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What is CNC machining?
THECNC machining (Computer Numerical Control), also called precision machining, is a technology that is an integral part of the mechanical parts manufacturing process.
Used in many industries, this manufacturing technique uses intelligent machine tools controlled by computerized controls to machine parts. CNC machining makes it possible to start from a raw part to high-precision custom parts produced in series.
CNC machining works from a program, from a 3D model of the part, which will indicate the important steps to follow at the Machine tool, and that, in detail (speed, movement, tool choice, etc.).
This partly automated process step has its place in theIndustry 4.0, it makes it possible to create extremely precise parts and to carry out unique production series, of small, medium and large dimensions. We are talking here about micro machining.
What is CNC micro machining?
The micro machining CNC is a combination between theprecision machining as well as traditional machining, we generally speak of CNC micromachining for very complex machining operations requiring extreme precision and tolerances.
CNC machining and micromachining CNCs have the same approach.
The only difference is the precision of their operations:
- CNC machining most often involves removing layers of material from a raw part, such as milling (cnc milling) and turning (cnc lathe).
- While CNC micro machining requires “miniaturized” tools of greater precision intended for parts with higher needs.
The fact of using miniature tools makes it possible to perform very small machining operations, close to the micron, sometimes almost invisible to the naked eye. At LGC Industries, we master both CNC machining and micro machining.
Why give priority to CNC machining?
Precision machining is an important step in the manufacturing process, it can be replaced by traditional methods such as conventional machining, but this prototyping and manufacturing technique offers a multitude of advantages:
- Precision : theCNC machining makes it possible to obtain parts with ultra-precise dimensions and tolerances.
- Flexibility : CNC machining has the advantage of adapting to a variety of materials, thus offering great flexibility. In addition, this technology makes it possible to produce complex shapes that would be difficult to obtain with conventional machining.
- Rapidity : integrated into Industry 4.0 technologies, theprecision machining combines speed and efficiency in its use, this makes it possible to quickly produce flawless parts.
The positive impact of CNC machining in the industrial world
Before the invention of this technology, manufacturing processes were mostly manual and required considerable work on the part of workers, which made manufacturing processes difficult or even laborious.
In 1952, theprecision machining was created thanks to Richard Kegg and his collaboration with MIT (Massachusetts Institute of Technology) on the first CNC milling machine.
Between the years 60 and 1980, the CNC machine tool and precision machining are taking shape, thanks to digital technology that makes the automation of production processes much more efficient. In the space of 25 years:
- The precision of the machinesCNC machining has improved significantly
- Programming is easier and more complete
- Manufacturing time is accelerating, improving manufacturer productivity at many stages of the process.
Today, precision machining has become an essential element in the industrial world, in fact, it has the capacity to meet dimensional tolerances for fields of activity requiring the greatest vigilance such as medical, aeronautics, armaments...
How does LGC integrate CNC machining into its industrial manufacturing process?
This cutting-edge technology is in perfect harmony with our strategy of continuous improvement in quality, efficiency, precision, production and customer satisfaction.
Thanks to theprecision machining, we can get even closer to our primary objective: “Good the first time.”
In order to further improve precision, cost, quality and deadlines, we combine precision machining with other other CNC machining processes at various stages of our production process.
The CNC lathe, an example of precision machining
CNC turning is a highly precise machining process that works on the principle of a traditional lathe. It involves placing the cutting tool against a turning part to remove material and thus give the desired shape to a part by removing material.
When the CNC lathe comes into operation, it makes the part rotate along a double axis movement, a pointed cutting tool then comes into contact with the material, making it possible to shape the material. For the CNC lathe, computer programs are used to control the center of the CNC lathe, thus ensuring the production of extremely precise components.
The difference between CNC lathe and CNC milling
A lot of people confuse the CNC turning And the CNC milling, but they clearly stand out.
- For CNC milling, just like in most other CNC machining processes, the part is generally attached to a support while a moving tool shapes it.
- For a CNC lathe, it's the opposite way: the part rotates while the material removal tool remains stationary.
How CNC turning works:
- The rotation of the workpiece is controlled by the CNC lathe spindle, thus offering a choice of speed for optimal precision.
- The trolley moves to position the part in relation to the cutting tool, thus ensuring precise cutting.
- The cutting depth of the tool is adjusted precisely by moving the crosspiece
- The cutting tool now moves in order to perform the machining operations indicated on the programming.
Tapping
The combination of Tapping And theCNC machining is a cost-effective, fast process that is fully integrated into the LGC production process, making it possible to obtain a series of taps. Process that we find for example in the manufacture of our Intervis® slotted threaded inserts.
To make Tapping CNC, you must first adjust the CNC machining center and program it while ensuring that all the important factors are taken into account (depth, speed...). Once the programming has been carried out, the tapping of a series of parts can begin and this operation will be fully automated.
The fluting by CNC machining
The combination of Fluting And of theCNC machining is a process for obtaining splines on parts in an automated manner.
Splines are furrows that are positioned parallel to the part, most often in the direction of the length. It is the spline machine at the exit of the CNC lathe that makes the mechanical spline (s).
The creation of flutes requires programming of the fluting machine, in which it is necessary to take into account:
- The positioning of the part
- Of the trajectory of the tool performing the splines
- From the depth of the groove
- From the speed of rotation
- As well as the speed of advancement of the tool.
Once the programming has been carried out, the fluting of a series of parts can begin and this operation, of which we are the experts, will be fully automated.
Example of a splining operation: The fluted pin.
CNC machining
The combination of decolleting And of theCNC machining is a process that makes it possible to obtain turned parts in an automated manner.
For CNC turning, it is necessary to program the machine tool, in which it is necessary to take into account:
- How fast the main spindle rotates the material bar
- The positioning of the part
- Of the trajectory of the cutting tool
- From the depth of the decolleting
Once the programming has been carried out, the turning of a series of parts can begin and this operation will be fully automated.
Example of a bar turning operation: The low-cut pin.
The contribution of on CNC machining at LGC
We are proud of our 85 years of expertise in the field of cylindrical fastening solutions. We do everything we can to help our customers Designing together products adapted to their specific needs.
We are available to support you at each stage of your project and offer you a personalized and quality service.
Innovation and continuous improvement are an integral part of our core values. At the service of our customers, we master CNC machining in order to guarantee you an automated production of serial parts combining speed and quality.
If you have questions or want to know more about our products and services, do not hesitate to contact us.
