CNC Technology
CNC Technology
Numerical Control (NC) is a software-based machine tool control technique developed at Massachusetts Institute of Technology (MIT) in early 1960s. It has now evolved into a mature technology known as Computer Numerical Control (CNC).

Although major applications of CNC even today continue to be in machining, it finds applications in other processes such as sheet metal working, non-traditional machining and inspection. Robots and Rapid Prototyping machines are also CNC controlled. In fact,any process that can be visualized as a sequence of motions and switching functions can be controlled by CNC. These motions and switching functions are input in the form of alphanumeric instructions.
CNC is the basis of flexible automation which helps industries cut down time-to-market and enables launch of even low volume products. Unlimited muscle power, unmanned operation, independent axes coordinated through software, simplified generic tooling even for the most complex jobs and accurate construction are some of the salient features of CNC.

CNC Machine
Automats and Special Purpose Machines (SPMs) require special cams/ templates and clutch settings for each part. Manufacture of these cams/ templates is costly and slow. Furthermore, changing over from one part to the other on these machines also consumes considerable time. The high cost and long time of these ?hard automated? machines to produce parts can be justified only in mass production. With the advent of fast, rigid and accurate CNC machines and sophisticated CAM packages, generation of NC programs and change over from one product to the other are easy and fast as it does not require any mechanical change. These in conjunction with advanced cutting tools have made High Speed Cutting (HSC) of hard materials a reality.

Therefore, CNC machining has become a standard means to produce dies and molds; tool makers today require EDM only for producing inaccessible regions, sharp corners, tiny features and desired surface quality. Intricate aerospace parts are realized through 5 axis CNC machining. Internet technology in a global village enables designing in one place, NC programming and verification in another place and actual machining in yet another place.


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