Question

what is the CNC machine?

Answer 1

CNC is Comupterised Numerically controlled Machine..

Its a advance version of lathe machine, Hope you are aware of lathe machine. All the operations inside the machine are automised. Man power is used just to load/ unload the job and look for the maintenance.

Once Job loaded, you need to give the co-ordinates of the job. It is programmed and the job is done quickly with almost zero error. It can do all the job what can be done on Lathe machine, like boring, tapping, threading, facing , turning.. etc.. It has pressurized fluid outlet with controlled flow inside and is synchronized with chuck..

This is brief on CNC to understand... want in detail ??

Answer 2

Numerical control (NC) refers to the automation of machine tools that are operated by abstractly programmed commands encoded on a storage medium, as opposed to controlled manually via handwheels or levers, or mechanically automated via cams alone. The first NC machines were built in the 1940s and 1950s, based on existing tools that were modified with motors that moved the controls to follow points fed into the system on punched tape. These early servomechanisms were rapidly augmented with analog and digital computers, creating the modern computer numerical control (CNC) machine tools that have revolutionized the machining processes.

In modern CNC systems, end-to-end component design is highly automated using computer-aided design (CAD) and computer-aided manufacturing (CAM) programs. The programs produce a computer file that is interpreted to extract the commands needed to operate a particular machine via a postprocessor, and then loaded into the CNC machines for production. Since any particular component might require the use of a number of different tools-drills, saws, etc., modern machines often combine multiple tools into a single "cell". In other cases, a number of different machines are used with an external controller and human or robotic operators that move the component from machine to machine. In either case, the complex series of steps needed to produce any part is highly automated and produces a part that closely matches the original CAD design.