CNC Aluminum Machining parts for aerospance industry
Aluminum is the most widely used material on military and aerospace parts as this is light weight and easy to machine amount the cnc-aluminum-machining, one more thing is that the cost to make a part from this material is the cheapest and easy to do post finish with different colors.
From aluminum material, it’s easy to cut by steel tools, with the structures that are not able to reach by the tools such as the undercuts, we will do via EDM, EDM is a process to etching the material little by little until it is same as the design, but the surface after EDM is rough and will need to do sanding smooth a little more to make it smooth and good appearance for cnc-aluminum-machining parts.
For the straight shape design, there is wire cutting process. Normally after CNC aluminum machining, the structure that will need wire cutting will do a second machining with that and this process normally requires longer time than CNC, there are fast wire cutting and slow wire cutting, the difference is that slow wire cutting has a higher precision than fast wire cutting, but the cost for slow wire cutting is higher too as time is money.
The most common post finishing for military and aerospace cnc aluminum machining prototypes is anodizing. Anodizing is a process of doing a chem film first to clean the part, and then will apply a sand blasting on the part surface in order to cover some tool marks and imperfections, after finish this step, parts will be put into the anodizing pool for several minutes to get the chemical reaction with the relative colors.
Almost every colors can be achieved through anodized process, and the most common one is black anodized and clear anodized. Besides the normal anodized, there is also hard anodized, which is a coating with thicker layers on the parts. And also microarc oxidation for military cnc aluminum machining parts, powder coat especially outdoor powder coat, plating, zinc plating, electropolish, painting and so on.