Usinage CNC Invar: Un guide complet
CNC machining Invar requires understanding the properties of this material and its significance for choosing the right methods for cooling, tooling, and cutting parameters. The components of Invar which have been machined properly have the ability to maintain their dimensional integrity. This guide below offers a detailed analysis of CNC machining Invar, so let's read.
What is CNC Machining Invar?
The process of machining Invar comprises manufacturing precise components from the alloy Invar. It is an alloy of nickel and iron. Invar has a low coefficient of thermal expansion. The process of CNC machining allows shaping and cutting Invar alloy to create intricate components that have tight tolerance.
The CNC machined Invar part is used in various industries like optics, aerospace, and electronics. It is mostly chosen due to its stable nature with changing temperatures and its high precision components.
CNC Machining Invar Processes
The different types of CNC machining processes for manufacturing Invar components comprise the following:
Fraisage CNC
Fraisage CNC machines are rotary cutters that help remove material from the Invar workpiece. The process of CNC milling requires choosing the tools for the process very carefully because Invar has work-hardening properties. Hence, the need to maintain the precision of controlling speed and feed rates is very important to achieve the desired quality finish.
Tournage CNC
The CNC turning process has CNC lathes which help produce cylindrical components using Invar. The process of CNC turning consists of rotating the workpiece of Invar while the cutting tool remains stationary.
During the process of CNC turning the cooling process is very important; it reduces heat buildup causing the surface to have defects. The heat buildup caused is due to the low thermal conductivity of Invar.
Perçage CNC
The process of CNC drilling needs high speed and sharp drills. These drills can be made using high-speed steel or carbide which can penetrate the material. The process of drilling needs the right lubrication and slow feed rates to ensure precise holes are created.
Advantages of CNC Machining Invar
CNC machining Invar offers a lot of benefits and some of these are given below:
Stabilité dimensionnelle
Invar offers an exceptionally low coefficient of thermal expansion which helps to ensure precise dimensions of the components are maintained. Hence, despite the temperature fluctuations, the CNC machined components of Invar are dimensionally stable and can be used in applications that need high accuracy.
Cohérence
CNC machining offers exceptional repeatability and consistent production of components which are complex. Hence, one after the other batches produced using Invar through CNC machining are identical, having tight tolerance and perfection.
Personnalisation
CNC machining is a process that offers maximum control, which means that custom sizes, shapes, and features can easily be created. It is a highly flexible process and hence Invar components that need customization based on project requirements can be manufactured.
Complexity in Shape
CNC machining Invar alloys create components that have complex geometries and require detailed features. Hence, components that need precision due to their application can easily be manufactured through this process.
Surface Finishes for CNC Machined Invar Parts
After the process of CNC machining Invar has taken place, some further processing may be needed to enhance the surface finishing of the components, and some of these processes comprise the following:
As- Machined
The components of Invar that are put to use right after CNC machining fall under the category of as-machined. These parts may have some tool marks and are rough but they are suitable for internal components.
Broyage
The process of grinding is used when highly smooth finishing and extremely tight tolerance are needed. It consists of using an abrasive wheel which helps to remove the excessive material from the components. It is used in applications where the smoothness and flatness of the surface are crucial.
Électropolissage
Electropolishing is a process that helps remove a layer of material from the surface of an Invar component. It is an electrochemical process and it offers a very clean and reflective surface that is highly corrosion-resistant. Such a surface finishing is opted for components where highly clean and minimal contaminated components are required.
Polissage
The process of polishing Invar components comprises housing materials and compounds that are abrasive to attain a smooth surface. The process of polishing reduces the roughness and is suitable for optical devices.
Sablage de perles
Bead blasting involves bombarding the component’s surface with the spherical particles which create a uniform finish. Such a process gives a matte finish to the components and is opted where a non-reflective surface is required.
Applications of Invar Machined Parts
The components manufactured after machining invar 36 are used in various applications, some of these applications are as follows:
Électronique
CNC-machined Invar is used in the frame of semiconductor equipment as the fluctuation of temperature requires components that are dimensionally stable. The significance of ensuring that no misalignment must take place requires frames that stay rigid.
Optical
Manufacturing optical instruments that require high-precision components makes CNC machining Invar components suitable. The instruments may consist of microscopes, and telescopes which must have image clarity and accuracy in measurements.
Aérospatiale
The construction of optical benches, satellite structures, and antenna systems of spacecraft need dimensional stability. The varying temperature in space requires appropriate support so that the reception and transmission of the signals are not disrupted.
Médical
MRI machines comprise Invar components, which allow the maintenance of the alignment of magnetic fields in a precise way. Also, the surgical instruments and medical devices are manufactured with Invar which needs high stability and precision.
Conclusion
Invar is opted because of its excellent dimensional stability, it supports various applications by staying rigid and firm and ensuring performance. Hence, when it comes to having custom Invar components manufactured through CNC machining your choice should be DEK. You can have your choice of size, shape, and project-based CNC machined parts of Invar.
FAQ
Is Invar difficult to machine?
Inverary is ductile and tough, hence machining it could be challenging. The carbide of high-speed steel-based tools is suitable for machining Invar.
Quelle est la différence entre l'Inconel et l'Invar ?
Invar is an alloy of iron and nickel, whereas Inconel is composed of chromium and nickel.
What grade of Invar is commonly used for CNC machining?
Invar 36 is the widely used grade for CNC machining as it offers ideally low thermal expansion properties.
