*Updated February 3,
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CNC turning centers and lathes may seem identical, but they generally refer to slightly different machines. Lathes generally only turn while turning centers can be more advanced. These machines can be capable of facing, threading, knurling, drilling, boring, reaming, and taper turning. Horizontal CNC turning machines are more common, but vertical machines utilize gravity. Between CNC turning, CNC turning centers, the different types of CNC machines, and more, it can be quite confusing. Within this article, we will focus on the basics of CNC turning to give you a strong foundation and answer the most commonly asked questions.
Feel free to skip around this guide if there is a particular question you have:
CNC turning is a subtractive manufacturing process in which pieces of material are rotated as a machine tool is fed to the piece, removing material to create a finished piece. It is primarily used to manufacture parts that are cylindrical in nature.
Close up photo of CNC Turning in action. [Source]
There are many, many materials that can be used with CNC turning, as shown in this guide. However the most common are metal alloys like aluminum.
CNC lathe machines, or CNC turning machines are machine tools that rotate a bar of material, allowing the cutting tool to remove material from the bar until the desired product is remaining.
The material itself is secured to, and rotated by, the main spindle, while the cutting tool can be moved along multiple axis. The types of parts created by a CNC lathe are often cylindrical, or symmetrical around an axis.
You can break CNC machines down into the following parts, and if you would like to explore them further, this article can help:
CNC machining is far better than manual machining for a few specific reasons:
Accuracy
: Programming a CNC to complete a job creates a consistent and accurate cut to ensure product quality. It can be repeated over and over in the exact same manner.Cost Effectiveness
: The cost of hiring a person to manually machine parts at scale is far more expensive than having a machine do it, as a machine will not tire, does not need lunch breaks, and can, theoretically run 24/7.Speed
: CNC turning can churn out hundreds and hundreds of parts while retaining a consistent end product.While CNC turning rotates the part for cutting, CNC milling rotates the tool to cut the part.
Going further, CNC turning will typically be used for cylindrical parts, as you rely on the part itself to rotate and create the friction to remove material when the cutting tool is placed against it.
On the other hand, CNC milling can create more complex parts as it is the cutting tool (rather than the material) that is spinning.
The difference between turning and milling in CNC machining. [Source]
NC's are numerically controlled machines, whereas CNC's are computer numerically controlled machines. Although they both are automatic machines that, in most cases, work on metal parts and are programmed to enable a desired operation, they differ in operation.
Numerical Control (NC) Machines are controlled with punch cards that are fed into the machine, making the programs difficult to modify. Even to make a small change to the program, the tape would have to be removed, modified, and fed back into the machines.
Computer Numerical Control (CNC) Machines have a built in computer to store the programs and modify the program via the control on the machine.
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The CNC turning process involves material being secured to a spindle within a CNC machine, and a cutting tool moving in linear fashion to act upon the material and remove undesired material until he finished component is all that is left.
CNC turning lathe machines use digital instructions to control the machining process. Currently, the pulse equivalence on CNC turning lathe machines in Deed Machine CNC turning lathe manufacturer commonly reaches 0.001, and the backlash of the feed transmission chain and the screw pitch error can be compensated by the CNC device. Therefore, CNC turning lathe machines can achieve high machining precision. For medium and small CNC turning lathe machines, the positioning accuracy generally reaches 0.03, and the repetition positioning accuracy is 0.01. Deed CNC manufacturer turning centre lathe, CNC horizontal turning center, and CNC vertical turning lathe machine, inquiry for more informations.
When changing the machined parts on a CNC turning lathe machine, it is only necessary to reprogram and input a new program to realize the machining of a new part, which provides great convenience for the production of complex-structured single pieces, small batch production, and trial production of new products.
CNC turning lathe machines can also automatically machine precise and complex parts that are difficult or impossible for ordinary manually operated machine tools to process.
The machining of parts is automatically completed according to the pre-programmed instructions, and the operator only needs to perform simple tasks such as placing punch tapes or operating the keyboard, loading and unloading workpieces, conducting intermediate checks on key processes, and observing the operation of the lathe. There is no need for complex repetitive manual operations.
CNC turning lathe machines generally have good safety protection, automatic chip removal, automatic cooling and automatic lubrication devices, which greatly improve the working conditions of operators.
The spindle speed and feed rate of CNC turning lathe machines have a large range of variation, so advantageous cutting amounts can be used in each process. CNC turning lathe machines have good structural rigidity and allow for strong cutting with large amounts, which improves cutting efficiency and saves maneuvering time.
Because the moving parts of CNC turning lathe machines have high-speed idle strokes, the clamping time and auxiliary time of the workpiece are less than those of conventional machine tools.
When the workpiece being machined is changed on a CNC turning lathe machine, the lathe almost does not need to be readjusted, which saves installation and adjustment time. CNC turning lathe machines have stable machining quality and generally only do initial inspections and sampling inspections of key dimensions between processes, saving downtime inspection time. When machining is performed on a machining center, a lathe can perform continuous machining of multiple processes, and the increase in production efficiency is even more significant.
Using CNC turning lathe machines for machining can save time and cost for line drawing, adjustment, machining, and inspection, and save direct production costs.
Generally, special fixtures do not need to be made for machining parts, which saves process and equipment costs.
CNC machining has stable precision, reducing the scrap rate and further reducing production costs.
CNC turning lathe machines can be used for multiple purposes, saving factory space and construction investment.
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