What is CNC Machining ?

Question

I know it stands for Computer Numerically Controlled but I don't know why it's used ? What there for ? And what they make or are used for ? Any help, please & thank you :) x
Links are goood (Y) x

Answer 1

CNC machining simply means a computer controls the movements of a machine as opposed to a human operator. Machines that would typically be CNC are Lathes and Mills.



CNC machinging although not necessarily more accurate than a human operator, will provide far more consistancy in accuracy and quality. A good operator will be able to make 1 part as well as CNC but if 100 parts are needed then CNC will produce far less failures.



They can make all sorts of things, the list would be endless. I can't provide any links but i'd start with wikipedia and go from there.

Answer 2

CNC Machining is a process used in the manufacturing sector that involves the use of computers to control machine tools. Tools that can be controlled in this manner include lathes, mills, routers and grinders.

On the surface, it may look like a normal PC controls the machines, but the computer's unique software and control console are what really sets the system apart for use in CNC machining.

Under CNC Machining, machine tools function through numerical control. A computer program is customized for an object and the machines are programmed with CNC machining language (called G-code) that essentially controls all features like feed rate, coordination, location and speeds. With CNC machining, the computer can control exact positioning and velocity. CNC machining is used in manufacturing both metal and plastic parts.

Answer 3

Yes, actually its sound what its name Computer numeric control, as these machines have a microcomputer installed in them to work or to do milling or cutting.



These machines are easy to use with easy instructions and manuals. And today the market of CNC machines has grown as businesses require less skilled labor and raw material. These have become a major way to increase productivity.



The CNC machines work as owner instruct them and can get require size and design for higher productivity in reduced time and I want to share a source that provide Used CNC Machines at easy EMI is Superior Machinery.

Answer 4

In any manufacturing industry machines are used to make all sorts of items. For something like producing a shaped piece of metal that needed to turned on a Lathe, if the work was being done by hand, it would involve putting the raw piece of metal in the machine, doing some work, taking the piece out, repositioning it, and then making the next cut, and so on until the piece was the size and shape required for the final piece. That finished piece of would then be removed, a new raw piece put into the lathe and the process repeated until the required number of pieces were produced.



CNC - Computer Numerically Controlled - simply refers to controlling an automated process. First the machine has to be designed to handle the piece of metal and work it without a person being involved. This is the kind of automation you see in factory machinery. The CNC components are then added to control the automated machinery. It is a computer that can be programmed by the operator to make the machine the work that is required for each particular job.



You can see a good example of a CNC machine at work here:



https://www.youtube.com/watch?v=d7irdVe7gi0

Answer 5

CNC Stands for Computer Numerically Controlled. Which basically in layman's terms means Computer Controlled machining. My company , Manta Machinery, buys and sells all types of used CNC Machinery.



CNC Machinery is far superior in time and accuracy compared to operating a manual machine. A CNC Machine loads programs in it from CAD (computer aided drafting) directly into the CNC Control

and the CNC Machine cuts the part out of steel , aluminum, plastic or whatever material the job requires.



CNC Machinery has changed the way the world does manufacturing.

These machines new range anywhere from 5,000 to millions of dollars to the most sophisticated

CNC Machine to the simplest hobby garage small cnc lathe.

Some CNC Mills or lathes can be as accurate as .000001 " AMAZING !

Answer 6

CNC Machining is the one kind of process that involves computers to control machine tools used in manufacturing sector.

Answer 7

IN short. There are encoders mounted on the various shafts, x,y,z =Length, width and Height. Every rotation of the drive shaft rotates the appropriate encoder, 1 rotation may create as many as 3000 pulses. These pulses are sent to the computer and the computer counts them. Hence the computer knows the position of the tool. Data may be entered in millimeters and the computer converts these millimeters to a count for the pulses. So if 1 mm = 1000 pulses then 2.505 mm = 2505 pulses, then you can achieve the desired accuracy. There are other things to take into account like speed of rotation, gearing ,direction etc but this gives you an outline.

Answer 8

Here's a promotional video for a 5-axis CNC milling machine:

http://www.youtube.com/watch?v=0LCaRqQ8Qf8



The basic order of operations is this:

Tool spins, coolant sprays, metal flies, part is made.