who enters command to the system to perform specific operation is called as programmer.
As the person enters commands to the system, the CPU calculates required calculations with the help of automatic logic unit.

After the calculation it is represented on the screen through CRT. in inorder to perform CAD operations, it is essential to have some hardware and softwares.
A software which allows programmer to give command and represent it as an object on the screen is called as CAD package.
Example: Catia, AutoCAD, Pro-E, Solidworks, Solid edge, Ansys, Hypermesh.

CAM
Computer Aided Manufacturing makes use of digital computers to make process planning, production scheduling, routing, MRP-1, MRP-2, floor control and etc.,

CAM applications are of 2 types as follows:
(a) Process monitoring and
(b) Controlling
In this, computers are used directly with the manufacturing or production location.

Process monitoring: It is a single way communication system where information flows takes place from production location to the monitoring location.
Here, even though monitoring is done with the computer but controlling actions taken by the human being.

Process controlling: it is a two way communication channel where information flows takes place from manufacturing space to monitoring space. but, one more element is provided to take control action to the process if any error occurs.


Functions of CAM:
Process planning,
Production scheduling,
Bill of material
Manufacturing resource planning (MRP-1),
Material requirement planning (MRP-2),
NC control,
CNC control,
DNC control,
Record file control,
System aided applications (SAP),
Routing.